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MIC5013
General Description
The MIC5013 is an 8-pin MOSFET driver with over-current
shutdown and a fault ?ag. It is designed to drive the gate of
an N-channel power MOSFET above 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 MOSFET from 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.
Other members of the Micrel driver family include the MIC5011
minimum parts count driver and MIC5012 dual driver.
Typical Application
Micrel, Inc.
MIC5013
Protected High- or Low-Side MOSFET 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
Ordering Information
Part Number
Standard Pb-Free
Temperature
Range
Package
MIC5013BN
MIC5013YN
–40oC to +85oC
8-pin Plastic
DIP
V =24V
+
MIC5013BM MIC5013YM –40oC to +85oC
8-pin SOIC
R TH
Sense Gate 6
R =
SR( V +100mV)
R I L – ( V
+100mV)
ControlInput
MIC5013
1 Input Fault 8
2 Thresh V+ 7
20k ? 3
4 Source Gnd 5
10μF
+
IRCZ44
(S=2590,
R=11m ?)
S
R1=
TR I P
TR I P
V+ S R R S
100mV (SR+ R S )
R
V
SENSE
S
43 ?
SOURCE
LOAD
R TH =
2200
TR I P
–1000
I =30A (trip current)
V
KELVIN
R1
4.3k?
For this example:
L
=100mV
TR I P
Figure 1. High-Side Driver with
Current-Sensing MOSFET
Note: The MIC5013 is ESD sensitive.
Protected under one or more of the following Micrel patents:
patent #4,951,101; patent #4,914,546
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
July 2005
1
MIC5013
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