MIC5011_05 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – Minimum Parts High- or Low-Side MOSFET Driver

MIC5011
Micrel, Inc.
MIC5011
Minimum Parts High- or Low-Side MOSFET Driver
General Description
The MIC5011 is the “minimum parts count” 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 8-pin
MIC5011 is extremely easy to use, requiring only a power
FET and nominal supply decoupling to implement either a
high- or low-side switch.
The MIC5011 charges a 1nF load in 60µs typical with no
external components. Faster switching is achieved by add-
ing two 1nF charge pump capacitors. Operation down to
4.75V allows the MIC5011 to drive standard MOSFETs in
5V low-side applications by boosting the gate voltage above
the logic supply. In addition, multiple paralleled MOSFETs
can be driven by a single MIC5011 for ultra-high current
applications.
Other members of the Micrel driver family include the
MIC5013 protected 8-pin driver.
For new designs, Micrel recommends the pin-compatible
MIC5014 MOSFET driver.
Features
• 4.75V 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
• Minimum external parts count
• Can be used to boost drive to low-side power FETs
operating on logic supplies
• 25µs typical turn-on time with optional external
capacitors
• Implements high- or low-side drivers
Applications
• Lamp drivers
• Relay and solenoid drivers
• Heater switching
• Power bus switching
Typical Applications
ON
+
10µF
Control Input
OFF
MIC5011
1 _V+
C1 ⁸
2 _{Input Com} 7
3 _{Source C2} 6
4 _{Gnd Gate} 5
14.4V
IRF531
Ordering Information
Part Number
Standard Pb-Free
MIC5011BN MIC5011YN
Temperature
Range
–40ºC to +85ºC
MIC5011BM MIC5011YM –40ºC to +85ºC
Package
8-pin Plastic
DIP
8-pin SOIC
#6014
Figure 1. High Side Driver
5V
ON _{10µF +}
Control Input
OFF
MIC5011
1 _V+
C1 ⁸
2 _{Input Com} 7
3 _{Source C2} 6
4 _{Gnd Gate} 5
48V
100W
Heater
IRF530
Figure 2. Low Side Driver
Note: The MIC5011 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
MIC5011