MIC5010 Datasheet, PDF (1/16 Pages) Micrel Semiconductor – Full-Featured High- or Low-Side MOSFET Driver

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.
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.
• 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
Applications
Other members of the Micrel driver family include the • Lamp drivers
MIC5011 minimum parts count 8 pin driver, MIC5012 dual • Relay and solenoid drivers
driver, and MIC5013 protected 8 pin driver.
• Heater switching
• Power bus switching
• Motion control
• Half or full H-bridge drivers
5
Typical Application
Ordering Information
Part Number
MIC5010BN
MIC5010BM
Temperature Range
–40°C to +85°C
–40°C to +85°C
Package
14-pin Plastic DIP
14-pin SOIC
Control Input
R_TH
20kΩ
MIC5010
1 _{Inhibit Fault} 14
2 _NC
V+ ¹³
3 _{Input NC} 12
4 _{Thresh C1} 11
5 _{Sense Com} 10
6 _{Source C2} 9
7 _{Gnd Gate} 8
V+ =24V
+
10µF
IRCZ44
(S=2590,
R=11mΩ)
Note: The MIC5010 is ESD sensitive.
SENSE
KELVIN
R_S ^SOURCE
43Ω
LOAD
R1
4.3kΩ
SR(V +100mV)
R=
TRIP
S
R
I
L
–
(V +100mV)
TRIP
R1=
V+SRR_S
100mV (SR+R_S)
2200
R_TH = _V
–1000
TRIP
For this example:
I =30A (trip current)
L
V =100mV
TRIP
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