MIC4426 Micrel Semiconductor, MIC4426 Datasheet

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MIC4426

Manufacturer Part Number
MIC4426
Description
Dual 1.5A-Peak Low-Side MOSFET Driver
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The MIC4426/4427/4428 family are highly-reliable dual low-
side MOSFET drivers fabricated on a BiCMOS/DMOS pro-
cess 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 swing-
ing only to within 1V of the supply. The MIC4426/7/8 is
available in three configurations: dual inverting, dual nonin-
verting, 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 im-
proved 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, resis-
tive, or inductive) which require low-impedance, high peak
current, and fast switching time. Other applications include
driving heavily loaded clock lines, coaxial cables, or piezo-
electric transducers. The only load limitation is that total driver
power dissipation must not exceed the limits of the package.
Functional Diagram
September 1999
MIC4426/4427/4428
INA
INB
2k
2k
0.1mA
0.1mA
0.6mA
0.6mA
NONINVERTING
NONINVERTING
1
INVERTING
INVERTING
Features
• 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
• Switches 1000pF in 25ns
• Matched rise and rall times
• 7 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/
• ESD protection
Applications
• MOSFET driver
• Clock line driver
• Coax cable driver
• Piezoelectic transducer driver
noninverting configurations
Dual 1.5A-Peak Low-Side MOSFET Driver
4mA at logic 1 input
400 A at logic 0 input
MIC4426/4427/4428
GND
V
S
OUTA
OUTB
MIC4426/4427/4428
Micrel

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MIC4426 Summary of contents

Page 1

... 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 swing- ing only to within 1V of the supply. The MIC4426/7/8 is available in three configurations: dual inverting, dual nonin- verting, and one inverting plus one noninverting output. ...

Page 2

... NC 2 INA 3 GND 4 INB 5 OUTB OUTA MIC4426/4427/4428 Temperature Range Package – +125 C 8-lead SOIC – +85 C 8-lead SOIC – +85 C 8-lead MSOP – +85 C 8-lead Plastic DIP – +125 C 8-lead SOIC – +85 C 8-lead SOIC – ...

Page 3

... ............................................................ 130 C/W JA ............................................................. 42 C/W JC ........................................................... 120 C/W JA ............................................................. 75 C/W JC ......................................................... 250 C/W JC Min Typ 2.4 1.4 2.4 1.5 1.1 1.0 –1 V –0.025 1.5 >500 400 1.4 1.5 0.18 0.19 MIC4426/4427/4428 Micrel Max Units V V 0 0.025 4 0.4 mA 0.6 ...

Page 4

... INA A 1000pF MIC4426 4 5 INB B 1000pF Figure 1a. Inverting Configuration 5V 90% INPUT 10 90% OUTPUT 10% 0V Figure 1b. Inverting Timing MIC4426/4427/4428 4.7µF OUTA OUTB 2.5V INPUT OUTPUT 18V S 0.1µF 4.7µ OUTA INA A 1000pF MIC4427 4 5 INB B OUTB 1000pF Figure 2a ...

Page 5

... Low Output vs. Current 1. 0. 0.72 0.48 0. 100 CURRENT SUNK (mA) Package Power Dissipation 1250 1000 SOIC 750 500 PDIP 250 100 125 AMBIENT TEMPERATURE ( C) MIC4426/4427/4428 Micrel t F 150 10000 150 ...

Page 6

... F ceramic MLC capacitors normally provides adequate bypassing. Grounding 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 ...

Page 7

... MM8™ MSOP (MM) PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.135 (3.43) 0.125 (3.18) 0.380 (9.65) 0.130 (3.30) 0.320 (8.13) 0.100 (2.54) 0.0375 (0.952) 8-lead Plastic DIP ( 0.010 (0.25) 0.007 (0.18) 0.050 (1.27) 0.016 (0.40) 0.244 (6.20) 0.228 (5.79) DIMENSIONS: INCH (MM) 0.007 (0.18) 0.005 (0.13) 0.012 (0.03) R 0.039 (0.99) 0.035 (0.89) 0.021 (0.53) 0.255 (6.48) 0.245 (6.22) 0.300 (7.62) 0.013 (0.330) 0.010 (0.254) MIC4426/4427/4428 Micrel ...

Page 8

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC4426/4427/4428 + 1 (408) 944-0970 http://www ...

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