Dual 3A-Peak Low-Side MOSFET Driver
Features
• Reliable, low-power bipolar/CMOS/DMOS construction
• Latch-up protected to >500mA reverse current
• Logic input withstands swing to –5V
• High 3A-peak output current
• Wide 4.5V to 18V operating range
• Drives 1800pF capacitance in 25ns
• Short <40ns typical delay time
• Delay times consistent with in supply voltage change
• Matched rise and fall times
• TTL logic input independent of supply voltage
• Low equivalent 6pF input capacitance
• Low supply current 3.5mA with logic-1 input 350µA with logic-0
input
• Low 3.5Ω typical output impedance
• Output voltage swings within 25mV of ground or VS.
• ‘426/7/8-, ‘1426/7/8-, ‘4426/7/8-compatible pinout
• Inverting, noninverting, and differential configurations
General Description
The MIC4423/4424/4425 family are highly reliable BiCMOS/ DMOS
buffer/driver/MOSFET drivers. They are higher output current
versions of the MIC4426/4427/4428, which are improved versions of
the MIC426/427/428. All three families are pin-compatible. The
MIC4423/4424/4425 drivers are capable of giving reliable service in
more demanding electrical environments than their predecessors.
They will not latch under any conditions within their power and
voltage ratings. They can survive up to 5V of noise spiking, of
either polarity, on the ground pin. They can accept, without either
damage or logic upset, up to half an amp of reverse current (either
polarity) forced back into their outputs.
The MIC4423/4424/4425 series drivers are easier to use, more
flexible in operation, and more forgiving than other CMOS or
bipolar drivers currently available. Their BiCMOS/DMOS construction
dissipates minimum power and provides rail-torail voltage swings.
Primarily intended for driving power MOSFETs, the MIC4423/4424/4425
drivers are suitable for driving other loads (capacitive,
resistive, or inductive) which require low-impedance, high peak
currents, and fast switching times. Heavily loaded clock lines,
coaxial cables, or piezoelectric transducers are some examples. The
only known limitation on loading is that total power dissipated in
the driver must be kept within the maximum power dissipation limits
of the package.
Pin Description
Pin Number DIP, SOIC | Pin Number Wide SOIC | Pin Name | Pin Function |
| 2 / 4 | 2 / 7 | INA/B | Control Input |
| 3 | 4, 5 | GND | Ground: Duplicate pins must be externally connected together. |
| 6 | 12, 13 | VS | Supply Input: Duplicate pins must be externally connected together. |
| 7 / 5 | 14, 15 / 10, 11 | OUTA/B | Output: Duplicate pins must be externally connected together |
| 1, 8 | 1, 3, 6, 8, 9, 16 | NC | not connected |
Functional Diagram
