MIC5013
Micrel
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 60碌s 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
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7V to 32V operation
Less than 1碌A standby current in the 鈥淥FF鈥?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
60碌s 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
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Lamp drivers
Relay and solenoid drivers
Heater switching
Power bus switching
Motion control
Typical Application
Ordering Information
Part Number
MIC5013BN
MIC5013BM
+
V =24V
Temperature Range
鈥?0掳C to +85掳C
鈥?0掳C to +85掳C
Package
8-pin Plastic DIP
8-pin SOIC
MIC5013
Control Input
R
TH
20k鈩?/div>
Fault 8
2 Thresh
V+ 7
3 Sense Gate 6
1 Input
4 Source
Gnd 5
10碌F
+
R =
S
SR( V
TRIP
+100mV)
+100mV)
R I
L
鈥?( V
TRIP
IRCZ44
(S=2590,
R=11m鈩?
SENSE
R1=
+
V SRR
S
100mV (SR+R
S
)
R
SOURCE
S
R
TH
=
2200
V
TRIP
鈥?000
43鈩?/div>
KELVIN
LOAD
R1
4.3k鈩?/div>
For this example:
I =30A (trip current)
L
V
TRIP
=100mV
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. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
July 2000
1
MIC5013
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