DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications General Description Features The AAT3663 BatteryManager™ is a member of Skyworks' • 4.0V ~ 13.2V Input Voltage Range Total Power Management IC™ family. This device is an • Compatible with USB or AC Adapter Sources integrated single/dual cell Lithium-Ion (Li-Ion) / polymer • Programmable Fast Charge Current from 100mA to 1A battery charger IC designed to operate from USB ports • Programmable Charge Termination Current or an AC adapter inputs up to an input voltage of 13.2V. • Digital Thermal Loop Charge Reduction • Less Than 0.4µA Battery Leakage Current AAT3663 precisely regulates battery charge voltage and • Programming Charge Timer current for 4.2V and 8.4V Li-Ion battery cells. The bat- • Battery Temperature Sensing tery charging current is user programmed up to 1A by an • Battery Temp Sense Open Circuit Detection external resistor. • Automatic Recharge Sequencing Battery charge state is continuously monitored for fault • Automatic Trickle Charge for Battery Pre-Conditioning conditions. A Digital Thermal Loop Control maintains the • Automatic Charge Termination Shutdown/Sleep Mode maximum possible battery charging current for the opti- • Less than 1µA Shutdown Current mum set of input to output power dissipation and ambient • Over-Voltage and Over-Current Protection temperature conditions. In the event of an over-current, • Power On Reset and Soft Start over-voltage, short-circuit, or over-temperature fault con- • 3 × 3mm 14-pin TDFN Package dition, the device will automatically shut down, thus pro- tecting the charger and the battery under charge. Applications Two status monitor output pins are provided to indicate • Digital Still Cameras the battery charge status by directly driving external • Global Positioning Systems (GPS) LEDs. Additionally, an open-drain power-source detec- • Point Of Service (POS) Terminals tion output (ADPP#) is provided to report presence of an • Portable DVD Players input power supply • Portable Media Players (PMP) • Two Way Radios The AAT3663 is available in a thermally enhanced, space-saving, 14-pin 3 × 3 mm TDFN package and is specified for operation over the -40°C to +85°C tem- perature range. Typical Application ON/OFF EN BATS BATT+ V IN IN BAT 10µF BATT-- AAT3663 TEMP STAT1 TS STAT2 TERM Battery ISET ADPP# Pack CT GND R R C SET TERM T Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 1 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Pin Description Pin # Symbol Type Function Enable pin, Active high with internal pull-down. If not used, pull high to the IN pin to continuously 1 EN I enable the charger IC when input power is applied. Charge timer programming pin. A 0.1µF ceramic capacitor should be connected between this pin 2 CT I and GND. Connect directly to GND to disable the timer function. Charge current programming pin. Connect a resistor between this pin and GND to program the con- 3 ISET I stant fast charge current. 4 GND I/O IC ground connection. Connect this pin to power ground. 5 TS I/O Battery temperature sense input. Connect the Li-Ion battery pack NTC resistor terminal to this pin. Battery voltage sense pin. Connect this pin directly to the positive battery terminal. If this function 6 BATS I is not used, connect to the BAT pin directly. 7 BAT O Battery charge output pin. Connect to the positive battery terminal. 8, 9 IN I Power supply input pin. Connect the input USB port or Adapter power source to this pin Charge status pin, open-drain output. Connect the STAT2 LED with a series ballast resistor between 10 STAT2 O IN and this pin. Charge status pin, open-drain output. Connect the STAT1 LED with a series ballast resistor between 11 STAT1 O IN and this pin. Input supply power-good status pin, open-drain output. Connect the ADPP# status LED with a series 12 ADPP# O ballast resistor between IN and this pin. Charge termination current programming input pin. Connect a resistor between this pin and GND 13 TERM I to program the charge termination current. When TERM is open, the termination current is 10% (default sertting) of the set maximum charge current. 14 N/C No connection. Pin Configuration TDFN33-14 (Top View) EN 1 14 N/C CT 2 13 TERM ISET 3 12 ADPP# GND 4 11 STAT1 TS 5 10 STAT2 BATS 6 9 IN BAT 7 8 IN Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Absolute Maximum Ratings1 Symbol Description Value Units V IN Continuous Voltage -0.3 to 14 IN V STAT1, STAT2, ADPP#, EN, BAT, BATS -0.3 to V + 0.3 V N IN V TS, CT, TERM, ISET -0.3 to 5.5 N T Operating Junction Temperature Range -40 to 150 J °C T Maximum Soldering Temperature (at Leads) 300 LEAD Thermal Information2 Symbol Description Value Units q Maximum Thermal Resistance (TDFN3x3) 50 °C/W JA P Maximum Power Dissipation 2 W D AAT3663 Feature Options Product Number of Battery Cells Battery Temperature Sense AAT3663-4.2-1 Single For Use With Any NTC Thermistor AAT3663-4.2-2 Single For Use With 10kΩ NTC Thermistor AAT3663-8.4-1 Dual For Use With Any NTC Thermistor AAT3663-8.4-2 Dual For Use With 10kΩ NTC Thermistor 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time. 2. Mounted on a FR4 board. