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  • 型号: FPF2125
  • 制造商: Fairchild Semiconductor
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ICGOO电子元器件商城为您提供FPF2125由Fairchild Semiconductor设计生产,在icgoo商城现货销售,并且可以通过原厂、代理商等渠道进行代购。 FPF2125价格参考。Fairchild SemiconductorFPF2125封装/规格:PMIC - 配电开关,负载驱动器, 。您可以下载FPF2125参考资料、Datasheet数据手册功能说明书,资料中有FPF2125 详细功能的应用电路图电压和使用方法及教程。

产品参数 图文手册 常见问题
参数 数值
产品目录

集成电路 (IC)半导体

描述

IC LOAD SWITCH ADVANCED SOT23电源开关 IC - 配电 ADV LOAD MANAGEMENT

产品分类

PMIC - 电源分配开关开关 IC

品牌

Fairchild Semiconductor

产品手册

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产品图片

rohs

符合RoHS无铅 / 符合限制有害物质指令(RoHS)规范要求

产品系列

电源开关 IC - 配电,Fairchild Semiconductor FPF2125IntelliMax™

数据手册

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产品型号

FPF2125

PCN封装

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PCN设计/规格

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Rds(On)

160 毫欧

上升时间

12 us

下降时间

200 us

产品

Load Switches

产品目录页面

点击此处下载产品Datasheet

产品种类

电源开关 IC - 配电

供应商器件封装

SOT-23-5

其它名称

FPF2125DKR

内部开关

包装

Digi-Reel®

单位重量

30 mg

商标

Fairchild Semiconductor

安装类型

表面贴装

安装风格

SMD/SMT

导通电阻—最大值

160 mOhms

封装

Reel

封装/外壳

SC-74A,SOT-753

封装/箱体

SOT-23-5

工作温度

-40°C ~ 85°C

工作电源电压

1.8 V to 5.5 V

工厂包装数量

3000

开关数量

1

最大功率耗散

667 mW

最大工作温度

+ 85 C

最大输入电压

5.5 V

最小工作温度

- 40 C

最小输入电压

1.8 V

标准包装

1

电压-输入

1.8 V ~ 5.5 V

电流限制

可调

电源电压-最大

5.5 V

电源电压-最小

1.8 V

空闲时间—最大值

70 us

类型

高端开关

系列

FPF2125

输出数

1

输出电流

0.6 A

输出端数量

1 Output

运行时间—最大值

25 us

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PDF Datasheet 数据手册内容提取

Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore (_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild_questions@onsemi.com. ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

