MIC44F18_11 Datasheet, PDF (1/17 Pages) Micrel Semiconductor – 6A, 13V High Speed MOSFET Drivers with Enable Input

MIC44F18/19/20
6A, 13V High Speed MOSFET Drivers
with Enable Input
General Description
The MIC44F18, MIC44F19 and MIC44F20 are high-
speed single MOSFET drivers capable of sinking and
sourcing 6A for driving capacitive loads. With delay
times of less than 15ns and rise times into a 1000pF
load of 10ns, these MOSFET drivers are ideal for driving
large gate charge MOSFETs in power supply
applications. The MIC44F18 is a non-inverting driver,
the MIC44F19 is an inverting driver suited for driving P-
Channel MOSFETs and the MIC44F20 is an inverting
driver for N-Channel MOSFETs.
Fabricated using Micrel’s proprietary BiCMOS/DMOS
process for low power consumption and high efficiency,
the MIC44F18/19/20 translates TTL or CMOS input logic
levels to output voltage levels that swing within 25mV of
the positive supply or ground. Comparable bipolar
devices are capable of swinging only to within 1V of the
supply.
The input supply voltage range of the MIC44F18/19/20
is 4.5V to 13.2V, making the devices suitable for driving
MOSFETs in a wide range of power applications. Other
features include an enable function, latch-up protection,
and a programmable UVLO function.
The MIC44F18/19/20 has a junction temperature range
of –40°C to +125°C with exposed pad ePAD MSOP-8
and 2mm x 2mm MLF^®-8 package options.
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
Features
• 4.5V to 13.2V input operating range
• 6A peak output current
• High accuracy ±5% enable input threshold
• High speed switching capability
ƒ 10ns rise time in 1000pF load
ƒ <15ns propagation delay time
• Flexible UVLO function
ƒ 4.2V internally set UVLO
ƒ Programmable with external resistors
• Latch-up protection to >500mA reverse current on the
output pin
• Enable function
• Thermally enhanced ePAD MSOP-8 package option
• Miniature 2mm x 2mm MLF^®-8 package option
• Pb-free packaging
Applications
• Synchronous switch-mode power supplies
• Secondary side synchronous rectification
Typical Applications
MOSFET Driver with 6.2V UVLO Externally Set
MOSFET Driver with 4.2V UVLO Internally Set
MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
February 2011
M9999-020111-B