LTC3892/LTC3892-1 – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller




Features

  • Wide VIN Range: 4.5V to 60V (65V Abs Max)
  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 99% • VIN
  • Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
  • No External Bootstrap Diodes Required
  • Low Operating IQ: 29μA (One Channel On)
  • Selectable Gate Drive UVLO Thresholds
  • Out-of-Phase Operation Reduces Required Input Capacitance and Power Supply Induced Noise

LTC3892 LTC3892-1 - 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC DC Controller

  • Phase-Lockable Frequency: 75kHz to 850kHz
  • Programmable Fixed Frequency: 50kHz to 900kHz
  • Selectable Continuous, Pulse Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • Selectable Current Limit (LTC3892)
  • Very Low Dropout Operation: 99% Duty Cycle
  • Power Good Output Voltage Monitors (LTC3892)
  • Low Shutdown IQ: 3.6μA
  • Small 32-Lead 5mm × 5mm QFN Package (LTC3892)
  • Small 28-Lead TSSOP Package (LTC3892-1)

Description

The LTC®3892/LTC3892-1 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. Power loss and noise are minimized by operating the two controller output stages out-of-phase.

The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs and to maximize efficiency. Internal switches in the top gate drivers eliminate the need for external bootstrap diodes.

 

For mroe detail: LTC3892/LTC3892-1 – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller




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