F P F 2 1 October 2008 2 3 - FPF2123-FPF2125 F P tm F IntelliMAX™ Advanced Load Management Products 2 1 2 5 Features General Description I n (cid:1) 1.8 to 5.5V Input Voltage Range The FPF2123, FPF2124, and FPF2125 are a series of load te l (cid:1) Controlled Turn-On switches which provide full protection to systems and loads li M (cid:1) 0.15-1.5A Adjustable Current Limit which may encounter large current conditions. These devices A contain a 0.125(cid:2) current-limited P-channel MOSFET which can (cid:1) Undervoltage Lockout X operate over an input voltage range of 1.8-5.5V. The current ™ (cid:1) Thermal Shutdown limit is settable using an external resistor. Internally, current is (cid:1) <2(cid:1)A Shutdown Current prevented from flowing when the MOSFET is off and the output A (cid:1) Auto Restart voltage is higher than the input voltage. Switch control is by a dv (cid:1) Fast Current limit Response Time logic input (ON) capable of interfacing directly with low voltage a control signals. Each part contains thermal shutdown protection n (cid:1) 3(cid:1)s to Moderate Over Currents c which shuts off the switch to prevent damage to the part when a e (cid:1) Fault Blanking continuous over-current condition causes excessive heating. d (cid:1) Reverse Current Blocking L When the switch current reaches the current limit, the parts o (cid:1) RoHS Compliant operate in a constant-current mode to prohibit excessive a d Applications currents from causing damage. For the FPF2123 and FPF2124 M if the constant current condition still persists after 10ms, these a (cid:1) PDAs parts will shut off the switch. The FPF2123 has an auto-restart n feature which will turn the switch on again after 160ms if the ON a (cid:1) Cell Phones g pin is still active. The FPF2124 does not have this auto-restart (cid:1) GPS Devices feature so the switch will remain off after a current limit fault until em (cid:1) MP3 Players the ON pin is cycled. The FPF2125 will not turn off after a e (cid:1) Digital Cameras current limit fault, but will rather remain in the constant current n t (cid:1) Peripheral Ports mode indefinitely. The minimum current limit is 150mA. P r (cid:1) Hot Swap Supplies These parts are available in a space-saving 5 pin SOT23 o package d u c Typical Application Circuit t s TO LOAD VIN VOUT FPF2123 - FPF2125 OFF ON ON ISET GND Ordering Information Current Limit Auto-Restart Current Limit ON Pin Part Blanking Time Time Top Mark [A] Activity [ms] [ms] FPF2123 0.15 - 1.5 5/10/20 80/160/320 Active HI 2123 FPF2124 0.15 - 1.5 5/10/20 NA Active HI 2124 FPF2125 0.15 - 1.5 Infinite NA Active HI 2125 ©2008 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Functional Block Diagram F 2 1 2 3 - F V IN P F 2 1 2 UVLO 5 I n REVERSE te ON CONTROL l LOGIC CURRENT liM BLOCKING A X ™ CURRENT LIMIT A d v THERMAL VOUT a SHUTDOWN n ISET c e d L o a d GND M a n a g e m e n t Pin Configuration P r o d u VIN 1 5 VOUT c t s GND 2 ON 3 4 ISET SOT23-5 Pin Description Pin Name Function 1 V Supply Input: Input to the power switch and the supply voltage for the IC IN 2 GND Ground 3 ON ON Control Input 4 ISET Current Limit Set Input: A resistor from ISET to ground sets the current limit for the switch. 5 V Switch Output: Output of the power switch OUT 2 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Absolute Maximum Ratings F 2 1 Parameter Min. Max. Unit 2 3 VIN, VOUT, ON, ISET to GND -0.3 6 V -F P Power Dissipation @ TA = 25°C (note 1) 667 mW F 2 Operating Temperature Range -40 125 °C 1 2 Storage Temperature -65 150 °C 5 Thermal Resistance, Junction to Ambient 150 °C/W I n HBM 4000 V te Electrostatic Discharge Protection l MM 400 V li M A Recommended Operating Range X ™ Parameter Min. Max. Unit A d VIN 1.8 5.5 V v a Ambient Operating Temperature, TA -40 85 °C n c e d Electrical Characteristics L V = 1.8 to 5.5V, T = -40 to +85°C unless otherwise noted. Typical values are at V = 3.3V and T = 25°C. o IN A IN A a Parameter Symbol Conditions Min. Typ. Max Units d M Basic Operation a Operating Voltage V 1.8 5.5 V n IN a I = 0mA V = 1.8 to 3.3V 75 g Quiescent Current I OUT IN (cid:1)A e Q V = 3.3 to 5.5V 80 120 m IN e Shutdown Current ISHDN 2 (cid:1)A n t Reverse Block Leakage Current IBLOCK 1 (cid:1)A P r Latch-Off Current ILATCHOFF FPF2124 50 (cid:1)A o d VIN = 3.3V, IOUT = 50mA, TA = 25°C 125 160 u c On-Resistance RON VIN = 3.3V, IOUT = 50mA, TA = 85°C 150 200 m(cid:2) ts V = 3.3V, I = 50mA, T = -40°C to +85°C 65 200 IN OUT A V = 1.8V 0.75 IN ON Input Logic High Voltage (ON) V V IH V = 5.5V 1.30 IN V = 1.8V 0.5 IN ON Input Logic Low Voltage V V IL V = 5.5V 1.0 IN ON Input