Features INVERTING. 0.6mA NONINVERTING INVERTING. 0.6mA NONINVERTING

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1 MIC442/442/4428 Dual 1.A-Peak Low-Side MOSFET Driver General Description The MIC442/442/4428 family are highly-reliable dual lowside MOSFET drivers fabricated on a BiCMOS/DMOS process for low power consumption and high efficiency. These drivers translate TTL or CMOS input logic levels to output voltage levels that swing within 2mV of the positive supply or ground. Comparable bipolar devices are capable of swinging only to within 1V of the supply. The MIC442//8 is available in three configurations: dual inverting, dual noninverting, and one inverting plus one noninverting output. The MIC442/442/4428 are pin-compatible replacements for the MIC42/42/428 and MIC142/142/1428 with improved electrical performance and rugged design (Refer to the Device Replacement lists on the following page). They can withstand up to ma of reverse current (either polarity) without latching and up to V noise spikes (either polarity) on ground pins. Primarily intended for driving power MOSFETs, MIC442//8 drivers are suitable for driving other loads (capacitive, resistive, or inductive) which require low-impedance, high peak current, and fast switching time. Other applications include driving heavily loaded clock lines, coaxial cables, or piezoelectric transducers. The only load limitation is that total driver power dissipation must not exceed the limits of the package. Note See MIC412/412/4128 for high power and narrow pulse applications. Functional Diagram Features Bipolar/CMOS/DMOS construction Latch-up protection to >ma reverse current 1.A-peak output current 4.V to 18V operating range Low quiescent supply current 4mA at logic 1 input 4µA at logic input Switches 1pF in 2ns Matched rise and rall times Ω output impedance <4ns typical delay Logic-input threshold independent of supply voltage Logic-input protection to V pf typical equivalent input capacitance 2mV max. output offset from supply or ground Replaces MIC42/42/428 and MIC142/142/1428 Dual inverting, dual noninverting, and inverting/ noninverting configurations ESD protection Applications MOSFET driver Clock line driver Coax cable driver Piezoelectic transducer driver.1ma.ma INVERTING INA 2kΩ NONINVERTING.1mA.mA INVERTING INB 2kΩ OUTB NONINVERTING GND 218 Fortune Drive San Jose, CA 9131 USA tel + 1 (48) fax + 1 (48) April 28 1 M

2 Ordering Information Part Number Temperature Standard Pb-Free Range Package Configuration MIC442BM MIC442YM 4ºC to +8ºC 8-Pin SOIC Dual Inverting MIC442CM MIC442ZM ºC to +ºC 8-Pin SOIC Dual Inverting MIC442BMM MIC442YMM 4ºC to +8ºC 8-Pin MSOP Dual Inverting MIC442BN MIC442YN 4ºC to +8ºC 8-Pin PDIP Dual Inverting MIC442CN MIC442ZN ºC to +ºC 8-Pin PDIP Dual Inverting MIC442BM MIC442YM 4ºC to +8ºC 8-Pin SOIC Dual Non-Inverting MIC442CM MIC442ZM ºC to +ºC 8-Pin SOIC Dual Non-Inverting MIC442BMM MIC442YMM 4ºC to +8ºC 8-Pin MSOP Dual Non-Inverting MIC442BN MIC442YN 4ºC to +8ºC 8-Pin PDIP Dual Non-Inverting MIC442CN MIC442ZN ºC to +ºC 8-Pin PDIP Dual Non-Inverting MIC4428BM MIC4428YM 4ºC TO +8ºC 8-Pin SOIC Inverting + Non-Inverting MIC4428CM MIC4428ZM ºC to +ºC 8-Pin SOIC Inverting + Non-Inverting MIC4428BMM MIC4428YMM 4ºC to +8ºC 8-Pin MSOP Inverting + Non-Inverting MIC4428BN MIC4428YN 4ºC to +8ºC 8-Pin PDIP Inverting + Non-Inverting MIC4428CN MIC4428ZN ºC to +ºC 8-Pin PDIP Inverting + Non-Inverting Note DESC standard military drawing available; MIC442, CERDIP 8-Pin SMD#: PA Micrel Part Number: PA MIC442, CERDIP 8-Pin SMD#: PA Micrel Part Number: PA MIC4428, CERDIP 8-Pin SMD#: PA Micrel Part Number: PA MIC42/42/428 Device Replacement Discontinued Number Replacement MIC42CM MIC442BM MIC42BM MIC442BM MIC42CN MIC442BN MIC42BN MIC442BN MIC42CM MIC442BM MIC42BM MIC442BM MIC42CN MIC442BN MIC42BN MIC442BN MIC428CM MIC4428BM MIC428BM MIC4428BM MIC428CN MIC4428BN MIC428BN MIC4428BN MIC142/142/1428 Device Replacement Discontinued Number Replacement MIC142CM MIC442BM MIC142BM MIC442BM MIC142CN MIC442BN MIC142BN MIC442BN MIC142CM MIC442BM MIC142BM MIC442BM MIC142CN MIC442BN MIC142BN MIC442BN MIC1428CM MIC4428BM MIC1428BM MIC4428BM MIC1428CN MIC4428BN MIC1428BN MIC4428BN M April 28