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 3 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Electrical Characteristics V = 5V, T = -40 to +85°C; Unless otherwise noted, typical values are at T = 25°C. IN A A Symbol Description Conditions Min Typ Max Units Operation V Input Voltage Range 4.0 13.2 V IN Under Voltage Lockout Threshold Rising Edge 3 4 V V UVLO UVLO Hysteresis 150 mV Adapter Present Indicator Threshold V V > V 50 100 mV ADPP_TH Voltage, V – V IN UVLO IN BAT I Operating Current Charge Current = 100mA 0.35 1 mA OP I Shutdown Current V = 4.25V, EN = GND 0.4 1 µA SHUTDOWN BAT I Leakage Current from BAT Pin V = 4V, IN = Open 0.4 2 µA LEAKAGE BAT EN EN Pin Leakage V = 5V 0.6 µA LEAKAGE EN Voltage Regulation AAT3663-4.2 4.158 4.2 4.242 V End of Charge Voltage Regulation V BAT_EOC AAT3663-8.4 8.316 8.4 8.484 DV / BAT_EOC End of Charge Voltage Accuracy 0.5 % V BAT_EOC AAT3663-4.2 2.5 2.6 2.7 V Preconditioning Voltage Threshold V MIN AAT3663-8.4 5.0 5.2 5.4 AAT3663-4.2 V - 0.1 V Battery Recharge Voltage Threshold BAT_EOC V RCH AAT3663-8.4 V - 0.2 BAT_EOC Current Regulation I Charge Current Programmable Range 100 1000 mA CC_RANGE I Constant-Current Mode Charge RISET = 1.74KΩ (for 1A), VBAT = 3.6V 900 1000 1100 mA CH_CC Current R = 17.8KΩ (for 0.1A), V = 3.6V 80 100 120 ISET BAT V ISET Pin Voltage 2 V ISET K Charge Current Set Factor: I /I Constant Current Mode, V = 3.6V 900 ISET CH_CC SET BAT V TERM Pin Voltage R = 40kW 0.6 V TERM TERM I Trickle-Charge Current 5 10 15 % I CH_TRK CH_CC TERM pin open 5 10 15 % I I Charge Termination Current Threshold CH_CC CH_TERM R = 13.3 kW, I ≥ 800mA 8 10 12 % I TERM CH_CC CH_CC Charging Devices R Charging Transistor ON Resistance V = 5V 330 500 mΩ DS(ON) IN Logic Control / Protection Input High Threshold 1.6 V V EN Input Low Threshold 0.4 V Output Low Voltage STAT Pin Sinks 4mA 0.4 V STAT I STAT Pin Current Sink Capability 8 mA STAT Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 4 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Electrical Characteristics V = 5V, T = -40 to +85°C; Unless otherwise noted, typical values are at T = 25°C. IN A A Symbol Description Conditions Min Typ Max Units Logic Control / Protection V Output Low Voltage ADPP# Pin Sinks 4mA 0.4 V ADDP# I ADDP# Current Sink Capability 8 mA ADPP# AAT3663-4.2 4.4 V Over-Voltage Protection Threshold V OVP AAT3663-8.4 8.8 V Over-Current Protection Threshold 105 %V OCP CS TK Trickle Charging Time-Out C = 100nF, V = 5V T /8 Hour T IN C TC Trickle and Constant Current Mode Time-Out C = 100nF, V = 5V 3 Hour T IN TV Constant Voltage Mode Time-Out C = 100nF, V = 5V 3 Hour T IN I Current Source from TS Pin AAT3663-2 Only 71 75 79 µA TS Threshold, AAT3663-2 Only 316 331 346 T TS Hot Temperature Fault mV S1 Hysteresis, AAT3663-2 Only 25 Threshold, AAT3663-2 Only 2.30 2.39 2.48 V T TS Cold Temperature Fault S2 Hysteresis, AAT3663-2 Only 25 mV Threshold, AAT3663-1 Only 29.1 30 30.9 V High Temperature Threshold %V TS1 Hysteresis, AAT3663-1 Only 2 IN Threshold, AAT3663-1 Only 58.2 60 61.8 V Low Temperature Threshold %V TS2 Hysteresis, AAT3663-1 Only 2 IN T Digital Thermal Loop Entering Threshold 115 °C LOOP_IN T Digital Thermal Loop Exiting Threshold 85 °C LOOP_OUT T Digital Thermal Loop Regulation 100 °C REG Threshold 140 T Over-Temperature Shutdown °C SHDN Hysteresis 15 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 5 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Typical Characteristics—General Operating Current vs I Resistor Constant Charging Current SET vs. Set Resistor Values 2000 A) 10000 m µA) 11680000 nt ( nt ( 1400 Constant Current Mode rre 1000 e u r 1200 C Cur 1000 ge 100 g 800 ar n h erati 460000 nt C 10 p a O 200 st Preconditioning Mode n 0 o 1 1 10 100 C 1 10 100 R (kΩ) R (kΩ) SET SET Temperature Sense Output Current Shutdown Current vs. Input Voltage vs. Temperature 80 2.40 79 A) 2.10 85°C 78 µ 77 nt ( 1.80 I (µA)TS 777456 wn Curre 011...925000 -2450°°CC 73 o d 0.60 72 ut 71 Sh 0.30 70 0.00 -40 -15 10 35 60 85 4 5 6 7 8 9 10 11 12 13 14 Temperature (°C) Input Voltage (V) Charging Transistor On Resistance CT Pin Capacitance vs. Counter Timeout vs. Input Voltage 600 1.0 0.9 500 85°C F) 0.8 m)Ω 400 ce (µ 00..67 Preconditioning Timeout (S(ON) 300 citan 00..45 RD 200 apa 0.3 CPurerrceonnt dTitimioneionugt +o rC Coonnsstatannt t 100 25°C -40°C C 0.2 Voltage Timeout 0.1 0 0.0 4.0 4.4 4.8 5.2 5.6 6.0 6.4 6.8 7.2 7.6 8.0 8.4 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Input Voltage (V) Timeout (h) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Temperature Sense Too Hot Threshold Voltage Temperature Sense Too Cold Threshold Voltage vs. Temperature vs. Temperature Hot 3301..80 Cold 6601..80 mperature Sense Too Threshold (%) 2222333399990000........24680246 mperature Sense Too Threshold (%) 5555666699990000........24680246 Te 29.0 Te 59.0 -40 -15 10 35 60 85 -40 -15 10 35 60 85 Temperature (°C) Temperature (°C) Input High Threshold vs. Input Voltage Input Low Threshold vs. Input Voltage 1.30 1.3 1.20 1.2 1.10 1.1 V) 1.00 -40°C V) 1.0 -40°C (H) (L) N( 0.90 N( 0.9 E E V V 0.80 0.8 0.70 25°C 85°C 0.7 25°C 85°C 0.60 0.6 4 5 6 7 8 9 10 11 12 13 14 4 5 6 7 8 9 10 11 12 13 14 Input Voltage (V) Input Voltage (V) Termination Current to Constant Current Ratio (%) vs. Termination Resistance 50 45 40 %) (CC 3305 H_ C 25 /IRM 20 E H_T 15 IC 10 5 0 0 10 20 30 40 50 60 R (kΩ) TERM Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 7 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Typical Characteristics—Single Cell 4.2V End of Charge Voltage Accuracy vs. Input Voltage End of Charge Voltage vs. Temperature (V = 4.2V) BAT_EOC 0.100 4.220 ge cy (%) 00..005705 e (V) 44..221105 Charcura 00..000205 oltag 44..220005 d of e Ac -0.025 ry V 4.195 ng e Eolta -0.050 Batt 4.190 V -0.075 4.185 -0.100 4.180 4 5 6 7 8 9 10 11 12 13 14 -40 -15 10 35 60 85 Input Voltage (V) Temperature (°C) Recharge Threshold Voltage vs. Input Voltage Recharge Voltage vs. Temperature (V = 5V; R = 8.87kΩ) IN SET 4.120 4.14 4.115 4.13 e (V) 4.110 e (V) 4.12 g 4.105 g 4.11 a a olt 4.100 olt 4.10 V V y 4.095 y 4.09 r r e e att 4.090 att 4.08 B B 4.085 4.07 4.080 4.06 