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 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 25mV of the positive supply or ground. Comparable bipolar devices are capable of swinging only to within 1V of the supply. The MIC4426/7/8 is available in three configurations: dual inverting, dual noninverting, and one inverting plus one noninverting output. • • • • • • • • • • • • • • • The MIC4426/4427/4428 are pin-compatible replacements for the MIC426/427/428 and MIC1426/1427/1428 with improved electrical performance and rugged design (Refer to the Device Replacement lists on the following page). They can withstand up to 500mA of reverse current (either polarity) without latching and up to 5V noise spikes (either polarity) on ground pins. Primarily intended for driving power MOSFETs, MIC4426/7/8 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. • Bipolar/CMOS/DMOS construction Latch-up protection to >500mA reverse current 1.5A-peak output current 4.5V to 18V operating range Low quiescent supply current 4mA at logic 1 input 400µA at logic 0 input Switches 1000pF in 25ns Matched rise and rall times 7Ω output impedance <40ns typical delay Logic-input threshold independent of supply voltage Logic-input protection to –5V 6pF typical equivalent input capacitance 25mV max. output offset from supply or ground Replaces MIC426/427/428 and MIC1426/1427/1428 Dual inverting, dual noninverting, and inverting/ noninverting configurations ESD protection Applications • • • • Note See MIC4126/4127/4128 for high power and narrow pulse applications. MOSFET driver Clock line driver Coax cable driver Piezoelectic transducer driver Functional Diagram VS 0.1mA 0.6mA INVERTING OUTA INA 2kΩ NONINVERTING 0.1mA 0.6mA INVERTING 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 Standard Part Number MIC4426BM MIC4426CM Pb-Free Temperature Range Package Configuration MIC4426YM –40ºC to +85ºC 8-Pin SOIC Dual Inverting MIC4426ZM –0ºC to +70ºC 8-Pin SOIC Dual Inverting 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 MIC4426BMM MIC4427CM MIC4427ZM –0ºC to +70ºC 8-Pin SOIC Dual Non-Inverting 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 MIC4427BMM 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 MIC4427, CERDIP 8-Pin SMD#: 5962-8850308PA MIC4428, CERDIP 8-Pin SMD#: 5962-8850309PA Micrel Part Number: 5952-8850307PA Micrel Part Number: 5952-8850308PA Micrel Part Number: 5952-8850309PA MIC426/427/428 Device Replacement Discontinued Number MIC426CM MIC426BM MIC426CN MIC426BN MIC427CM MIC427BM MIC427CN MIC427BN MIC428CM MIC428BM MIC428CN MIC428BN M9999-042108 MIC1426/1427/1428 Device Replacement Replacement MIC4426BM MIC4426BM MIC4426BN MIC4426BN MIC4427BM MIC4427BM MIC4427BN MIC4427BN MIC4428BM MIC4428BM MIC4428BN MIC4428BN Discontinued Number MIC1426CM MIC1426BM MIC1426CN MIC1426BN MIC1427CM MIC1427BM MIC1427CN MIC1427BN MIC1428CM MIC1428BM MIC1428CN MIC1428BN 2 Replacement MIC4426BM MIC4426BM MIC4426BN MIC4426BN MIC4427BM MIC4427BM MIC4427BN MIC4427BN MIC4428BM MIC4428BM MIC4428BN MIC4428BN April 2008 MIC4426/4427/4428 Micrel, Inc. Pin Configuration NC 1 8 NC INA 2 7 OUTA GND 3 6 VS INB 4 5 OUTB MIC4427 MIC4426 MIC4426 2 A 7 4 B 5 NC 1 8 NC INA 2 7 OUTA GND 3 6 VS INB 4 MIC4428 MIC4427 5 OUTB 2 A 7 4 B 5 NC 1 8 NC INA 2 7 OUTA GND 3 6 VS INB 4 5 OUTB 2 A 7 4 B 5 Inverting+ Noninverting Dual Noninverting Dual Inverting MIC4428 Pin Description Pin Number Pin Name 1, 8 NC not internally connected 2 INA Control Input A: TTL/CMOS compatible logic input. 