1 Features

• Drives Both a High-Side and Low-Side N-Channel MOSFETs
• Independent High- and Low-Driver Logic Inputs
• Bootstrap Supply Voltage up to 118 V DC
• Fast Propagation Times (25-ns Typical)
• Drives 1000-pF Load With 8-ns Rise and Fall Times
• Excellent Propagation Delay Matching (3-ns Typical)
• Supply Rail Undervoltage Lockout
• Low Power Consumption
• Pin Compatible With HIP2100/HIP2101

2 Applications

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

3 Description

The LM5100A/B/C and LM5101A/B/C high-voltage gate drivers are 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 operating with supply voltages up to 100 V. The A versions provide a full 3-A of gate drive, while the B and C versions provide 2 A and 1 A, respectively. The outputs are independently controlled with CMOS input thresholds (LM5100A/B/C) or TTL input thresholds
(LM5101A/B/C).

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. Undervoltage lockout is provided on both the low-side and the high-side power rails. These devices are available in the standard SOIC-8 pin, SO PowerPAD-8 pin, and the WSON-10 pin packages. The LM5100C and LM5101C are also available in MSOP-PowerPAD-8 package. The LM5101A is also available in WSON-8 pin package.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Block Diagram