4 5 6 7 8 9 10 11 12 13 14 -40 -15 10 35 60 85 Input Voltage (V) Temperature (ºC) Charging Current vs. Battery Voltage Charging Current vs. Battery Voltage (R = 8.87KΩ) SET 240 1200 V = 12V V = 13.2V A) 210 IN IN 1000 RSET = 1.78kΩ m rrent ( 115800 VIN = 5V VIN = 7.5V VIN = 9.5V mA) 800 RSET = 2.21kΩ ng Cu 19200 I (CH 460000 RSET = 3.57kΩ Chargi 3600 200 RSET = 8.87kΩ 0 0 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 Battery Voltage (V) Battery Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 8 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Typical Characteristics—Single Cell 4.2V Preconditioning Threshold Voltage vs. Input Voltage Preconditioning Threshold Voltage vs. Temperature 2.70 2.70 2.68 2.68 V) 2.66 V) 2.66 e ( 2.64 e ( 2.64 g g a 2.62 a 2.62 olt 2.60 olt 2.60 V V y 2.58 y 2.58 r r e 2.56 e 2.56 att 2.54 att 2.54 B B 2.52 2.52 2.50 2.50 4 5 6 7 8 9 10 11 12 13 14 -40 -15 10 35 60 85 Input Voltage (V) Temperature (°C) Preconditioning Charge Current Constant Charge Current vs. Input Voltage vs. Input Voltage (RSET = 8.87KΩ) 120 240 RSET = 1.78kΩ 230 100 A) A) 80 RSET = 2.21kΩ nt (m 221200 m e I (CH_TRK 246000 RRSSEETT == 38..5877kkΩΩ Charge Curr 111278900000 VVBABTA T= = 4 3.1.9VV VBAT = 3.3V VBAT = 3.5V 0 160 4 5 6 7 8 9 10 11 12 13 14 4 5 6 7 8 9 10 11 12 13 14 Input Voltage (V) Input Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 9 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Typical Characteristics—Dual Cell 8.4V End of Charge Voltage Accuracy vs. Input Voltage End of Charge Voltage vs. Temperature (V = 8.4V) (V = 10V; R = 8.87kΩ) BAT_EOC IN SET %) y ( 0.12 8.44 ac 0.09 8.43 Accur 0.06 e (V) 8.42 oltage 00..0003 Voltag 88..4401 ge V -0.03 ery 8.39 Char --00..0096 Batt 88..3378 of d -0.12 8.36 En 9.0 9.6 10.2 10.8 11.4 12.0 12.6 13.2 -40 -15 10 35 60 85 Input Voltage (V) Temperature (°C) End of Charge Voltage vs. Input Voltage Recharge Threshold Voltage vs. Input Voltage (R = 8.87kΩ) SET 8.420 8.220 8.415 8.215 e (V) 8.410 e (V) 8.210 g 8.405 g 8.205 a a olt 8.400 olt 8.200 V V y 8.395 y 8.195 r r e e att 8.390 att 8.190 B B 8.385 8.185 8.380 8.180 9.0 9.6 10.2 10.8 11.4 12.0 12.6 13.2 8 9 10 11 12 13 14 Input Voltage (V) Input Voltage (V) Recharge Threshold Voltage vs. Temperature Constant Charging Current vs. Battery Voltage (V = 10V; R = 8.87KΩ) (R = 8.87KΩ) IN SET SET 8.28 240 8.26 A) 210 oltage (V) 888...222024 urrent (m 111258000 V C y 8.18 g 90 Batter 88..1146 Chargin 3600 VVVVIIINNN ==== 11110123VVV.2 V IN 8.12 0 -40 -15 10 35 60 85 4.9 5.3 5.7 6.1 6.5 6.9 7.3 7.7 8.1 8.5 Temperature (°C) Battery Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 10 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Typical Characteristics—Dual Cell 8.4V Constant Charging Current vs. Battery Voltage Preconditioning Threshold Voltage vs. Input Voltage 1200 5.220 5.215 1000 800 RSET = 1.78KΩ e (V) 5.210 mA) 600 RSET = 2.21KΩ oltag 55..220050 I (CH 400 RSET = 3.57KΩ ery V 5.195 att 5.190 200 B 5.185 RSET = 8.87KΩ 0 5.180 4.9 5.3 5.7 6.1 6.5 6.9 7.3 7.7 8.1 8.5 8 9 10 11 12 13 14 Battery Voltage (V) Input Voltage (V) Preconditioning Threshold Voltage vs. Temperature Constant Charge Current vs. Input Voltage (R = 8.87KΩ) SET 5.24 240 5.23 230 oltage (V) 555...222012 rrent (mA) 222012000 V u ery 5.19 ge C 190 VBAT = 7V VBAT = 6.6V Batt 5.18 har 180 VBAT = 8.2V 5.17 C 170 5.16 160 -40 -15 10 35 60 85 8 9 10 11 12 13 14 Temperature (°C) Input Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 11 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Functional Block Diagram Reverse Blocking IN BAT Current CV/ Compare Precharge BATS Charge UVLO ISET Constant Control Current TERM Over-Temp Thermal Protect Loop Power ADPP# Detection STAT 1 Charge Status STAT 2 EN 75µA Watchdog AAT3663-2 Only CT Timer TS Window Comparator GND Functional Description over-temperature condition caused by excessive ambient operating temperature or excessive power dissipation The AAT3663 is a high performance battery charger conditions, the AAT3663 enables a digitally controlled designed to charge single/dual cell Lithium-Ion or thermal loop system that will reduce the charging current Lithium-Polymer batteries with up to 1000mA of current to prevent thermal shutdown. The digital thermal loop from an external power source. It is a highly integrated will maintain the maximum possible battery charging stand-alone charging solution, with the least external current for a given set of input to output power dissipa- components required for complete functionality. tion and ambient temperature conditions. The AAT3663 precisely regulates end of charge battery The digital thermal loop control is dynamic in the sense voltage and current for single cell 4.2V and dual cell 8.4V that it will continue to adjust the battery charging current lithium-ion/polymer battery with a programmable con- as operating conditions change. The digital thermal loop stant current range from 100mA to 1A for fast charging will reset and resume normal operation when the power applications. The system has a default charge termina- dissipation or over-temperature conditions are removed. tion current set to 10 percent of the programmed fast In the event of an over-voltage, over-current or over- charge constant. The charge termination current may temperature false condition beyond the limits of the also be user programmed by an external resistor. digital thermal loop system, the device will automati- During battery charging, the device temperature will rise. cally shut down, thus protecting the charging device, In some cases with adapter (ADP) charging, the power control system, and the battery under