MIC4100/1
100V Half Bridge MOSFET Drivers
General Description
The MIC4100/1 are high frequency, 100V Half Bridge
MOSFET driver ICs featuring fast 30ns propagation delay
times. The low-side and high-side gate drivers are
independently controlled and matched to within 3ns
typical. The MIC4100 has CMOS input thresholds, and the
MIC4101 has TTL input thresholds. The MIC4100/1
include a high voltage internal diode that charges the high-
side gate drive bootstrap capacitor.
A robust, high-speed, and low power level shifter provides
clean level transitions to the high side output. The robust
operation of the MIC4100/1 ensures the outputs are not
affected by supply glitches, HS ringing below ground, or
HS slewing with high speed voltage transitions. Under-
voltage protection is provided on both the low-side and
high-side drivers.
The MIC4100 is available in the SOIC-8L package with a
junction operating range from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
Bootstrap supply max voltage to 118V DC
•
Supply voltage up to 16V
•
Drives high- and low-side N-Channel MOSFETs with
independent inputs
•
CMOS input thresholds (MIC4100)
•
TTL input thresholds (MIC4101)
•
On-chip bootstrap diode
•
Fast 30ns propagation times
•
Drives 1000pF load with 10ns rise and fall times
•
Low power consumption
•
Supply under-voltage protection
•
3Ω pull up , 3Ω pull down output resistance
•
Space saving SOIC-8L package
•
–40°C to +125°C junction temperature range
Applications
•
•
•
•
High voltage buck converters
Push-pull converters
Full- and half-bridge converters
Active clamp forward converters
___________________________________________________________________________________________________________
Typical Application
9V to 16V Bias
100V Supply
VDD
HB
PWM
Controller
HI
LI
MIC4100
SO-8
HO
HS
V
OUT
GND
LO
100V Buck Regulator Solution
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2006
M9999-031506
MIC [ MIC GROUP RECTIFIERS ]