Leakage V = V or GND 1 (cid:1)A ON IN Off Switch Leakage I V = 0V, V = 0V 1 (cid:1)A SWOFF ON OUT Protections V = 3.3V, V = 3.0V, Current Limit I IN OUT 600 800 1000 mA LIM RSET=576(cid:2) Min. Current Limit I V = 3.3V, V = 3.0V 150 mA LIM(min.) IN OUT Shutdown Threshold 140 Thermal Shutdown Return from Shutdown 130 °C Hysteresis 10 Under Voltage Shutdown UVLO V Increasing 1.5 1.6 1.7 V IN Under Voltage Shutdown 50 mV Hysteresis 3 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Electrical Characteristics Cont. F 2 1 V = 1.8 to 5.5V, T = -40 to +85°C unless otherwise noted. Typical values are at V = 3.3V and T = 25°C. 2 IN A IN A 3 Parameter Symbol Conditions Min. Typ. Max Units - F P Dynamic F 2 Turn on time t R = 500(cid:2), C = 0.1(cid:1)F 25 (cid:1)s ON L L 1 2 Turn off time tOFF RL = 500(cid:2), CL = 0.1(cid:1)F 70 (cid:1)s 5 VOUT Rise Time tR RL = 500(cid:2), CL = 0.1(cid:1)F 12 (cid:1)s In VOUT Fall Time tF RL = 500(cid:2), CL = 0.1(cid:1)F 200 (cid:1)s te l Over Current Blanking Time tBLANK FPF2123, FPF2124 5 10 20 ms liM FPF2123 80 160 320 A Auto-Restart Time tRESTART ms X FPF2124, FPF2125 NA ™ VIN = VON = 3.3V. Moderate 3 (cid:1)s A Short Circuit Response Time Over-Current Condition. d v V = V = 3.3V. Hard Short. 20 (cid:1)s IN ON a n c Note 1: Package power dissipation on 1square inch pad, 2 oz. copper board. e d L o a d M a n a g e m e n t P r o d u c t s 4 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Typical Characteristics F 2 1 2 3 76 95 - VON = VIN F 74 P 85 F A) A) 2 LY CURRENT (u677802 LY CURRENT (u6755 VIN = 5.5V VIN = 3.3V VIN = 1.8V 125 Int P P e SUP66 SUP55 lliM 64 A 62 45 X 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 -40 -15 10 35 60 85 ™ SUPPLY VOLTAGE (V) TJ, JUNCTION TEMPERATURE (oC) A d Figure 1. Quiescent Current vs. Input Voltage Figure 2. Quiescent Current vs. Temperature v a n c e d L o a d 2400 500 M 450 2100 a 400 n ENT (nA)11580000 VIN = 5.5V ENT (nA)330500 VIN = 5.5V age R R m CUR1200 CUR250 e SUPPLY 690000 VIN = 3.3V SUPPLY 112050000 nt Pr 300 50 VIN = 3.3V od u 0 0 c -40 -15 10 35 60 85 -40 -15 10 35 60 85 t s TJ, JUNCTION TEMPERATURE (oC) TJ, JUNCTION TEMPERATURE (oC) Figure 3. I Current vs. Temperature Figure 4. I Current vs. Temperature SHUTDOWN SWITCH-OFF 0.21 1.4 0.18 1.2 A) A) NT (u0.15 NT (u1.0 VIN = 5.5V RE0.12 RE0.8 R R U U Y C0.09 Y C0.6 PL PL UP0.06 UP0.4 S S VIN = 3.3V 0.03 0.2 0.00 0.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -40 -15 10 35 60 85 SUPPLY VOLTAGE (V) TJ, JUNCTION TEMPERATURE (oC) Figure 5. Reverse Current vs. V Figure 6. Reverse Current vs. Temperature OUT 5 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Typical Characteristics F 2 1 2 3 52.0 900 - VIN - VOUT = 0.3V F RSET = 576(cid:152) P RENT (uA)5511..05 RENT (mA)882600 F2125 PLY CUR5500..05 PUT CUR780 Inte SUP49.5 OUT740 lliM A 49.0 700 X -40 -15 10 35 60 85 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 ™ TJ, JUNCTION TEMPERATURE ((cid:136)(cid:136)(cid:136)(cid:136)C) VIN, INPUT VOLTAGE (V) A d Figure 7. I Current vs. Temperature Figure 8. Current Limit vs. Input Voltage v LATCH-OFF a n c e d L o 900 1800 a d RSET = 576( A)860 A)1500 Ma ENT (m820 ENT (m1200 nag R R CUR CUR 900 em TPUT 780 TPUT 600 en U U t O740 O 300 P r o 700 0 d -40 -15 10 35 60 85 200 800 1400 2000 2600 3200 u c TJ, JUNCTION TEMPERATURE (oC) RSET (Ohms) ts Figure 9. Current Limit vs. Temperature Figure 10. Current Limit vs. Rest 1.4 170 1.2 160 V)1.0 150 ESHOLD (0.8 mOhms) 140 ON THR00..46 R (ON112300 0.2 110 0.0 100 1 2 3 4 5 6 1 2 3 4 5 6 VIN, Input Voltage (V) VIN, Input Voltage (V) Figure 11. V vs. V Figure 12. R vs. V IH IN ON IN 6 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Typical Characteristics F 2 1 2 3 200 100 - F P 180 VIN = 1.8V uS) TOFF F2 160 S ( 1 R (mOhms)ON111024000 VIN = 3.3V VIN = 5.5V TURN-ON/OFF TIME VRCILON U ==T 5=30 .030.V 1OuhFms TON 25 IntelliM 80 A 60 10 X -40 -15 10 35 60 85 -40 -15 10 35 60 85 ™ TJ, JUNCTION TEMPERATURE (oC) TJ, JUNCTION TEMPERATURE (oC) A d Figure 13. R vs. Temperature Figure 14. T /T vs. Temperature v (ON) ON Off a n c e d L o 1000 14 a d TFALL 13 M S) S) a MES (u 100 ME (m12 nag E / FALL TI 10 TRISE ANKING TI1101 emen RIS VRILN == 530.30V Ohms BL 9 t P COUT = 0.1uF ro 1 8 d -40 -15 10 35 60 85 -40 -15 10 35 60 85 u c TJ, JUNCTION TEMPERATURE (oC) TJ, JUNCTION TEMPERATURE (oC) ts Figure 15. T /T vs. Temperature Figure 16. T vs. Temperature RISE FALL BLANK 200 190 VDRV2 VIN = 3.3V mS)180 2V/DIV RL = 2.2(cid:2) E (170 CIN = 10(cid:1)F M V T TI160 2V/ODUIVT COUT = 0.1(cid:1)F R TA150 S E R140 130 I OUT 400mA/DIV 120 -40 -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) Figure 17. T vs. Temperature Figure 18. T Response RESTART BLANK 7 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Typical Characteristics F 2 1 2 3 - F VDRV2 VIN = 3.3V VON VIN = 3.3V PF 2V/DIV RL = 2.2(cid:2) 2V/DIV RL = 500(cid:2) 21 CIN = 10(cid:1)F CIN = 10(cid:1)F 2 VOUT COUT = 0.1(cid:1)F COUT = 0.1(cid:1)F 5 2V/DIV IOUT In 10mA/DIV t e l l i I M OUT 400mA/DIV A X ™ A d Figure 19. TRESTART Response Figure 20. TON Response v a n c e d L o a d VON VIN = 3.3V VIN M 2V/DIV 2V/DIV a RL = 500(cid:2) C = 10(cid:1)F n C = 10(cid:1)F IN a CIN = 0.1(cid:1)F COUT = 0.1(cid:1)F g OUT e m I I e OUT OUT n 10mA/DIV 4A/DIV t P V OUT r 2V/DIV o d u c t s Figure 21. T Response Figure 22. Short Circuit Response OFF (Output Shorted to GND) V IN 2V/DIV C = 10(cid:1)F IN R = 2.2(cid:2) VIN=VON COUT = 0.1(cid:1)F CL = 10(cid:1)F 2V/DIV IN VON COUT = 0.1(cid:1)F 2V/DIV I OUT 400mA/DIV I OUT 400mA/DIV Figure 23. Current Limit Response Figure 24. Current Limit Response (Switch power up to hard short) (Output Shorted to GND by 2.2(cid:2), moderate short) Note 2: V signal forces the device to go into overcurrent condition by loading a 2.2(cid:2) resistor. DRV 8 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Description of Operation F 2 Under-Voltage Lockout 1 The FPF2123, FPF2124, and FPF2125 are current limited 2 switches that protect systems and loads which can be damaged The under-voltage lockout turns-off the switch if the input 3 voltage drops below the under-voltage lockout threshold. With - or disrupted by the application of high currents. The core of F the ON pin active, the input voltage rising above the P each device is a 0.125(cid:2) P-channel MOSFET and a controller under-voltage lockout threshold will cause a controlled turn-on F capable of functioning over a wide input operating range of 2 1.8-5.5V. The controller protects against system malfunctions of the switch which limits current over-shoots. 1 2 through current limiting under-voltage lockout and thermal 5 shutdown. The current limit is adjustable from 150mA to 1.5A Thermal Shutdown through the selection of an external resistor. The thermal shutdown protects the die from internally or In externally generated excessive temperatures. During an te over-temperature condition the switch is turned-off. The switch ll On/Off Control automatically turns-on again if the temperature of the die drops iM The ON pin controls the state of the switch. When ON is high, below the threshold temperature. A the switch is in the on state. Activating ON continuously holds X ™ the switch in the on state so long as there is no fault. For all versions, an under-voltage on VIN or a junction temperature in A excess of 140°C overrides the ON control to turn off the switch. d In addition, excessive currents will cause the switch to turn off in v a the FPF2123 and FPF2124. The FPF2123 has an Auto-Restart n feature which will automatically turn the switch on again after c e 160ms. For the FPF2124, the ON pin must be toggled to turn-on d the switch again. The FPF2125 does not turn off in response to L an over current condition but instead remains operating in a o a constant current mode so long as ON is active and the thermal d shutdown or under-voltage lockout have not activated. M The ON pin control voltage and V pin have independent a IN n recommended operating ranges. The ON pin voltage can be a driven by a voltage level higher than the input voltage. g e m Current Limiting e The current limit ensures that the current through the switch n t doesn't exceed a maximum value while not limiting at less than P a minimum value. The current at which the parts will limit is r o adjustable through the selection of an external resistor d connected to ISET. Information for selecting the resistor is found u in the Application Info section. The FPF2123 and FPF2124 c t have a blanking time of 10ms, nominally, during which the s switch will act as a constant current source. At the end of the blanking time, the switch will be turned-off. The FPF2125 has no current limit blanking period so it will remain in a constant current state until the ON pin is deactivated or the thermal shutdown turns-off the switch. 