charge. dissipation in the charge regulation pass device may AAT3663 provides two status monitor pins, STAT1 and cause the junction temperature to rise and approach the STAT2. These pins are open drain MOSFET switches internal thermal shutdown threshold. Excessive power intended to directly drive external LEDs to indicate the dissipation is caused by the high input adapter voltage battery charging state. A third status pin is prided to versus the low output battery cell voltage difference at a indicate the presence of power on the input supply pin. given constant charge current. In the event of an internal Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 12 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications This open drain MOSFET switch may be used to either Constant Current Charging power a display LED or to alert a system microcontroller Trickle charging continues until the battery voltage for the presence on input power. reaches the V threshold. At this point, the AAT3663 MIN begins constant-current fast charging. The current level Battery Charging Operation for this mode is programmed using a single resistor from Figure 1 illustrates the entire battery charging profile the ISET pin to ground. Programmed current can be set and operation, which consists of three phases: at a minimum 100mA up to a maximum 1A. 1. Preconditioning (Trickle) Charge Constant Voltage Charging 2. Constant Current Charge 3. Constant Voltage Charge Constant current charging continues until such time that the battery voltage reaches the voltage regulation point When power is initially applied or when a battery pack is V . When the battery voltage reaches V , the connected to the BAT pin, battery charging commences BAT_REG BAT_REG AAT3663 will transition to the constant-voltage mode. after the AAT3663 checks several conditions in order to The regulation voltage is factory programmed to a nom- maintain a safe charging environment. The input supply inal 4.2V for the AAT3663-4.2 option and to 8.4V for the must be above the minimum operating voltage (UVLO) AAT3663-8.4 option. Under default conditions with the and the enable pin must be high (internally pulled TERM pin not connected (open circuit), constant voltage down). When the battery is connected to the BAT pin the charging will continue until the charge current has AAT3663 checks the condition of the battery and deter- reduced to 10% of the programmed current. Placing a mines which charging mode to apply. resistor between the TERM pin and ground allows the user to program a desired termination current. Battery Preconditioning After the charge cycle is complete, the AAT3663 turns If the battery voltage is below V , the AAT3663 begins MIN off the series pass device and automatically goes into a battery trickle charging by charging at 10% of the pro- power saving sleep mode. During this time the series grammed constant-current. For example, if the pro- pass device will block current in both directions there- grammed current is 500mA, then the trickle charge fore preventing the battery discharging through the IC. current is 50mA. Trickle charging is a recommended safety precaution for a deeply discharged cell and maxi- The AAT3663 will remain in sleep mode, until either the mizes the charge cycle life of the battery. In addition, battery terminal voltage drops below the VRCH threshold, charger IC power dissipation for the internal series pass the charger EN pin is recycled or the charging power MOSFET is minimized when the input-output voltage dif- source is reconnected. In all cases the AAT3663 will ferential is at its highest. This in turn allows the charg- monitor all battery parameters and resume charging in ing operation to commence over wider thermal and input the appropriate mode. to output voltage differential conditions. Preconditioning Constant Current Constant Voltage Trickle Charge Charge Phase Charge Phase Phase Charge Complete Voltage I = Max CC Regulated Current Constant Current Mode Voltage Threshold Trickle Charge and I = CC / 10 Termination Threshold Figure 1: Current and Voltage Profile During Charging Phases. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 13 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications System Operation Flow Chart ADP PowSSSleelleere eeOpppn PowVeorl tSIangpeut NNoo RMMeosodedete AVVDo>PlVt >a gVeADPP IN UVLO Yes Enable NNoo Power Select EN=HIGH Yes SSSSTFhAhhAuTuuUt1tt L= DTDDOofoofwwwnnn STAMMMTo2oo=dddOeeeff Yes FFaauulltt No ConPdiotOiowTVnSoe ,>M rOVro TTSnS,2iteolreincgt YYeess SShSSuMhhhMtuMM ouuDtodtt oo DdoeDDddewoeeoownwwnnn EExxppiirree V<PBVIBAoBATATw<T>eV_IRTrME ESIGRNMe oolerr ct TS<VTS1 NNoo ChSSSahrhhgueuutrtt T DDDimoooewwwrnnn CMoMMnotoordoddleee Preconditioning YYeess PrSeSSchohhnuuudtitt t DioDDnoioonwgwwnnn SSeett VVMMITNINe>>sVtVBABTAT (TrickMlMMe oCoodhddaeeerge) NNoo NNoo Recharge YYeess Current Phase Test YYeess ConSSSshtahhunuutt tt C DDDurorooewwwnntnn DeDveicveic eT eTmemp.p . No V Te>sV t VINV>V>BAVT_EOC ChaMrMMgeooo Mdddoeeede MoMnoitnoirtor RRCCHH BAT CH BAT TTJJ>>111150ϒϒCC NNoo YYeess CuTrhrSSSeenhrhhmtu uuRatltte LDdDDouoocooptwiwwo nnnn In CM.CMM.o ooMdddoeeede YYeess Voltage Phase Test ConSSSshtahhunuutt tt V DoDDlotooawgwwennn IBAIT>>ITE RIM ChaMrMMgeooo Mdddoeeede BAT MIN NNoo CCCChhahharaagrrrgeggeee CCCCoomoommmpplppelellteeetttedeeddd Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 14 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Application Information vide feedback to the BATS pin from the BAT connection with a voltage sensing accuracy loss of 1mV or less. Adapter or USB Power Input Enable (EN) Constant current