3 Pin Configuration NC 1 INA 2 GND 3 INB 4 MIC442 Dual Inverting 8 NC OUTB 2 4 MIC442 MIC442 MIC442 MIC4428 MIC4428 NC 1 8 NC NC 1 8 NC A INA 2 GND 3 2 A INA 2 GND 3 2 A B INB 4 OUTB 4 B INB 4 OUTB 4 B Dual Noninverting Inverting+ 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. OUTB Output B: CMOS totem-pole output. Supply Input: +4.V to +18V Output A: CMOS totem-pole output. April 28 3 M

4 Absolute Maximum Ratings (1) Supply Voltage ( )...+22V Input Voltage (V IN ) V to GND V Junction Temperature (T J )... 1 C Storage Temperature... C to +1 C Lead Temperature (1 sec.)... 3 C ESD Rating (3) Operating Ratings (2) Supply Voltage ( ) V to +18V Temperature Range (T A ) (A)... C to +12 C (B)... 4 C to +8 C Package Thermal Resistance PDIP θ JA C/W PDIP θ JC C/W SOIC θ JA C/W SOIC θ JC... C/W MSOP θ JA... 2 C/W Electrical Characteristics (4) 4.V V s 18V; T A = 2 C, bold values indicate full specified temperature range; unless noted. Symbol Parameter Condition Min Typ Max Units Input V IH Logic 1 Input Voltage V V V IL Logic Input Voltage V 1..8 V I IN Input Current V IN 1 1 µa Output V OH High Output Voltage.2 V V OL Low Output Voltage.2 V R O Outpuesistance I OUT = 1mA, 1 Ω 8 12 Ω I PK Peak Output Current 1. A I Latch-Up Protection withstand reverse current > ma Switching Time Rise Time tesigure ns 2 4 ns Fall Time tesigure ns 29 4 ns t D1 Delay Tlme teslgure ns 19 4 ns t D2 Delay Time tesigure 1 23 ns 2 ns t PW Pulse Width tesigure 1 4 ns Power Supply I S Power Supply Current V INA = V INB = 3.V ma 1. 8 ma I S Power Supply Current V INA = V INB =.V.18.4 ma.19. 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. M April 28

5 Test Circuits.1µF 4.µF.1µF 4.µF INA 2 A MIC442 1pF INA 2 A MIC442 1pF INB 4 B OUTB 1pF INB 4 B OUTB 1pF Figure 1a. Inverting Configuration Figure 2a. Noninverting Configuration V INPUT 9% 1% V t PW 2.V V INPUT 9% 1% V t PW 2.V 9% t D1 t D2 9% t D1 t D2 OUTPUT OUTPUT 1% V 1% V Figure 1b. Inverting Timing Figure 2b. Noninverting Timing April 28 M

