LM5100 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – High Voltage High Side and Low Side Gate Driver

January 2004
LM5100/LM5101
High Voltage High Side and Low Side Gate Driver
General Description
The LM5100/LM5101 High Voltage Gate Drivers are de-
signed to drive both the high side and the low side
N-Channel MOSFETs in a synchronous buck or a half bridge
configuration. The floating high-side driver is capable of
operating with supply voltages up to 100V. The outputs are
independently controlled with CMOS input thresholds
(LM5100) or TTL input thresholds (LM5101). An integrated
high voltage diode is provided to charge the high side gate
drive bootstrap capacitor. A robust level shifter operates at
high speed while consuming low power and providing clean
level transitions from the control logic to the high side gate
driver. Under-voltage lockout is provided on both the low
side and the high side power rails. This device is available in
the standard SOIC-8 pin and the LLP-10 pin packages.
n Bootstrap supply voltage range up to 118V DC
n Fast propagation times (25 ns typical)
n Drives 1000 pF load with 15 ns rise and fall times
n Excellent propagation delay matching (3 ns typical)
n Supply rail under-voltage lockouts
n Low power consumption
n Pin compatible with HIP2100/HIP2101
Typical Applications
n Current Fed push-pull converters
n Half and Full Bridge power converters
n Synchronous buck converters
n Two switch forward power converters
n Forward with Active Clamp converters
Features
n Drives both a high side and low side N-Channel
MOSFET
n Independent high and low driver logic inputs (TTL for
LM5101 or CMOS for LM5100)
Package
n SOIC-8
n LLP-10 (4 mm x 4 mm)
Simplified Block Diagram
FIGURE 1.
© 2004 National Semiconductor Corporation DS200888
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