charge levels up to 1A may be pro- EN is a logic input (active high) to enable the charger, grammed by the user when powered from a sufficient this function is internally pulled down to ground. When input power source. The AAT3663 will operate over an the device is initially enabled or if the EN pin is cycled low input voltage range from 4.0V to 13.2V. The low input and then re-enabled, the charge control circuit will auto- voltage capability of the AAT3663 permits charging sin- matically reset and resume charging functions with the gle cell Li-Ion/Poly batteries from USB ports and lower appropriate charging mode based on the battery charge voltage input power sources. The high 13.2V input rating state and measured battery voltage on the BATS pin. of this device allows for the use of a wide range of input power sources for both single and dual cell Li-Ion/Poly applications. Programming Charge Current The constant current mode charge level is user pro- Adapter Input Charge grammed with a set resistor (R ) connected between the SET Inhibit and Resume ISET pin and ground. The accuracy of the constant charge current, as well as the preconditioning trickle charge cur- The AAT3663 has an under-voltage lockout (UVLO) and rent, is dominated by the tolerance of the set resistor power on reset feature so that if the input supply to the used. For this reason, a 1% tolerance metal film resistor IN pin drops below the UVLO threshold, the charger will is recommended for the set resistor function. The con- suspend charging and shut down. When power is reap- stant charge current levels from 100mA to 1A may be set plied to the IN pin or the UVLO condition recovers, the by selecting the appropriate resistor value from Table 1. system charge control will assess the state of charge on the battery cell and will automatically resume charging in Constant Charging Set Resistor the appropriate mode for the condition of the battery. Current (mA) Value (kΩ) 100 17.8 Battery Connection and 200 8.87 Battery Voltage Sensing 300 5.9 400 4.42 Battery Connection 500 3.57 A single or dual cell Li-Ion/Polymer battery should be 600 2.94 connected between the BAT pin and ground. 700 2.55 800 2.21 Battery Voltage Sensing 900 1.96 The BATS pin is provided to employ an accurate voltage 1000 1.78 sensing capability to measure the positive terminal volt- Table 1: R Values. age at the battery cell being charged. This function SET reduces measured battery cell voltage error between the If the desired charge current level is not listed in Table battery terminal and the charge control IC. The AAT3663 1, the R resistor value can be found in Figure 2 and charge control circuit will base charging mode states SET calculated by the following equation: upon the voltage sensed at the BATS pin. The BATS pin must be connected to the battery terminal for correct operation. If the battery voltage sense function is not R = K · VISET needed, the BATS pin should be terminated directly to SET  ICC the BAT pin. If there is concern of the battery sense function inadvertently becoming an open circuit, the Where: BATS pin may be terminated to the BAT pin using a 10kW resistor. Under normal operation, the connection to the K = KI_SET = 900 battery terminal will be close to 0W; if the BATS connec- VISET = 2V tion becomes an open circuit, the 10kW resistor will pro- ICC = Fast charge constant current Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 15 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Constant Charging Current Termination Current to Constant Current vs. Set Resistor Values Ratio (%) vs. Termination Resistance A) 10000 50 m 45 ent ( 1000 %) 40 Curr (CC 3305 harge 100 /IERMCH_ 2205 de C 10 ICH_T 1105 o M 5 C 1 0 C 1 10 100 0 10 20 30 40 50 60 RSET (kΩ) RTERM (kΩ) Figure 2: Constant Charging Current vs. RSET Figure 3: Charge Termination Current (% Value of Resistor Values. the Programmed Fast Charge Current) vs. R TERM Resistance. Programmable Charge Termination Current Battery Charge Status Indication The AAT3663 is designed with a default charge termina- The AAT3663 indicates the status of the battery under tion current set to 10 percent of the programmed fast charge using three status LED driver outputs. These charge constant current level. The charge termination three LEDs can indicate simple functions such as input current (ICH_TERM) may also be user programmed to a power present, no battery charge activity, battery charg- level other than 10% of the set fast charge current by ing, charge complete and charge fault. connecting a set resistor (R ) between the TERM pin TERM and ground. Status Indicator Display When the charge current under the constant voltage System charging status may be displayed using one or charging mode drops to the charge termination thresh- two LEDs in conjunction with the STAT1 and STAT2 pins old the device halts charging and goes into a sleep on the AAT3663. These two pins are simple open drain mode. The charger will remain in the sleep mode until N-channel MOSFET switches to connect the status LED the battery voltage as sensed by the BATS pin decreases cathodes to ground. It is not necessary to use both dis- to a level below the battery recharge voltage threshold play LEDs if a user simply wants to have a single LED to (V ). Charge termination current levels based on a RCH show “charging” or “not charging”. This can be accom- percentage of the programmed fast charge current are plished by just using the STAT1 pin and a single LED. shown in Figure 3. Using two LEDs and both STAT pins simply gives the user If the desired charge termination current set resistor more information for the various charging states. Refer (R ) value is not shown in Figure 3, the value may be to Table 2 for LED display definitions. TERM determined by the following equation: Event Description STAT1 STAT2 15µA · R I = TERM · I Charge enabled without battery Flash1 Flash1 CH_TERM 2V CH_CC Battery charging ON OFF Where: Charging completed OFF ON Fault OFF OFF I = Charge termination current level CH_TERM ICH_CC = Programmed fast charge constant current level Table 2: LED Status Indicator Truth Table. R = TERM resistor value TERM 1. Flashing rate depends on output capacitance. