MIC5013_05 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – Protected High- or Low-Side MOSFET Driver

MIC5013
Micrel, Inc.
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 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.
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
Ordering Information
V+ =24V
Part Number
Standard Pb-Free
MIC5013BN MIC5013YN
Temperature
Range
–40ºC to +85ºC
MIC5013BM MIC5013YM –40ºC to +85ºC
Package
8-pin Plastic
DIP
8-pin SOIC
Control Input
R_{T H}
20kΩ
MIC5013
+
10µF
1 _{Input Fault} 8
2 _{Thresh V+} 7
3 _{Sense Gate} 6
4 _{Source Gnd} 5
IRCZ44
(S=2590,
R=11mΩ)
SENSE ^RS
43Ω
KELVIN
R1
4.3kΩ
SOURCE
LOAD
Figure 1. High-Side Driver with
Current-Sensing MOSFET
R_S =
SR(V_{TRI P} +100mV)
R I_L – (V_{TRI P} +100mV)
R1=
V+S R R_S
100mV (SR+ R_S)
R_TH =
2200 _–1000
V_{TR I P}
For this example:
I _L =30A (trip current)
V
TR
I
P
=
100m
V
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 [phone] • fax + 1 [phone] • http://www.micrel.com
July 2005
1
MIC5013