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LTC3851 - Synchronous Step-Down Switching Regulator Controller

General Description

The LTC®3851 is a high performance synchronous step-down switching regulator controller that drives an all N-channel synchronous power MOSFET stage.

A constant frequency current mode architecture allows a phase-lockable frequency of up to 750kHz.

Key Features

  • n Wide VIN Range: 4V to 38V Operation n RSENSE or DCR Current Sensing n ±1% Output Voltage Accuracy n Phase-Lockable Fixed Frequency: 250kHz to 750kHz n Dual N-Channel MOSFET Synchronous Drive n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Output Voltage Soft-Start or Tracking n Output Current Foldback Limiting n Output Overvoltage Protection n 5V Internal Regulator n OPTI-LOOP® Compensation Minimizes COUT n Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads.

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📁 Similar Datasheet

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Other Datasheets by Linear Technology (now Analog Devices)

Part Number Description
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
FEATURES n Wide VIN Range: 4V to 38V Operation n RSENSE or DCR Current Sensing n ±1% Output Voltage Accuracy n Phase-Lockable Fixed Frequency: 250kHz to 750kHz n Dual N-Channel MOSFET Synchronous Drive n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Output Voltage Soft-Start or Tracking n Output Current Foldback Limiting n Output Overvoltage Protection n 5V Internal Regulator n OPTI-LOOP® Compensation Minimizes COUT n Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads n Low Shutdown IQ: 20μA n VOUT Range: 0.8V to 5.