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 16 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications The LED anodes should be connected to the charger factor of 0.28. The initial thermal loop current can be power source input (IN pin). estimated by the following equation: Input Power Present Indicator I = I · 0.28 TLOOP CH_CC The ADDP# pin provides an additional open drain N-channel MOSFET switch to indicate the presence of The thermal loop control re-evaluates the circuit die tem- power applied to the charger input (IN pin). This func- perature every 1.5 seconds and adjusts the fast charge tion may either be used to control an addition status LED current back up in small steps to the full fast charge cur- to give a visual indication when input power is applied. rent level or until an equilibrium current is discovered This open drain output may also be pulled high via a pull and maximized for the given ambient temperature condi- up resistor to provide an active low signal to a system tion. The thermal loop controls the system charge level; microcontroller to indicate the presence of applied input therefore, the AAT3663 will always provide the highest power. level of constant current in the fast charge mode possible for any given ambient temperature condition. Status Display LED Biasing Protection Circuitry The LED should be biased with as little current as neces- sary to create reasonable illumination; therefore, a bal- Programmable Timer Function last resistor should be placed between the LED cathode The AAT3663 contains a watchdog timing circuit to shut and the STAT pin. LED current consumption will add to down charging functions in the event of a defective bat- the overall thermal power budget for the device pack- tery cell not accepting a charge over a preset period of age, hence it is good to keep the LED drive current to a time. Typically, a 0.1μF ceramic capacitor is connected minimum. 2mA should be sufficient to drive most low- between the CT pin and ground. When a 0.1μF ceramic cost green or red LEDs. It is not recommended to exceed capacitor is used, the device will time out a shutdown 8mA for driving an individual status LED. condition if the trickle charge mode exceeds 25 minutes The required ballast resistor values can be estimated and a combined trickle charge plus constant current using the following formula: mode of 3 hours. When the device transitions to the constant voltage mode, the timing counter is reset and (V - V ) will time out after an additional 3 hours if the charge R = IN F(LED) BALLAST I current does not drop to the charge termination level. LED The AAT3663 has a battery fault detector, which, when Example: used in conjunction with a 0.1μF capacitor on the CT pin, outputs a 1Hz signal with 50% duty cycle at the STAT1 (5.0V - 2.0V) pin in the event of a timeout while in the trickle charge RBALLAST = 2mA = 1.5kΩ mode. Note: Red LED forward voltage (V ) is typically 2.0V @ F Mode Time 2mA. Trickle Charge (TC) Time Out 25 minutes Trickle Charge (TC) + Constant Current (CC) 3 hours Digital Thermal Loop Control Mode Time Out Constant Voltage (CV) Mode Time Out 3 hours Due to the integrated nature of the linear charging con- trol pass device for the adapter mode, a special thermal Table 3: Summary for a 0.1μF Ceramic Capacitor loop control system has been employed to maximize Used for the Timing Capacitor. charging current under all operation conditions. The thermal management system measures the internal cir- The CT pin is driven by a constant current source and cuit die temperature and reduces the fast charge current will provide a linear response to increases in the timing when the device exceeds a preset internal temperature capacitor value. Thus, if the timing capacitor were to be control threshold. Once the thermal loop control becomes doubled from the nominal 0.1μF value, the timeout peri- active, the fast charge current is initially reduced by a ods would be doubled. If the programmable watchdog Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 17 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications timer function is not needed, it can be disabled by ter- which are typically integrated into the battery package. minating the CT pin to ground. The CT pin should not be The voltage on the TS pin resulting from the resistive left floating or unterminated, as this will cause errors in load and applied current, should stay within a window the internal timing control circuit. The constant current bounded by the TS1 and TS2 specification thresholds. provided to charge the timing capacitor is very small, Refer to the Electrical Characteristics table for the TS1 and this pin is susceptible to noise and changes in capac- and TS2 limits for a selected AAT3663 option. If the bat- itance value. Therefore, the timing capacitor should be tery becomes too hot during charge cycle due to an physically located on the printed circuit board layout as internal fault or excessive charge current, the NTC close as possible to the CT pin. Since the accuracy of the thermistor