3 GND 4 INB 5 OUTB 6 7 April 2008 VS OUTA Pin Function Ground Control Input B: TTL/CMOS compatible logic input. Output B: CMOS totem-pole output. Supply Input: +4.5V to +18V Output A: CMOS totem-pole output. 3 M9999-042108 MIC4426/4427/4428 Micrel, Inc. Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VS) ..................................................... +22V Input Voltage (VIN) .......................... VS + 0.3V to GND – 5V Junction Temperature (TJ) ......................................... 150°C Storage Temperature ................................ –65°C to +150°C Lead Temperature (10 sec.) ...................................... 300°C ESD Rating(3) Supply Voltage (VS) ...................................... +4.5V to +18V Temperature Range (TA) (A) ......................................................... –55°C to +125°C (B) ........................................................... –40°C to +85°C Package Thermal Resistance PDIP θJA .......................................................................... 130°C/W PDIP θJC ............................................................................ 42°C/W SOIC θJA ........................................................... 120°C/W SOIC θJC ............................................................ 75°C/W MSOP θJA ......................................................... 250°C/W Electrical Characteristics(4) 4.5V ≤ Vs ≤ 18V; TA = 25°C, bold values indicate full specified temperature range; unless noted. Symbol Parameter Condition Min Typ 2.4 2.4 1.4 1.5 Max Units Input VIH Logic 1 Input Voltage VIL Logic 0 Input Voltage IIN Input Current VOH High Output Voltage Output VOL RO IPK I 1.1 1.0 –1 0 ≤ VIN ≤ VS VS–0.025 Low Output Voltage Output Resistance IOUT = 10mA, VS = 18V 0.8 0.8 V V 1 µA V 6 8 0.025 V 10 12 Ω Ω 1.5 Peak Output Current Latch-Up Protection V V withstand reverse current A >500 mA Switching Time tR Rise Time test Figure 1 18 20 30 40 ns ns tF Fall Time test Figure 1 15 29 20 40 ns ns tD1 Delay Tlme test Flgure 1 17 19 30 40 ns ns tD2 Delay Time test Figure 1 23 27 50 60 ns ns tPW Pulse Width test Figure 1 400 IS Power Supply Current VINA = VINB = 3.0V 0.6 IS Power Supply Current VINA = VINB = 0.0V ns Power Supply 1.4 1.5 4.5 8 mA mA 0.18 0.19 0.4 0.6 mA 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 VS = 18V VS = 18V 0.1µF 6 INA 2 7 A MIC4426 4 5 B INB 4.7µF OUTA 1000pF INA INPUT OUTB 1000pF VS 90% tD1 tF tD2 4.7µF 7 OUTA 1000pF 5 OUTB 1000pF Figure 2a. Noninverting Configuration tR 5V 90% 2.5V 10% 0V VS 90% tD1 tP W tR tD2 tF O U TPU T O U TPU T 10% 0V 10% 0V Figure 1b. Inverting Timing April 2008 B INB INPUT tP W A MIC4427 2.5V 10% 0V 2 4 Figure 1a. Inverting Configuration 5V 90% 0.1µF 6 Figure 2b. Noninverting Timing 5 M9999-042108 MIC4426/4427/4428 Micrel, Inc. Electrical Characteristics Delay Time vs. Supply Voltage Rise and Fall Time vs. Supply Voltage 30 40 20 30 tR 20 tF 10 0 0 t D1 15 10 0 20 0 20 t D1 10 5 0 40 30 200 kHz 20kHz 20 10 10 SUPPLY CURRENT (mA) 2.5 | VS – VOUT | (V) 1000 1.5 NO LOAD BOTH INPUTS LOGIC "1" TA = 25°C 0.5 0 0 5 10 15 SUPPLY VOLTAGE (V) M9999-042108 400 20 10 V 15 V Quiescent Power Supply Current vs. Supply Voltage TA = 25°C VS = 5V 0.72 10 V 0.48 15 V 0.24 0 0 10 20 30 40 50 60 70 80 90 100 300 0 10 20 30 40 50 60 70 80 90 100 CURRENT SUNK (mA) Package Power Dissipation 1250 1000 200 150 NO LOAD BOTH INPUTS LOGIC "0" TA = 25°C 100 50 0 