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LTC3828 - Dual 2-Phase Step-Down Controller

General Description

The LTC®3828 is a dual high performance step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages.

A constant frequency current mode architecture allows for a phase-lockable frequency of up to 550kHz.

The TRCKSS pin provides both soft-start and tracking functions.

Key Features

  • n Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n Tracking for Both Outputs n Constant Frequency Current Mode Control n Wide VIN Range: 4.5V to 28V Operation n Power Good Output Voltage Indicator n Adjustable Soft-Start Current Ramping n Foldback Output Current Limiting.
  • Disabled at Start-Up n No Reverse Current During Soft-Start Interval n Clock Output for 3-, 4-, 6-Phase Operation n Dual N-Channel MOSFET Synchronous Drive n ±1% Output Vo.