will heat up and reduce in value. This in turn internal timer is dominated by the capacitance value, a will pull the TS pin voltage below than the TS1 threshold, 10% tolerance or better ceramic capacitor is recom- and indicate a battery cell temperature fault. The charg- mended. Ceramic capacitor materials, such as X7R and ing process will then be suspended until the over-tem- X5R types, are a good choice for this application. perature condition is removed, at which time charging will resume. Conversely, if the battery under charge is Over-Voltage Protection exposed to extreme cold ambient temperature condition, An over-voltage event is defined as a condition where the NTC thermistor may increase in value and push the the voltage on the BAT pin exceeds the maximum bat- voltage on the TS pin above the TS2 threshold. In such tery charge voltage and is set by the overvoltage protec- a case, the charge cycle will be suspended and will not tion threshold (V ). If an over-voltage condition occurs, resume until the cold fault condition is removed. Both OVP the AAT3663 charge control will shut down the device TS1 and TS2 temperature fault conditions will be report until the voltage on the BAT pin drops below V . The by the STAT1 and STAT2 LEDs. OVP AAT3663 will resume normal charging operation after AAT3663-1 Option the overvoltage condition is removed. During an over- voltage event, the STAT LEDs will report a system fault. the AAT3663-1 option utilizes an internal battery tem- perature sensing system comprised of two comparators Over-Temperature Shutdown which establish a voltage window for safe operation. The thresholds for the TS operating window are bounded by The AAT3663 has a thermal protection control circuit the TS1 and TS2 specifications. Referring to the electri- which will shut down charging functions once the internal cal characteristics table in this datasheet, the TS1 die temperature exceeds the over-temperature shut- threshold = 0.30 · V and the TS2 threshold = 0.6 · V . IN IN down threshold. Once the internal die temperature falls Refer to Figure 4 for external resistor and NTC thermis- below the hysteresis, normal operation will resume the tor connections. previous charging state. If the use of the battery temperature sense function is not required, it may be disabled by terminating the TS Battery Temperature Fault Monitoring pin to IN and ground using a 10kW resistor divider net- There are two AAT3663 temperature sense options, The work. If circuit power dissipation is a concern, the two AAT3663-1 and AAT3663-2. The AAT3663-1 option terminating resistor values may be increased to 100kW. allows of the use of any NTC resistor. For ease of use, the AAT3663-2 Option AAT3663-2 option is factory set to function with typical 10kW NTC resistors and eliminates the need for a resistor Most of the commonly used NTC thermistors in Li-Ion/ divider pull up to the input power source. Polymer battery packs are approximately 10kΩ at room temperature (25°C). The AAT3663-2 TS pin has been Regardless of the AAT3663 option selected, the internal specifically designed to source 75µA of current to the system control checks battery temperature before start- 10kW NTC thermistor. The applied constant current ing the charge cycle and continues to monitor the bat- source and fixed internal TS1 and TS2 voltage thresholds tery temperature during all stages of the charging cycle. eliminate the need for a resistor divider on the TS pin. This is accomplished by monitoring the voltage at the TS Simply connect the 10kW NTC resistor between the TS pin. In general, the system is intended for use with pin and ground. If the TS function is not needed for the negative temperature coefficient thermistors (NTC) AAT3663-2, it may be left open (not connected). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 18 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications VIN IN AAT3663-4.2-1 or AAT3663-8.4-1 RT 0.6xVIN Battery Cold Fault TS Battery Pack Battery Hot Fault RNTC T 0.30xVIN Figure 4: External Resistor and NTC Thermistor Application Circuit. Thermal Considerations 2.50 The AAT3663 is offered in a 3x3mm TDFN package which 2.00 can provide up to 2.0W of power dissipation when it is properly bonded to a printed circuit board and has a W) 1.50 maximum thermal resistance of 50°C/W. Many consider- (X) A ations should be taken into account when designing the D(M 1.00 P printed circuit board layout, as well as the placement of 0.50 the charger IC package in proximity to other heat gener- ating devices in a given application. The ambient tem- 0.00 perature around the charger IC will also have an effect on 0 25 50 75 100 the thermal limits of the battery charging operation. The T (°C) A maximum limits that can be expected for a given ambient condition can be estimated by the following discussion. Figure 5: Maximum Power Dissipation Before Entering Thermal Loop. First, the maximum power dissipation for a given situa- Next, the power dissipation can be calculated by the fol- tion should be calculated: lowing equation: (T - T ) (P - V · I ) P = J A I = D(MAX) IN OP D(MAX) θ CH(MAX) V - V JA IN BAT Where: (T - T ) J A - V · I P = Maximum Power Dissipation (W) IN OP D(MAX) θ I = JA θJA = Package Thermal Resistance (°C/W) CH(M A X ) V - V IN BAT T = Thermal Loop Entering Threshold (ºC) [115ºC] J TA = Ambient Temperature (°C) Where: Figure 5 shows the relationship between maximum P = Total Power Dissipation by the Device D power dissipation and ambient temperature of AAT3663 V = Input Voltage IN V = Battery Voltage as Seen at the BAT Pin BAT I = Constant Charge Current Programmed for the CH