MIC4123 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Dual 3A-Peak Low-Side MOSFET Driver

MIC4123/4124/4125
Micrel, Inc.
MIC4123/4124/4125
Dual 3A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
The MIC4123/4124/4125 family are highly reliable BiC-
MOS/DMOS buffer/driver/MOSFET drivers. They are higher
output current versions of the MIC4126/4127/4128, which
are improved versions of the MIC4426/4427/4428. All three
families are pin-compatible. The MIC4123/4124/4125 driv-
ers are capable of giving reliable service in more demanding
electrical environments than their predecessors. They will
not latch under any conditions within their power and voltage
ratings. They can survive up to 5V of noise spiking, of either
polarity, on the ground pin. They can accept, without either
damage or logic upset, up to half an amp of reverse current
(either polarity) forced back into their outputs.
The MIC4123/4124/4125 series drivers are easier to use, more
flexible in operation, and more forgiving than other CMOS
or bipolar drivers currently available. Their BiCMOS/DMOS
construction dissipates minimum power and provides rail-to-
rail voltage swings.
Primarily intended for driving power MOSFETs, the
MIC4123/4124/4125 drivers are suitable for driving other loads
(capacitive, resistive, or inductive) which require low-imped-
ance, high peak currents, and fast switching times. Heavily
loaded clock lines, coaxial cables, or piezoelectric transducers
are some examples. The only known limitation on loading is
that total power dissipated in the driver must be kept within
the maximum power dissipation limits of the package.
Features
• Reliable, low-power bipolar/CMOS/DMOS construction
• Latch-up protected to >200mA reverse current
• Logic input withstands swing to –5V
• High 3A-peak output current
• Wide 4.5V to 20V operating range
• Drives 1800pF capacitance in 25ns
• Short <50ns typical delay time
• Delay times consistent with in supply voltage change
• Matched rise and fall times
• TTL logic input independent of supply voltage
• Low equivalent 6pF input capacitance
• Low supply current
3.5mA with logic-1 input
350µA with logic-0 input
• Low 2.3Ω typical output impedance
• Output voltage swings within 25mV of ground or V_S.
• ‘426/7/8-, ‘1426/7/8-, ‘4426/7/8-compatible pinout
• Inverting, noninverting, and differential configurations
• Exposed backside pad packaging reduces heat
ePAD SOIC-8L (θ_JA = 58°C/W)
4mm x 4mm MLF™-8L (θ_JA = 45°C/W)
Functional Diagram
0.1mA
INA
2kΩ
0.6mA
INVERTING
NONINV ERTING
V_S
Integrated Component Count:
4 Resistors
4 Capacitors
52 Transistors
O U TA
0.1mA
INB
2kΩ
0.6mA
INVERTING
NONINV ERTING
O U TB
GND
Ground Unused Inputs
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
May 2005
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M9999-052405