MIC4126/27/28

Dual 1.5A-Peak Low-Side MOSFET

Drivers in Advanced Packaging

Micro

LeadFrame and MLF are registered trademarks of Amkor Technology, Inc, Inc.

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1(408) 944-0800 • fax +1(408) 474-1000 • http://www.micrel.com

July 2005

M9999-072605

(408) 955-1690

General Description

The MIC4126, MIC4127, and MIC4128 family are highly-

reliable dual 1.5A low-side MOSFET drivers fabricated on

Micrel’s BiCMOS/DMOS process. The devices feature low

power

consumption

and

high

efficiency.

The

MIC4126/27/28 translate TTL or CMOS input logic levels to

output voltage levels that swing within 25mV of the positive

supply or ground whereas comparable bipolar devices are

capable of swinging only to within 1V of the supply. The

MIC4126/7/8 is available in three configurations: dual

inverting, dual non-inverting, and complimentary output.

The MIC4126/27/28 offer pin-compatible as well as smaller

footprint replacements for the MIC4426/27/28 with

improved packaging and electrical performance. The

MIC4126/27/28 are available in exposed pad, EPAD,

SOIC-8L and MSOP-8L options as well as a small-size

3mm x 3mm MLF™-8L option. The devices have an input

operating range of 4.5V to 20V.

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. The

devices can withstand up to 500mA of reverse current

(either polarity) without latching and up to 5V noise spikes

(either polarity) on ground pins.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Dual 1.5A-peak drivers

• 4.5V to 20V operating range

• Exposed backside pad packaging reduces heat

–

ePAD SOIC-8L (

–

ePAD MSOP-8L (

–

3mm x 3mm MLF™-8L (

• Bipolar/CMOS/DMOS construction

–

25mV maximum output offset from supply or ground

• Latch-up protection to >200mA reverse current

• Switches 1000pF in 25ns

• Logic-input threshold independent of supply voltage

• Logic-input protection to –5V

• 6pF typical equivalent input capacitance

• Dual inverting, dual non-inverting, and complementary

configurations

• -40°C to +125°C operating junction temperature range

Applications

• DC/DC converters

• Motor drivers

• Clock line driver

Functional Diagram

MIC4126/27/28 Block Diagram