MIC4426/4427/4428 Micrel, Inc. MIC4426/4427/4428 Dual 1.5A-Peak Low-Side MOSFET Driver General Description Features The MIC4426/4427/4428 family are highly-reliable dual low- • Bipolar/CMOS/DMOS construction side MOSFET drivers fabricated on a BiCMOS/DMOS process • Latch-up protection to >500mA reverse current for low power consumption and high efficiency. These drivers • 1.5A-peak output current translate TTL or CMOS input logic levels to output voltage • 4.5V to 18V operating range levels that swing within 25mV of the positive supply or ground. • Low quiescent supply current Comparable bipolar devices are capable of swinging only 4mA at logic 1 input to within 1V of the supply. The MIC4426/7/8 is available in 400µA at logic 0 input three configurations: dual inverting, dual noninverting, and • Switches 1000pF in 25ns one inverting plus one noninverting output. • Matched rise and rall times • 7Ω output impedance The MIC4426/4427/4428 are pin-compatible replacements • <40ns typical delay for the MIC426/427/428 and MIC1426/1427/1428 with im- • Logic-input threshold independent of supply voltage proved electrical performance and rugged design (Refer to • Logic-input protection to –5V the Device Replacement lists on the following page). They • 6pF typical equivalent input capacitance can withstand up to 500mA of reverse current (either polarity) • 25mV max. output offset from supply or ground without latching and up to 5V noise spikes (either polarity) • Replaces MIC426/427/428 and MIC1426/1427/1428 on ground pins. • Dual inverting, dual noninverting, and inverting/ Primarily intended for driving power MOSFETs, MIC4426/7/8 noninverting configurations drivers are suitable for driving other loads (capacitive, resistive, • ESD protection or inductive) which require low-impedance, high peak current, and fast switching time. Other applications include driving Applications heavily loaded clock lines, coaxial cables, or piezoelectric • MOSFET driver transducers. The only load limitation is that total driver power • Clock line driver dissipation must not exceed the limits of the package. • Coax cable driver Note See MIC4126/4127/4128 for high power and narrow • Piezoelectic transducer driver pulse applications. Functional Diagram V S INVERTING 0.6mA 0.1mA OUTA INA 2kΩ NONINVERTING INVERTING 0.6mA 0.1mA OUTB INB 2kΩ NONINVERTING GND Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com April 2008 1 M9999-042108

MIC4426/4427/4428 Micrel, Inc. Ordering Information Part Number Temperature Standard Pb-Free Range Package Configuration MIC4426BM MIC4426YM –40ºC to +85ºC 8-Pin SOIC Dual Inverting MIC4426CM MIC4426ZM –0ºC to +70ºC 8-Pin SOIC Dual Inverting MIC4426BMM MIC4426YMM –40ºC to +85ºC 8-Pin MSOP Dual Inverting MIC4426BN MIC4426YN –40ºC to +85ºC 8-Pin PDIP Dual Inverting MIC4426CN MIC4426ZN –0ºC to +70ºC 8-Pin PDIP Dual Inverting MIC4427BM MIC4427YM –40ºC to +85ºC 8-Pin SOIC Dual Non-Inverting MIC4427CM MIC4427ZM –0ºC to +70ºC 8-Pin SOIC Dual Non-Inverting MIC4427BMM MIC4427YMM –40ºC to +85ºC 8-Pin MSOP Dual Non-Inverting MIC4427BN MIC4427YN –40ºC to +85ºC 8-Pin PDIP Dual Non-Inverting MIC4427CN MIC4427ZN –0ºC to +70ºC 8-Pin PDIP Dual Non-Inverting MIC4428BM MIC4428YM –40ºC TO +85ºC 8-Pin SOIC Inverting + Non-Inverting MIC4428CM MIC4428ZM –0ºC to +70ºC 8-Pin SOIC Inverting + Non-Inverting MIC4428BMM MIC4428YMM –40ºC to +85ºC 8-Pin MSOP Inverting + Non-Inverting MIC4428BN MIC4428YN –40ºC to +85ºC 8-Pin PDIP Inverting + Non-Inverting MIC4428CN MIC4428ZN –0ºC to +70ºC 8-Pin PDIP Inverting + Non-Inverting Note DESC standard military drawing 5962-88503 available; MIC4426, CERDIP 8-Pin SMD#: 5962-8850307PA Micrel Part Number: 5952-8850307PA MIC4427, CERDIP 8-Pin SMD#: 5962-8850308PA Micrel Part Number: 5952-8850308PA MIC4428, CERDIP 8-Pin SMD#: 5962-8850309PA Micrel Part Number: 5952-8850309PA MIC426/427/428 Device Replacement MIC1426/1427/1428 Device Replacement Discontinued Number Replacement Discontinued Number Replacement MIC426CM MIC4426BM MIC1426CM MIC4426BM MIC426BM MIC4426BM MIC1426BM MIC4426BM MIC426CN MIC4426BN MIC1426CN MIC4426BN MIC426BN MIC4426BN MIC1426BN MIC4426BN MIC427CM MIC4427BM MIC1427CM MIC4427BM MIC427BM MIC4427BM MIC1427BM MIC4427BM MIC427CN MIC4427BN MIC1427CN MIC4427BN MIC427BN MIC4427BN MIC1427BN MIC4427BN MIC428CM MIC4428BM MIC1428CM MIC4428BM MIC428BM MIC4428BM MIC1428BM MIC4428BM MIC428CN MIC4428BN MIC1428CN MIC4428BN MIC428BN MIC4428BN MIC1428BN MIC4428BN M9999-042108 2 April 2008

