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LTC3852 - Synchronous Step-Down DC/DC Controller

General Description

The LTC®3852 is a constant frequency, current mode step-down DC/DC controller which can be powered by an onboard charge pump.

Key Features

  • n Charge Pump Input Range: 2.7V to 5.5V n Controller Input Range: 4V to 38V n Integrated Charge Pump Provides 5V Gate Drive to Logic Level MOSFETs n RSENSE or DCR Current Sensing n ±1.25% Output Voltage Accuracy Over Temperature n Phase-Lockable Fixed Frequency: 250kHz to 750kHz n Power Good Output Voltage Monitor n Adjustable Soft-Start Voltage Ramping n Current Foldback Disabled During Start-Up n No Reverse Current During Soft-Start n Selectable Constant Frequency, Pulse-Skipping, or Burst Mod.

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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.

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FEATURES n Charge Pump Input Range: 2.7V to 5.5V n Controller Input Range: 4V to 38V n Integrated Charge Pump Provides 5V Gate Drive to Logic Level MOSFETs n RSENSE or DCR Current Sensing n ±1.25% Output Voltage Accuracy Over Temperature n Phase-Lockable Fixed Frequency: 250kHz to 750kHz n Power Good Output Voltage Monitor n Adjustable Soft-Start Voltage Ramping n Current Foldback Disabled During Start-Up n No Reverse Current During Soft-Start n Selectable Constant Frequency, Pulse-Skipping, or Burst Mode Operation n Output Overvoltage Protection n Very Low Dropout Operation: 99% Duty Cycle n Available in a 24-Lead (3mm ¥ 5mm) QFN Package APPLICATIONS n General Purpose 3.