MIC5010
Micrel
MIC5010
Full-Featured High- or Low-Side MOSFET Driver
Not Recommended for New Designs
General Description
Features
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.
• 7V to 32V operation
• Less than 1µA standby current in the “OFF” state
• Internal charge pump to drive the gate of an N-channel
power FET above supply
• Available in small outline SOIC packages
• Internal zener clamp for gate protection
• 25µs 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
The MIC5010 charges a 1nF load in 60µs 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.
Applications
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.
• Lamp drivers
• Relay and solenoid drivers
• Heater switching
• Power bus switching
• Motion control
• Half or full H-bridge drivers
5
Typical Application
Ordering Information
Part Number Temperature Range
Package
MIC5010BN
MIC5010BM
–40°C to +85°C
–40°C to +85°C
14-pin Plastic DIP
14-pin SOIC
+
MIC5010
V =24V
1
2
3
4
5
6
7
14
13
12
11
10
9
Inhibit Fault
NC
V+
NC
C1
+
Control Input
Input
Thresh
10µF
RTH
SR(
+100mV)
VTRIP
20kΩ
RS
=
Sense Com
R I – (
+100mV)
VTRIP
L
Source
Gnd
C2
+
SRRS
V
IRCZ44
8
Gate
R1=
RTH
(S=2590,
100mV (SR+RS)
R=11mΩ)
2200
SOURCE
RS
=
–1000
SENSE
VTRIP
43Ω
LOAD
KELVIN
For this example:
Note: The MIC5010 is ESD sensitive.
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
April 1998
5-87