MIC4100/1

100V Half Bridge MOSFET Drivers

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

March 2006

M9999-031506

General Description

The MIC4100/1 are high frequency, 100V Half Bridge

MOSFET driver ICs featuring fast 30ns propagation delay

times. The low-side and high-side gate drivers are

independently controlled and matched to within 3ns

typical. The MIC4100 has CMOS input thresholds, and the

MIC4101 has TTL input thresholds. The MIC4100/1

include a high voltage internal diode that charges the high-

side gate drive bootstrap capacitor.

A robust, high-speed, and low power level shifter provides

clean level transitions to the high side output. The robust

operation of the MIC4100/1 ensures the outputs are not

affected by supply glitches, HS ringing below ground, or

HS slewing with high speed voltage transitions. Under-

voltage protection is provided on both the low-side and

high-side drivers.

The MIC4100 is available in the SOIC-8L package with a

junction operating range from –40

°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Bootstrap supply max voltage to 118V DC

• Supply voltage up to 16V

• Drives high- and low-side N-Channel MOSFETs with

independent inputs

• CMOS input thresholds (MIC4100)

• TTL input thresholds (MIC4101)

• On-chip bootstrap diode

• Fast 30ns propagation times

• Drives 1000pF load with 10ns rise and fall times

• Low power consumption

• Supply under-voltage protection

• 3Ω pull up , 3Ω pull down output resistance

• Space saving SOIC-8L package

• –40°C to +125°C junction temperature range

Applications

• High voltage buck converters

• Push-pull converters

• Full- and half-bridge converters

• Active clamp forward converters

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Typical Application

HI

MIC4100

SO-8

PWM

Controller

LI

HO

HS

LO

HB

VDD

9V to 16V Bias

100V Supply

GND

V

OUT

100V Buck Regulator Solution