MIC44F18/19/20

6A, 13V High Speed MOSFET Drivers

with Enable Input

MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.

General Description

The MIC44F18, MIC44F19 and MIC44F20 are high-

speed single MOSFET drivers capable of sinking and

sourcing 6A for driving capacitive loads. With delay

times of less than 15ns and rise times into a 1000pF

load of 10ns, these MOSFET drivers are ideal for driving

large gate charge MOSFETs

in power supply

applications. The MIC44F18 is a non-inverting driver,

the MIC44F19 is an inverting driver suited for driving P-

Channel MOSFETs and the MIC44F20 is an inverting

driver for N-Channel MOSFETs.

Fabricated using Micrel’s proprietary BiCMOS/DMOS

process for low power consumption and high efficiency,

the MIC44F18/19/20 translates 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 input supply voltage range of the MIC44F18/19/20

is 4.5V to 13.2V, making the devices suitable for driving

MOSFETs in a wide range of power applications. Other

features include an enable function, latch-up protection,

and a programmable UVLO function.

The MIC44F18/19/20 has a junction temperature range

of –40°C to +125°C with exposed pad ePAD MSOP-8

and 2mm x 2mm MLF

Data sheets and support documentation can be found

on Micrel’s web site at: www.micrel.com.

Features

• 4.5V to 13.2V input operating range

• 6A peak output current

• High accuracy ±5% enable input threshold

• High speed switching capability

10ns rise time in 1000pF load

<15ns propagation delay time

• Flexible UVLO function

4.2V internally set UVLO

Programmable with external resistors

• Latch-up protection to >500mA reverse current on the

output pin

• Enable function

• Thermally enhanced ePAD MSOP-8 package option

• Pb-free packaging

Applications

• Synchronous switch-mode power supplies

• Secondary side synchronous rectification

Typical Applications

MOSFET Driver with 6.2V UVLO Externally Set

MOSFET Driver with 4.2V UVLO Internally Set

February 2011

M9999-020111-B