MIC5013
Micrel
MIC5013
Protected High- or Low-Side MOSFET Driver
General Description
Features
The MIC5013 is an 8-pin MOSFET driver with over-current
shutdown and a fault flag. It is designed to drive the gate of
anN-channelpowerMOSFETabovethesupplyrailhigh-side
power switch applications. The MIC5013 is compatible with
standard or current-sensing power MOSFETs in both high-
and low-side driver topologies.
• 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
TheMIC5013chargesa1nFloadin60µstypicalandprotects
theMOSFETfromover-currentconditions.Thecurrentsense
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.
Applications
• Lamp drivers
OthermembersoftheMicreldriverfamilyincludetheMIC5011
minimum parts count driver and MIC5012 dual driver.
• Relay and solenoid drivers
• Heater switching
• Power bus switching
• Motion control
Typical Application
Ordering Information
Part Number Temperature Range
Package
MIC5013BN
MIC5013BM
–40°C to +85°C
–40°C to +85°C
8-pin Plastic DIP
8-pin SOIC
+
V =24V
+
10µF
MIC5013
8
7
6
5
1
2
3
4
Control Input
Input
Fault
RTH
Thresh
Sense
V+
SR(
+100mV)
VTRIP
20kΩ
RS
=
Gate
R I – (
+100mV)
VTRIP
L
Source Gnd
+
SRRS
V
IRCZ44
R1=
(S=2590,
100mV (SR+RS)
R=11mΩ)
2200
SOURCE
RS
RTH
=
–1000
SENSE
KELVIN
VTRIP
43Ω
LOAD
For this example:
R1
4.3kΩ
IL =30A (trip current)
V
TRIP =100mV
Figure 1. High-Side Driver with
Current-Sensing MOSFET
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. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
July 2000
1
MIC5013