MIC4103/4104

100V Half Bridge MOSFET Drivers

3/2A Sinking/Sourcing Current

MLF and MicroLead Frame is a registered trademark of Amkor Technologies, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

November 2010

M9999-110910-B

General Description

The MIC4103 and MIC4104 are high-frequency, 100V Half

Bridge MOSFET drivers with faster turn-off characteristics

than the MIC4100 and MIC4101 drivers. They feature fast

24ns propagation delay times and 6ns driver fall times.

The low-side and high-side gate drivers are independently

controlled and matched to within 3ns typical. The MIC4103

has CMOS input thresholds and the MIC4104 has TTL

input thresholds. The MIC4103/4 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 MIC4103/4 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 MIC4103 and MIC4104 are available in an 8-pin SOIC

package with a operating junction temperature range of –

40°C to +125°C.

Data sheets and support documentation can be found on

Features

• Asymmetrical, low impedance outputs drive 1000pF

load with 10ns rise times and 6ns fall times

• 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 (MIC4103)

• TTL input thresholds (MIC4104)

• On-chip bootstrap diode

• Fast 24ns propagation times

• Low power consumption

• Supply undervoltage protection

• Typical 2.5Ω pull up and 1.25Ω pull down output driver

resistance

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

Applications

• High-voltage buck converters

• Full- and half-bridge power topologies

• Active clamp forward converter

• Two switch forward topologies

• Interface to digital controllers

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Typical Application

100V Buck Regulator Solution