MIC4126/27/28
Dual 1.5A-Peak Low-Side MOSFET
Drivers in Advanced Packaging
General Description
The MIC4126, MIC4127, and MIC4128 family are highly-
reliable dual 1.5A low-side MOSFET drivers fabricated on
Micrel’s BiCMOS/DMOS process. The devices feature low
power
consumption
and
high
efficiency.
The
MIC4126/27/28 translate TTL or CMOS input logic levels to
output voltage levels that swing within 25mV of the positive
supply or ground whereas comparable bipolar devices are
capable of swinging only to within 1V of the supply. The
MIC4126/7/8 is available in three configurations: dual
inverting, dual non-inverting, and complimentary output.
The MIC4126/27/28 offer pin-compatible as well as smaller
footprint replacements for the MIC4426/27/28 with
improved packaging and electrical performance. The
MIC4126/27/28 are available in exposed pad, EPAD,
SOIC-8L and MSOP-8L options as well as a small-size
3mm x 3mm MLF™-8L option. The devices have an input
operating range of 4.5V to 20V.
Primarily intended for driving power MOSFETs,
MIC4426/7/8 drivers are suitable for driving other loads
(capacitive, resistive, or inductive) which require low-
impedance, high peak current, and fast switching time. The
devices can withstand up to 500mA of reverse current
(either polarity) without latching and up to 5V noise spikes
(either polarity) on ground pins.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
Dual 1.5A-peak drivers
•
4.5V to 20V operating range
•
Exposed backside pad packaging reduces heat
–
ePAD SOIC-8L (θ
JA
= 58°C/W)
–
ePAD MSOP-8L (θ
JA
= 60°C/W)
–
3mm x 3mm MLF™-8L (θ
JA
= 60°C/W)
•
Bipolar/CMOS/DMOS construction
–
25mV maximum output offset from supply or ground
•
Latch-up protection to >200mA reverse current
•
Switches 1000pF in 25ns
•
Logic-input threshold independent of supply voltage
•
Logic-input protection to –5V
•
6pF typical equivalent input capacitance
•
Dual inverting, dual non-inverting, and complementary
configurations
•
-40°C to +125°C operating junction temperature range
Applications
•
DC/DC converters
•
Motor drivers
•
Clock line driver
Functional Diagram
MIC4126/27/28 Block Diagram
MicroLeadFrame
and MLF are registered trademarks of Amkor Technology, Inc, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1(408) 944-0800 • fax +1(408) 474-1000 • http://www.micrel.com
July 2005
M9999-072605
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