MIC4426/4427/4428 Micrel, Inc. Pin Configuration MIC4426 MIC4426 MIC4427 MIC4427 MIC4428 MIC4428 NC 1 8 NC NC 1 8 NC NC 1 8 NC 2 A 7 2 A 7 2 A 7 INA 2 7 OUTA INA 2 7 OUTA INA 2 7 OUTA GND 3 6 V GND 3 6 V GND 3 6 V S S S 4 B 5 4 B 5 4 B 5 INB 4 5 OUTB INB 4 5 OUTB INB 4 5 OUTB Dual Dual Inverting+ Inverting Noninverting Noninverting Pin Description Pin Number Pin Name Pin Function 1, 8 NC not internally connected 2 INA Control Input A: TTL/CMOS compatible logic input. 3 GND Ground 4 INB Control Input B: TTL/CMOS compatible logic input. 5 OUTB Output B: CMOS totem-pole output. 6 V Supply Input: +4.5V to +18V S 7 OUTA Output A: CMOS totem-pole output. April 2008 3 M9999-042108

MIC4426/4427/4428 Micrel, Inc. Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (V ) .....................................................+22V Supply Voltage (V ) ......................................+4.5V to +18V S S Input Voltage (V ) ..........................V + 0.3V to GND – 5V Temperature Range (T ) IN S A Junction Temperature (T ) .........................................150°C (A) .........................................................–55°C to +125°C J Storage Temperature ................................–65°C to +150°C (B) ...........................................................–40°C to +85°C Lead Temperature (10 sec.) ......................................300°C Package Thermal Resistance ESD Rating(3) PDIP θJA ..........................................................................130°C/W PDIP θ ............................................................................42°C/W JC SOIC θ ...........................................................120°C/W JA SOIC θ ............................................................75°C/W JC MSOP θ .........................................................250°C/W JA Electrical Characteristics(4) 4.5V ≤ V ≤ 18V; T = 25°C, bold values indicate full specified temperature range; unless noted. s A Symbol Parameter Condition Min Typ Max Units Input V Logic 1 Input Voltage 2.4 1.4 V IH 2.4 1.5 V V Logic 0 Input Voltage 1.1 0.8 V IL 1.0 0.8 V I Input Current 0 ≤ V ≤ V –1 1 µA IN IN S Output V High Output Voltage V –0.025 V OH S V Low Output Voltage 0.025 V OL R Output Resistance I = 10mA, V = 18V 6 10 Ω O OUT S 8 12 Ω I Peak Output Current 1.5 A PK I Latch-Up Protection withstand reverse current >500 mA Switching Time t Rise Time test Figure 1 18 30 ns R 20 40 ns t Fall Time test Figure 1 15 20 ns F 29 40 ns t Delay Tlme test Flgure 1 17 30 ns D1 19 40 ns t Delay Time test Figure 1 23 50 ns D2 27 60 ns t Pulse Width test Figure 1 400 ns PW Power Supply I Power Supply Current V = V = 3.0V 0.6 1.4 4.5 mA S INA INB 1.5 8 mA I Power Supply Current V = V = 0.0V 0.18 0.4 mA S INA INB 0.19 0.6 mA Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions recommended. 4. Specification for packaged product only. M9999-042108 4 April 2008

