1 Features
1• Drives Both a High-Side and Low-Side N-Channel
MOSFET
• Adaptive Rising and Falling Edges With
Programmable Additional Delay
• Single Input Control
• Bootstrap Supply Voltage Range up to 118-V DC
• Fast Turnoff Propagation Delay (25 ns Typical)
• Drives 1000-pF Loads With 15-ns Rise and Fall
Times
• Supply Rail Undervoltage Lockout
• SOIC and WSON-10 4-mm × 4-mm Package

2 Applications
• Current Fed Push-Pull Power Converters
• High Voltage Buck Regulators
• Active Clamp Forward Power Converters
• Half-Bridge and Full-Bridge Converters

3 Description
The LM5104 High-Voltage Gate Driver is designed to
drive both the high-side and the low-side N-channel
MOSFETs in a synchronous buck configuration. The
floating high-side driver can work with supply voltages
up to 100 V. The high-side and low-side gate drivers
are controlled from a single input. Each change in
state is controlled in an adaptive manner to prevent
shoot-through issues. In addition to the adaptive
transition timing, an additional delay time can be
added, proportional to an external setting resistor. An
integrated high-voltage diode is provided to charge
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.
Undervoltage lockout is provided on both the low-side
and the high-side power rails. This device is available
in the standard SOIC and the WSON packages.