MIC4604

85V Half Bridge MOSFET Drivers with up to

16V Programmable Gate Drive

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

June 25, 2013

Revision 1.0

General Description

The MIC4604 is an 85V Half Bridge MOSFET driver. The

MIC4604 features fast 39ns propagation delay times and

20ns driver rise/fall times for a 1nF capacitive load. The

low-side and high-side gate drivers are independently

controlled. The MIC4604 has TTL input thresholds. It

includes a high-voltage internal diode that helps charge

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 MIC4604 ensures that the outputs are not

affected by supply glitches, HS ringing below ground, or

HS

slewing

with

high-speed

voltage

transitions.

Undervoltage protection is provided on both the low-side

and high-side drivers.

The MIC4604 is available in an 8-pin SOIC package and a

tiny 10-pin 2.5mm

× 2.5mm TDFN package. Both

packages have an operating junction temperature range of

–40°C to +125°C.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Features

• 5.5V to 16V gate drive supply voltage range.

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

with independent inputs

• TTL input thresholds

• On chip bootstrap diode

• Fast 39ns propagation times

• Drives 1000pF load with 20ns rise and fall times

• Low power consumption

• Supplies undervoltage protection

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

Applications

• Power inverters

• High-voltage step-down regulators

• Half, full and 3-phase bridge motor drives

• Distributed power systems

• Computing peripherals

Typical Application

Motor Door Lock Solution