MIC4451/4452
12A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description Features
MIC4451 and MIC4452 CMOS MOSFET drivers are
BiCMOS/DMOS construction
robust, efficient, and easy to use. The MIC4451 is an
Latch-up proof: fully-isolated process is inherently
inverting driver, while the MIC4452 is a non-inverting
immune to any latch-up
driver.
Input will withstand negative swing of up to 5V
Both versions are capable of 12A (peak) output and can
Matched rise and fall times: 25ns
drive the largest MOSFETs with an improved safe
High peak output current: 12A peak
operating margin. The MIC4451/4452 accepts any logic
input from 2.4V to V without external speed-up capacitors Wide operating range: 4.5V to 18V
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or resistor networks. Proprietary circuits allow the input to
High capacitive load drive: 62,000Pf
swing negative by as much as 5V without damaging the
Low delay time: 30ns (typ.)
part. Additional circuits protect against damage from
Logic high input for any voltage from 2.4V to V
S
electrostatic discharge.
Low supply current 450A with logic 1 input
MIC4451/4452 drivers can replace three or more discrete
Low output impedance: 1.0
components, reducing PCB area requirements, simplifying
product design, and reducing assembly cost.
Output voltage swing to within 25mV of GND or V
S
Modern Bipolar/CMOS/DMOS construction guarantees
Low equivalent input capacitance (typ.): 7pF
freedom from latch-up. The rail-to-rail swing capability of
CMOS/DMOS insures adequate gate voltage to the
Applications
MOSFET during power up/down sequencing. Since these
Switch mode power supplies
devices are fabricated on a self-aligned process, they have
Motor controls
very low crossover current, run cool, use little power, and
are easy to drive.
Pulse transformer driver
Data sheets and support documentation can be found on Class-D switching amplifiers
Micrels web site at: www.micrel.com.
Line drivers
Driving MOSFET or IGBT parallel chip modules
Local power ON/OFF switch
Pulse generators
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Functional Diagram
V
S
MIC4451
0.3mA
INVERTING
0.1mA
OUT
IN 2k
MIC4452
NONINVERTING
GND
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-01200 fax + 1 (408) 474-1000 Micrel Inc. MIC4451/4452
Ordering Information
Part Number
Temperature Range Package Configuration
Standard Pb-Free
MIC4451YN 8-Pin Plastic DIP Inverting
40C to +85C
MIC4451BM MIC4451YM 8- Pin SOIC Inverting
40C to +85C
MIC4451ZT 0C to +70C 5- Pin TO-220 Inverting
MIC4452YN 40C to +85C 8- Pin Plastic DIP Non-Inverting
MIC4452BM MIC4452YM 40C to +85C 8- Pin SOIC Non-Inverting
MIC4452ZT 5- Pin TO-220 Non-Inverting
0C to +70C
MIC4452VM 40C to +125 C 8- Pin SOIC Non-Inverting
Pin Configurations
VS 1 8 VS
IN 2 7 OUT
3 6
NC OUT
GND 4 5 GND
5OUT
4GND
3VS
2GND
1IN
Pin Description
Pin Number Pin Number
Pin Name Pin Function
T0-220-5 DIP, SOIC
1 2 IN Control Input.
2, 4 4, 5 GND Ground: Duplicate Pins must be externally connected together.
3, TAB 1, 8 V Supply Input: Duplicate pins must be externally connected together.
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5 6, 7 OUT Output: Duplicate pins must be externally connected together.
3 NC Not Connected.
October 2011 2 M9999-103111-B