Application Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 19 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications I = Quiescent Current Consumed by the Charger IC Capacitor Selection OP for Normal Operation [0.5mA] Input Capacitor By substitution, we can derive the maximum charge cur- In general, it is a good design practice to place a decou- rent before reaching the thermal limit condition which pling capacitor between the IN pin and ground. An input will activate digital thermal loop operation. The maxi- capacitor in the range of 1μF to 22μF is recommended. mum charge current is the key factor when designing If the source supply is unregulated, it may be necessary battery charger applications. to increase the capacitance to keep the input voltage In general, the worst case condition is when the greatest above the under-voltage lockout threshold during device input to output voltage drop occurs across the charger enable and when battery charging is initiated. If the IC. Specifically when battery voltage is charged up just AAT3663’s input is to be used in a system with an exter- above the preconditioning voltage threshold and the nal power supply source, such as a typical AC-to-DC wall charger enters into the constant current fast charging adapter, then a C capacitor in the range of 10μF should IN mode. Under this condition, the device will suffer the be used. A larger input capacitor in this application will maximum possible power dissipation since both the volt- minimize switching or power transient effects when the age difference across the device and the charge current power supply is “hot plugged” in. will be at their respective maximums. Figure 6 shows the safe fast charge current operating region for differ- Output Capacitor ent ambient temperatures. Exceeding these limits will The AAT3663 only requires a 1μF ceramic capacitor on drive the charge control into digital thermal loop opera- the BAT pin to maintain circuit stability. This value should tion. When under digital thermal loop operation, the be increased to 10μF or more if the battery connection is device will remain active and continue to charge the bat- made any distance from the charger output. If the tery at a reduced current level for the given ambient AAT3663 is to be used in applications where the battery condition. can be removed from the charger, such as desktop charging cradles, an output capacitor 10μF or greater is 1000 recommended to reduce the effect of the charger cycling 800 on and off when no battery is present. T = 85°C T = 60°C A) A A m 600 T = 45°C (X) AT = 25°C Printed Circuit Board A A Layout Considerations M 400 C( C I For the best results, it is recommended to physically place 200 the battery pack as close as possible to the AAT3663 BAT 0 pin. To minimize voltage drops on the PCB, keep the high 4 5 6 7 8 9 10 11 12 13 current carrying traces adequately wide. For maximum VIN (V) power dissipation of the AAT3663 3 × 3mm 14-pin TDFN package, the metal substrate should be solder bonded to Figure 6: Maximum Charging Current Before the the board. It is also recommended to maximize the sub- Digital Thermal Loop Becomes Active. strate contact to the PCB ground plane layer to further increase local heat dissipation. Refer to the AAT3663 evaluation board for a good layout example. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 20 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Figure 7: AAT3663 Evaluation Board Figure 8: AAT3663 Evaluation Board Top (Component) Side Layout. Bottom Side Layout. JP1 ENABLE JP4 VIN Green Red Red LEDD3 LED D2 LED D1 U1 R7 (see note) TDFN33-14 AAT3663 JP3 1 EN TS 5 TS R4 2k 12 ADPP# JP2 R52k 11 STAT1 TERM 13 VIN R62k 10 STAT2 BATS 6 BAT 4V - 13.2V 8 IN BAT 7 9 IN ISET 3 R3 C102µF C1 4 GND EP CT 2 R2 10k 10µF R1 10k C3 1.74k GND 0.1µF GND C1 1206 X7R 10µF 16V GRM31CR71C106KAC7L C2 0805 X7R 10µF 10V GRM21BR71A106KE51L Note: R2 = 10k is set the termination current, 7.5% from the constant charging current R7 = 10k (for -1 option) R7 = open (for -2 option) Figure 9: AAT3663 Evaluation Board Schematic Diagram. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 21 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Ordering Information Battery Cell Voltage Option Battery Temperature Sense Package Marking1 Part Number (Tape and Reel)2 Single Cell (4.2V) For Use With Any NTC Thermistor TDFN33-14 1XXYY AAT3663IWO-4.2-1-T1 Single Cell (4.2V) For Use With 10kΩ NTC Thermistor TDFN33-14 ZZXYY AAT3663IWO-4.2-2-T1 Dual Cell (8.4V) For Use With Any NTC Thermistor TDFN33-14 1YXYY AAT3663IWO-8.4-1-T1 Dual Cell (8.4V) For Use With 10kΩ NTC Thermistor TDFN33-14 1ZXYY AAT3663IWO-8.4-2-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 22 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012

DATA SHEET AAT3663 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications Package Information TDFN33-14 Detail "A" Index Area 3.000 0.050± 2.500 0.050± 3.000 ± 0.050 1.650 ± 0.050 Top View Bottom View 0.425 ± 0.050 0.750 0.050± 0.000 +- 00..100000 0.203 REF BSC Side View Pin 1( OInpdtiicoantaolr) 0.400 0.180 0.050± Detail "A" All dimensions in millimeters. 1. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection. Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Sky- works may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here- under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN- CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en- vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of pub- lished parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 23 201878C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 11, 2012