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LTC3899 - Buck/Buck/Boost Synchronous Controller

General Description

n Dual Buck Plus Single Boost Synchronous Controllers n Wide Bias Input Voltage Range: 4.5V to 60V n Outputs Remain in Regulation Through Cold Crank Down to a 2.2V Input Supply Voltage n Buck and Boost Output Voltages Up to 60V n Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) n No External Boot

Key Features

  • 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller.

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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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LTC3899 FEATURES 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller DESCRIPTION n Dual Buck Plus Single Boost Synchronous Controllers n Wide Bias Input Voltage Range: 4.5V to 60V n Outputs Remain in Regulation Through Cold Crank Down to a 2.2V Input Supply Voltage n Buck and Boost Output Voltages Up to 60V n Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) n No External Bootstrap Diodes Required n Low Operating IQ: 29μA (One Channel On) n 100% Duty Cycle for Boost Synchronous MOSFET n Phase-Lockable Frequency (75kHz to 850kHz) n Programmable Fixed Frequency (50kHz to 900kHz) n Very Low Dropout Operation: 99% Duty Cycle (Bucks) n Low Shutdown IQ: 3.