MIC5010
Micrel
MIC5010
Full-Featured High- or Low-Side MOSFET Driver
Not Recommended for New Designs
General Description
The MIC5010 is the full-featured member of the Micrel
MIC501X driver family. These ICs are designed to drive the
gate of an N-channel power MOSFET above the supply rail
in high-side power switch applications. The MIC5010 is
compatible with standard or current-sensing power FETs in
both high- and low-side driver topologies.
The MIC5010 charges a 1nF load in 60碌s typical and
protects the MOSFET from over-current conditions. Faster
switching is achieved by adding two 1nF charge pump
capacitors. The current sense trip point is fully program-
mable and a dynamic threshold allows high in-rush current
loads to be started. A fault pin indicates when the MIC5010
has turned off the FET due to excessive current.
Other members of the Micrel driver family include the
MIC5011 minimum parts count 8 pin driver, MIC5012 dual
driver, and MIC5013 protected 8 pin driver.
Features
鈥?7V to 32V operation
鈥?Less than 1碌A standby current in the 鈥淥FF鈥?state
鈥?Internal charge pump to drive the gate of an N-channel
power FET above supply
鈥?Available in small outline SOIC packages
鈥?Internal zener clamp for gate protection
鈥?25碌s typical turn-on time to 50% gate overdrive
鈥?Programmable over-current sensing
鈥?Dynamic current threshold for high in-rush loads
鈥?Fault output pin indicates current faults
鈥?Implements high- or low-side switches
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Lamp drivers
Relay and solenoid drivers
Heater switching
Power bus switching
Motion control
Half or full H-bridge drivers
5
Package
14-pin Plastic DIP
14-pin SOIC
Typical Application
Ordering Information
Part Number
MIC5010BN
MIC5010BM
Temperature Range
鈥?0掳C to +85掳C
鈥?0掳C to +85掳C
MIC5010
1 Inhibit
2 NC
Control Input
R
TH
20k鈩?/div>
3 Input
4 Thresh
5 Sense
6 Source
7 Gnd
Fault 14
V+ 13
NC
12
C1 11
Com 10
C2 9
Gate 8
+
V =24V
+
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
S
43鈩?/div>
SOURCE
R
TH
=
2200
V
TRIP
鈥?000
LOAD
Note: The MIC5010 is ESD sensitive.
KELVIN
R1
4.3k鈩?/div>
For this example:
I
L
=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
April 1998
5-87
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