MIC4426/4427/4428 Micrel, Inc. Test Circuits V = 18V V = 18V S S 0.1µF 4.7µF 0.1µF 4.7µF 6 6 2 7 2 7 INA A OUTA INA A OUTA 1000pF 1000pF MIC4426 MIC4427 INB4 B 5 OUTB INB4 B 5 OUTB 1000pF 1000pF Figure 1a. Inverting Configuration Figure 2a. Noninverting Configuration 5V 5V 2.5V 2.5V 90% 90% INPUT INPUT 10% 10% 0V 0V tPW tPW V tD1 tF tD2 tR V tD1 tR tD2 tF S S 90% 90% OUTPUT OUTPUT 10% 10% 0V 0V Figure 1b. Inverting Timing Figure 2b. Noninverting Timing April 2008 5 M9999-042108

MIC4426/4427/4428 Micrel, Inc. Electrical Characteristics Rise and FallTime vs. DelayTime vs. Rise and FallTime vs. SupplyVoltage SupplyVoltage Temperature 70 35 40 C = 1000pF C = 1000pF C = 1000pF L L L 60 T A = 25°C 30 T A = 25°C VS = 18V 50 25 30 tD2 tF ME(ns) 4300 ME(ns) 2105 tD1 ME(ns) 20 tR TI 20 tR TI 10 TI 10 tF 5 10 0 0 0 5 10 15 20 0 5 10 15 20 -75-50 -25 0 25 50 75100125150 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) TEMPERATURE (°C) DelayTime vs. Supply Current vs. Rise and FallTime vs. Temperature Capacitive Load Capacitive Load 35 80 1k 3205 CVS L == 1180V00pF tD2 T (mA) 7600 TV S A == 2158°VC 400kHz 100 TV S A == 2158°VC tR (ns) 20 tD1 URREN 5400 E(ns) tF E 15 C M TIM LY 30 TI 10 10 PP 20 200 U kHz 5 S 10 20kHz 0 0 1 -75-50-25 0 25 50 75100125 150 10 100 1000 10000 10 100 1000 10000 TEMPERATURE (°C) CAPACITIVE LOAD (pF) CAPACITIVE LOAD (pF) Supply Current vs. Frequency High Output vs. Current Low Output vs. Current 30 1.20 1.20 TA = 25°C V S = 18V TA = 25°C VC = 5V TA = 25°C VS = 5V mA) CL = 1000pF 0.96 V)0.96 T RRENT ( 20 10 V V | (V)OUT0.72 10 V OLAGE (0.72 10 V U – V LY C 10 | V S0.48 PUT 0.48 P 15 V T 15 V P 5 V U U 0.24 O0.24 S 0 0 0 1 10 100 1000 0 10 20 30 40 50 60 70 8090100 0 10 20 30 40 50 60 70 8090100 FREQUENCY (kHz) CURRENT SOURCED (mA) CURRENT SUNK (mA) Quiescent Power Supply Current Quiescent Power Supply Current Package Power Dissipation vs. SupplyVoltage vs. SupplyVoltage 2.5 400 1250 A SUPPLY CURRENT (mA)0112....5050 NBTA OO =T L H2O 5IAN°DCPUTS LOGIC "1" SUPPLY CURRENT (A)11235050000000 NBTA OO =T L H2O 5IAN°DCPUTS LOGIC "0" MAXIMUMPACKAGEOWER DISSIPTION (mW)1072505500000 PSDOIPIC P 0 0 0 0 5 10 15 20 0 5 10 15 20 25 50 75 100 125 150 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) AMBIENT TEMPERATURE (°C) M9999-042108 6 April 2008

