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.
