July 2005

1

MIC5013

MIC5013

Micrel, Inc.

Fault

V+

Gate

1

2

3

4

8

MIC5013

Gnd

7

6

5

Thresh

Sense

Source

Input

=24V

IRCZ44

(S=2590,

R=11mΩ)

10µF

43Ω

20kΩ

4.3kΩ

R

R1

LOAD

Control Input

V+

+

S

R1=

100mV

S R R

(SR+R )

V+

SR(

+100mV)

R I – (

+100mV)

R =

R =

–1000

2200

V

TRI P

S

For this example:

=30A (trip current)

I

L

=100mV

V

TRI P

S

S

TH

V

TRI P

V

TRI P

L

R

TH

S E N S E

SO U R C E

KELVIN

MIC5013

Protected High- or Low-Side MOSFET Driver

General Description

The MIC5013 is an 8-pin MOSFET driver with over-current

shutdown and a fault flag. It is designed to drive the gate of

an N-channel power MOSFETabove the supply rail high-side

power switch applications. The MIC5013 is compatible with

standard or current-sensing power MOSFETs in both high-

and low-side driver topologies.

The MIC5013 charges a 1nF load in 60µs typical and protects

the MOSFETfrom over-current conditions.The current sense

trip point is fully programmable and a dynamic threshold

allows high in-rush current loads to be started. A fault pin

indicates when the MIC5013 has turned off the FET due to

excessive current.

OthermembersoftheMicreldriverfamilyincludetheMIC5011

minimum parts count driver and MIC5012 dual driver.

Features

• 7V to 32V operation

• Less than 1µA standby current in the “OFF” state

• Available in small outline SOIC packages

• Internal charge pump to drive the gate of an N-channel

power FET above supply

• Internal zener clamp for gate protection

• 60µs typical turn-on time to 50% gate overdrive

• Programmable over-current sensing

• Dynamic current threshold for high in-rush loads

• Fault output pin indicates current faults

• Implements high- or low-side switches

Applications

• Lamp drivers

• Relay and solenoid drivers

• Heater switching

• Power bus switching

• Motion control

Typical Application

Protected under one or more of the following Micrel patents:

patent #4,951,101; patent #4,914,546

Note: The MIC5013 is ESD sensitive.

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

Ordering Information

Part Number

Temperature

Range

Package

Standard

Pb-Free

MIC5013BN MIC5013YN –40ºC to +85ºC

8-pin Plastic

DIP

MIC5013BM MIC5013YM –40ºC to +85ºC

8-pin SOIC

Figure 1. High-Side Driver with

Current-Sensing MOSFET