100 1000 10000 CAPACITIVE LOAD (pF) 0.96 CURRENT SOURCED (mA) 2.0 10 Low Output vs. Current VC = 5V 0.24 10 100 FREQUENCY (kHz) 10 1.20 0.48 Quiescent Power Supply Current vs. Supply Voltage 1.0 TA = 25°C 0.72 0 1 tR High Output vs. Current SUPPLY CURRENT (A) SUPPLY CURRENT (mA) 0 5V T A = 25°C VS = 18V tF 1 100 1000 10000 CAPACITIVE LOAD (pF) 0.96 10 V 1k 100 50 1.20 VS = 18V 20 10 Rise and Fall Time vs. Capacitive Load 60 Supply Current vs. Frequency TA = 25°C CL = 1000pF TEMPERATURE (°C) 400kHz T A = 25°C VS = 18V 70 0 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) 30 -75 -50 -25 0 25 50 75 100 125 150 20 TIME (ns) t D2 25 TIME (ns) SUPPLY CURRENT (mA) 80 15 5 10 15 SUPPLY VOLTAGE (V) Supply Current vs. Capacitive Load CL = 1000pF VS = 18V 30 tR 10 Delay Time vs. Temperature 35 tF 20 5 5 10 15 SUPPLY VOLTAGE (V) CL = 1000pF VS = 18V 30 t D2 TIME (ns) 25 TIME (ns) 50 40 CL = 1000pF TA = 25°C OUTPUT VOL AGE (V) 60 TIME (ns) 35 CL = 1000pF TA = 25°C MAXIMUM PACKAGE POWER DISSIP TION (mW) 70 Rise and Fall Time vs. Temperature 0 5 10 15 SUPPLY VOLTAGE (V) 6 20 SOIC 750 500 PDIP 250 0 25 50 75 100 125 150 AMBIENT TEMPERATURE (°C) April 2008 MIC4426/4427/4428 Micrel, Inc. Applications Information 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 (PL + PT). Supply Bypassing Large currents are required to charge and discharge large capacitive loads quickly. For example, changing a 1000pF load by 16V in 25ns requires 0.8A 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 (< 0.5”) should be used. A 1.0µF film capacitor in parallel with one or two 0.1µF ceramic MLC capacitors normally provides adequate bypassing. Load Dissipation Power dissipation caused by continuous load current (when driving a resistive load) through the driver’s output resistance is: PL = IL2 RO Grounding For capacitive loads, the dissipation in the driver is: PL = f CL VS2 When using the inverting drivers in the MIC4426 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. 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 output FETs are both conducting for the brief moment when one is turning on and the other is turning off. Control Input PT = 2 f VS Q Unused driver inputs must be connected to logic high (which can be VS) or ground. For the lowest quiescent current (< 500µA) , connect unused inputs to ground. A logic-high signal will cause the driver to draw up to 9mA. Charge (Q) is read from the following graph: 1×10-8 8×10-9 CHARGE (Q) The drivers are designed with 100mV of control input hysteresis. This provides clean transitions and minimizes output stage current spikes when changing states. The control input voltage threshold is approximately 1.5V. The control input recognizes 1.5V up to VS as a logic high and draws less than 1µA within this range. 6×10-9 4×10-9 3×10-9 2×10-9 The MIC4426/7/8 drives the TL494, SG1526/7, MIC38C42, TSC170 and similar switch-mode power supply integrated circuits. 1×10-9 4 6 8 10 12 14 16 SUPPLY VOLTAGE (V) 18 Crossover Energy Loss per Transition April 2008 7 M9999-042108 MIC4426/4427/4428 Micrel, Inc. Package Information MAX ) PIN 1 INCHES (MM) 0.150 (3.81) 0.013 (0.33) 45° TYP 0.0040 (0.102) 0.010 (0.25) 0.007 (0.18) 0°–8° 0.189 (4.8) 0.016 (0.40) PLANE 0.045 (1.14) 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) 0.012 (0.30) R 0.012 (0.03) 0.0256 (0.65) TYP 5° 0° MIN 0.004 (0.10) 0.007 (0.18) 0.005 (0.13) 0.012 (0.03) R 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