9 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Application Information F 2 1 Typical Application 2 3 - F P F 2 VIN VOUT 1 2 FPF2123- FPF2125 5 I OFF ON ON ISET R2=110(cid:2) n B 5a.t5teVry 5.5V MAX GND C2=0.1(cid:1)F tell C1=4.7(cid:1)F R iM SET A X ™ A d v Setting Current Limit Current Limit Various R Values a SET n The FPF2123, FPF2124, and FPF2125 have a current limit R Min. Current Typ. Current Max. Current c SET e which is set with an external resistor connected between ISET [(cid:2)] Limit Limit Limit d and GND. This resistor is selected by using the following [mA] [mA] [mA] L equation, o 309 1120 1490 1860 a RSET = 4-I--L-6-I--M0--- 340 1010 1350 1690 d M R is in Ohms and that of I is Amps 374 920 1230 1540 a SET LIM n The table below can also be used to select RSET. A typical 412 840 1120 1400 a application would be the 500mA current that is required by a g single USB port. Using the table below an appropriate selection 453 760 1010 1270 e m for the RSET resistor would be 604(cid:2). This will ensure that the 499 690 920 1150 e port load could draw 570mA, but not more than 950mA. 549 630 840 1050 n Likewise for a dual port system, an R of 340(cid:2) would always t SET deliver at least 1120mA and never more than 1860mA. 576 600 800 1000 P r o 604 570 760 950 d Input Capacitor 732 470 630 790 u To limit the voltage drop on the input supply caused by transient c t in-rush currents when the switch turns-on into a discharged load 887 390 520 650 s capacitance or a short-circuit, a capacitor needs to be placed 1070 320 430 540 between V and GND. A 4.7(cid:1)F ceramic capacitor, C , must be IN IN 1300 260 350 440 placed close to the V pin. A higher value of C can be used to IN IN further reduce the voltage drop experienced as the switch is 1910 180 240 300 turned on into a large capacitive load. 3090 110 150 190 Output Capacitor A 0.1(cid:1)F capacitor, C , should be placed between V and Power Dissipation OUT OUT GND. This capacitor will prevent parasitic board inductances During normal operation as a switch, the power dissipated in the from forcing V below GND when the switch turns-off. For the part will depend upon the level at which the current limit is set. OUT FPF2123 and FPF2124, the total output capacitance needs to The maximum allowed setting for the current limit is 1.5A and be kept below a maximum value, C , to prevent the part this will result in a typical power dissipation of, OUT(max) from registering an over-current condition and turning-off the P=(I )2·R = (1.5)2·0.125 = 281mW switch. The maximum output capacitance can be determined LIM ON from the following formula, If the part goes into current limit the maximum power dissipation will occur when the output is shorted to ground. For the FPF2123 the power dissipation will scale by the Auto-Restart COUT(max) = I--L---I--M----(--m------i-n----)----·-V---t--B---L---A---N----K---(---m-----i--n-----) Time, tRESTART, and the Over Current Blanking Time, tBLANK, so IN that the maximum power dissipated is, t (max) P(max)= --------------------------B---L--A----N---K-------------------------------------------·V (max)·I (max) (4) t (min)+t (max) IN LIM RESTART BLANK 20 = -------------------·5.5·1.5 = 1.65W 80+20 10 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P This is more power than the package can dissipate, but the F thermal shutdown of the part will activate to protect the part from 2 damage due to excessive heating. When using the FPF2124, 1 2 attention must be given to the manual resetting of the part. 3 Continuously resetting the part when a short on the output is -F present will cause the temperature of the part to increase. The P junction temperature will only be able to increase to the thermal F 2 shutdown threshold. Once this temperature has been reached, 1 toggling ON will not turn-on the switch until the junction 2 5 temperature drops. For the FPF2125, a short on the output will cause the part to operate in a constant current state dissipating In a worst case power of, t e P(max) = VIN·(max)·ILIM(max) (5) lliM = 5.5·1.5 = 8.25W A This large amount of power will activate the thermal shutdown X ™ and the part will cycle in and out of thermal shutdown so long as the ON pin is active and the short is present. A d v a Board Layout n c For best performance, all traces should be as short as possible. e To be most effective, the input and output capacitors should be d placed close to the device to minimize the effects that parasitic L o trace inductances may have on normal and short-circuit a operation. Using wide traces for VIN, VOUT and GND will help d minimize parasitic electrical effects along with minimizing the M case to ambient thermal impedance. a n a g e m e n t P r o d u c t s 11 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P Dimensional Outline and Pad Layout F 2 1 2 3 - F P F 2 1 2 5 I n t e l l i M A X ™ A d v a n c e d L o a d M a n a g e m e n t P r o d u c t s 12 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

