l3751

6 to 75 V input voltage synchronous buck controller

L3751

Wide input voltage range synchronous DC-DC step-down controller features extreme voltage conversion ratio over switching frequency range for improved efficiency, thermals, and ripple performance

This feature-rich buck converter includes a Power Good output useful for monitoring and output voltage sequencing for digital ICs during the power-up phase. Embedded protections ensure controlled and safe operation for critical environments in telecom, networking and industrial applications.

Available in a 20-lead QFN mm package with wettable flanks, its embedded gate driver minimizes the number of external components, lowering BOM costs.

Key features

  • Wide 6 to 75 V input voltage range
  • Adjustable output voltage from 0.8 to 60V
  • 100 kHz to 1 MHz switching frequency range
  • 40 nsec minimum on-time for extreme duty ratio
  • Internal voltage monitoring
  • Thermal protection
  • Operating junction temperature range: -40 to 150°C

Application examples

Telecom, networking and industrial applications
Failsafe systems
Unregulated 24V and 48V input voltage bus
Conversion from high voltage battery to 12V and 5V rail

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