6 Electrical Characteristics Rise and Fall Time vs. Supply Voltage C L = 1pF T A = 2 C 3 3 Delay Time vs. Supply Voltage C = 1pF L T A = 2 C 4 Rise and Fall Time vs. Temperature C L = 1pF C L = 1pF t D TEMPERATURE ( C) Delay Time vs. Temperature t D2 SUPPLY CURRENT (ma) t D1 t D T A = 2 C Supply Current vs. Capacitive Load 4kHz 2 khz 2kHz CAPACITIVE LOAD (pf) k 1 1 TEMPERATURE ( C) T A = 2 C CAPACITIVE LOAD (pf) Rise and Fall Time vs. Capacitive Load SUPPLY CURRENT (ma) Supply Current vs. Frequency High Output vs. Current Low Output vs. Current T A = 2 C T A = 2 C V C = V T = 2 C V A S = V C L = 1pF.9.9 V 1 V V V (V) S OUT V 1 V OUTPUT VOL AGE (V) V 1 V FREQUENCY (khz) CURRENT SOURCED (ma) CURRENT SUNK (ma) 2. Quiescent Power Supply Current vs. Supply Voltage 4 Quiescent Power Supply Current vs. Supply Voltage 12 Package Power Dissipation SUPPLY CURRENT (ma) NO LOAD BOTH INPUTS LOGIC "1" T = 2 C A SUPPLY CURRENT (A) NO LOAD BOTH INPUTS LOGIC "" T = 2 C A MAXIMUM PACKAGE POWER DISSIP TION (mw) 1 2 SOIC PDIP AMBIENT TEMPERATURE ( C) M April 28

7 Applications Information Supply Bypassing Large currents are required to charge and discharge large capacitive loads quickly. For example, changing a 1pF load by 1V in 2ns requires.8a from the supply input. To guarantee low supply impedance over a wide frequency range, parallel capacitors are recommended for power supply bypassing. Low-inductance ceramic MLC capacitors with short lead lengths (<. ) should be used. A 1.µF film capacitor in parallel with one or two.1µf ceramic MLC capacitors normally provides adequate bypassing. Grounding When using the inverting drivers in the MIC442 or MIC4428, individual ground returns for the input and output circuits or a ground plane are recommended for optimum switching speed. The voltage drop that occurs between the driver s ground and the input signal ground, during normal high-current switching, will behave as negative feedback and degrade switching speed. Control Input Unused driver inputs must be connected to logic high (which can be ) or ground. For the lowest quiescent current (< µa), connect unused inputs to ground. A logic-high signal will cause the driver to draw up to 9mA. The drivers are designed with 1mV of control input hysteresis. This provides clean transitions and minimizes output stage current spikes when changing states. The control input voltage threshold is approximately 1.V. The control input recognizes 1.V up to as a logic high and draws less than 1µA within this range. The MIC442//8 drives the TL494, SG12/, MIC38C42, TSC1 and similar switch-mode power supply integrated circuits. Power Dissipation Power dissipation should be calculated to make sure that the driver is not operated beyond its thermal ratings. Quiescent power dissipation is negligible. A practical value for total power dissipation is the sum of the dissipation caused by the load and the transition power dissipation (P L + P T ). Load Dissipation Power dissipation caused by continuous load current (when driving a resistive load) through the driver s output resistance is: P L = I 2 L R O For capacitive loads, the dissipation in the driver is: P L = f C L V 2 S Transition Dissipation In applications switching at a high frequency, transition power dissipation can be significant. This occurs during switching transitions when the P-channel and N-channel outpuets are both conducting for the brief moment when one is turning on and the other is turning off. P T = 2 f Q Charge (Q) is read from the following graph: CHARGE (Q) Crossover Energy Loss per Transition April 28 M

8 Package Information MAX ) PIN 1.1 (3.81) INCHES (MM).13 (.33) TYP.4 (.12) 4.1 (.2). (.18).4 (1.14).189 (4.8) PLANE 8.1 (.4).228 (.9) 8-Pin SOIC (M).112 (2.84).18 (4.4) INCH (MM).11 (2.9).32 (.81).38 (.9).12 (.3) R. (.18). (.13).12 (.3).2 (.) TYP.4 (.1) MIN 8-Pin MM8 MSOP (MM).12 (.3) R.3 (.89).21 (.3) 8-Pin Plastic DIP (N) M April 28

9 MICREL INC. 218 FORTUNE DRIVE SAN JOSE, CA 9131 USA TEL + 1 (48) FAX + 1 (48) 44-1 WEB 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. 23 Micrel, Incorporated. April 28 9 M