F P F 2 1 2 3 - F P TRADEMARKS F 2 The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidianries, and is 1 not intended to be an exhaustive list of all such trademarks. 2 5 Build it Now™ FRFET® Programmable Active Droop™ The Power Franchise® CorePLUS™ Global Power ResourceSM QFET® I n CorePOWER™ Green FPS™ QS™ t CROSSVOLT™ Green FPS™ e-Series™ Quiet Series™ e CTL™ GTO™ RapidConfigure™ TinyBoost™ ll CEcuorrSePntA TRrKan®sfer Logic™ IInStOelPliMLAANXA™R™ ™ TTTiiInnNyyYBLOougPcikTc™®O™ iMA EfficentMax™ MegaBuck™ Saving our world, 1mW at a time™ TinyPower™ X EZSWITCH™ * MICROCOUPLER™ Saving our world, 1W at a time™ TinyPWM™ ™ ™ MicroFET™ Saving our world, 1kW at a time™ MicroPak™ SmartMax™ TmSineyrWDieres™™ A MillerDrive™ SMART START™ d MotionMax™ SPM® v Fairchild® Motion-SPM™ STEALTH™ a Fairchild Semiconductor® OPTOLOGIC® SuperFET™ UHC® n FACT Quiet Series™ OPTOPLANAR® SuperSOT™-3 Ultra FRFET™ c FACT® ® SuperSOT™-6 UniFET™ e d FAST® SuperSOT™-8 VCX™ FastvCore™ PDP SPM™ SupreMOS™ VisualMax™ L FFlPaSsh™Writer® * PPoowweerr-TSrePnMc™h® SyncFET™ ® oad F-PFS™ M * EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor. a n DISCLAIMER a FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE g RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY e m PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY e THEREIN, WHICH COVERS THESE PRODUCTS. n t P LIFE SUPPORT POLICY r o FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. d u As used herein: c 1. Life support devices or systems are devices or systems which, (a) are 2. A critical component in any component of a life support, device, or ts intended for surgical implant into the body or (b) support or sustain life, system whose failure to perform can be reasonably expected to cause and (c) whose failure to perform when properly used in accordance with the failure of the life support device or system, or to affect its safety or instructions for use provided in the labeling, can be reasonably effectiveness. expected to result in a significant injury of the user. ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation’s Anti-Counterfeiting Policy. Farichild’s Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed application, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Farichild strongly encourages customers to purchase Farichild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild’s quality standards for handing and storage and provide access to Farichild’s full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address and warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Farichild is committed to committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Datasheet contains the design specifications for product development. Specifications may change Advance Information Formative / In Design in any manner without notice. Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Preliminary First Production Semiconductor reserves the right to make changes at any time without notice to improve design. Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make No Identification Needed Full Production changes at any time without notice to improve the design. Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. Obsolete Not In Production The datasheet is for reference information only. Rev. I36 13 www.fairchildsemi.com FPF2123-FPF2125 Rev. F

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