1 Features
1• Drives Both a High-Side and Low-Side N-Channel
MOSFET
• Independently Programmable High and Low Side
Rising Edge Delay
• Bootstrap Supply Voltage Range up to 118 V dc
• Fast Turn-Off Propagation Delay (25 ns Typical)
• Drives 1000-pF Loads with 15-ns Rise and Fall
Times
• Supply Rail Undervoltage Lockout
• Low Power Consumption
• Timer Can Be Terminated Midway Through
Sequence

2 Applications
• Current Fed Push-Pull Power Converters
• Half and Full Bridge Power Converters
• Synchronous Buck Converters
• Two Switch Forward Power Converters
• Forward with Active Clamp Converters

3 Description
The LM5102 high-voltage gate driver is designed 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 working with supply voltages up to 100 V. The
outputs are independently controlled. The rising edge
of each output can be independently delayed with a
programming resistor. 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 control logic to the high
side gate driver. Undervoltage lockout is provided on both the low side and the high side power rails. This
device is available in the standard VSSOP 10 pin and
the WSON 10 pin packages.