MIC4426/4427/4428 Micrel, Inc. Applications Information Power Dissipation Supply Bypassing Power dissipation should be calculated to make sure that the driver is not operated beyond its thermal ratings. Quiescent Large currents are required to charge and discharge large power dissipation is negligible. A practical value for total capacitive loads quickly. For example, changing a 1000pF power dissipation is the sum of the dissipation caused by the load by 16V in 25ns requires 0.8A from the supply input. load and the transition power dissipation (P + P ). L T To guarantee low supply impedance over a wide frequency Load Dissipation range, parallel capacitors are recommended for power supply bypassing. Low-inductance ceramic MLC capacitors with short Power dissipation caused by continuous load current (when lead lengths (< 0.5”) should be used. A 1.0µF film capacitor driving a resistive load) through the driver’s output resistance in parallel with one or two 0.1µF ceramic MLC capacitors is: normally provides adequate bypassing. P = I 2 R L L O Grounding For capacitive loads, the dissipation in the driver is: When using the inverting drivers in the MIC4426 or MIC4428, P = f C V 2 L L S individual ground returns for the input and output circuits or Transition Dissipation a ground plane are recommended for optimum switching In applications switching at a high frequency, transition power speed. The voltage drop that occurs between the driver’s dissipation can be significant. This occurs during switching ground and the input signal ground, during normal high-cur- transitions when the P-channel and N-channel output FETs rent switching, will behave as negative feedback and degrade are both conducting for the brief moment when one is turning switching speed. on and the other is turning off. Control Input P = 2 f V Q T S Unused driver inputs must be connected to logic high (which Charge (Q) is read from the following graph: can be V ) or ground. For the lowest quiescent current S (< 500µA) , connect unused inputs to ground. A logic-high 1×10-8 signal will cause the driver to draw up to 9mA. 8×10-9 The drivers are designed with 100mV of control input hys- 6×10-9 Q) tsetaregseis c.u Trhreisn tp sropvikidees sw chleeann c htraanngsiintiogn ssta atensd. m Thineim coiznetsro ol uintppuutt GE ( 4×10-9 R voltage threshold is approximately 1.5V. The control input HA3×10-9 C recognizes 1.5V up to V as a logic high and draws less than S 2×10-9 1µA within this range. The MIC4426/7/8 drives the TL494, SG1526/7, MIC38C42, TSC170 and similar switch-mode power supply integrated 1×10-9 4 6 8 10 12 14 16 18 circuits. SUPPLY VOLTAGE (V) Crossover Energy Loss per Transition April 2008 7 M9999-042108

MIC4426/4427/4428 Micrel, Inc. Package Information MAX) PIN 1 0.150 (3.81) INCHES (MM) 0.013 (0.33) TYP 45° 0.010 (0.25) 0.0040 (0.102) 0.007 (0.18) 0°–8° 0.189 (4.8) 0.016 (0.40) 0.045 (1.14) PLANE 0.228 (5.79) 8-Pin SOIC (M) 0.112 (2.84) 0.187 (4.74) INCH (MM) 0.116 (2.95) 0.032 (0.81) 0.038 (0.97) 0.007 (0.18) 0.012 (0.30) R 0.005 (0.13) 0.012 (0.03) 5° 0.012 (0.03) R 0.004 (0.10) 0° MIN 0.0256 (0.65) TYP 0.035 (0.89) 0.021 (0.53) 8-Pin MM8™ MSOP (MM) 8-Pin Plastic DIP (N) M9999-042108 8 April 2008

MIC4426/4427/4428 Micrel, Inc. MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2003 Micrel, Incorporated. April 2008 9 M9999-042108

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M icrel: MIC4427YMM TR MIC4428ZM TR MIC4427YM TR MIC4426ZM TR MIC4426YMM TR M icrochip: MIC4427YM MIC4426ZN MIC4428YN MIC4428ZN MIC4426YN MIC4426YMM MIC4427YN MIC4427ZN MIC4427YMM MIC4426YM MIC4427ZM MIC4428YM MIC4426ZM MIC4428ZM MIC4428YMM MIC4428YMM-TR MIC4426ZM-TR MIC4427YM-TR MIC4428ZM-TR MIC4427YMM-TR MIC4426YMM-TR MIC4426YM-TR MIC4428YM-TR MIC4427ZM-TR