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LTC1772B - Constant Frequency Current Mode Step-Down DC/DC Controller

Description

The LTC®1772B is a constant frequency current mode step-down DC/DC controller providing excellent AC and DC load and line regulation.

The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1772B when the input voltage falls below 2.0V.

Features

  • n Burst Mode® Operation Disabled for Lower Output Ripple at Light Loads n High Efficiency: Up to 94% n High Output Currents Easily Achieved n Wide VIN Range: 2.5V to 9.8V n Constant Frequency 550kHz Operation n Low Dropout: 100% Duty Cycle n Output Voltage Down to 0.8V n Current Mode Operation for Excellent Line and Load Transient Response n Shutdown Mode Draws Only 8µA Supply Current n Tiny 6-Lead TSOT-23 Package.

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Datasheet preview – LTC1772B

Datasheet Details

Part number LTC1772B
Manufacturer Linear
File Size 214.56 KB
Description Constant Frequency Current Mode Step-Down DC/DC Controller
Datasheet download datasheet LTC1772B Datasheet
Additional preview pages of the LTC1772B datasheet.

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Full PDF Text Transcription

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LTC1772B Constant Frequency Current Mode Step-Down DC/DC Controller in SOT-23 FEATURES n Burst Mode® Operation Disabled for Lower Output Ripple at Light Loads n High Efficiency: Up to 94% n High Output Currents Easily Achieved n Wide VIN Range: 2.5V to 9.8V n Constant Frequency 550kHz Operation n Low Dropout: 100% Duty Cycle n Output Voltage Down to 0.8V n Current Mode Operation for Excellent Line and Load Transient Response n Shutdown Mode Draws Only 8µA Supply Current n Tiny 6-Lead TSOT-23 Package APPLICATIONS n One or Two Lithium-Ion-Powered Applications n Cellular Telephones n Wireless Devices n Portable Computers n Distributed 3.3V, 2.5V or 1.
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