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LTC7818 - Buck/Buck/Boost Synchronous Controller

General Description

The LTC®7818 is a high performance triple output (buck/ buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages.

Its constant-frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz.

Key Features

  • n Dual Buck Plus Single Boost Synchronous Controllers n Low Operating IQ: n 14μA (14V to 3.3V, Channel 1 On) n Outputs Remain in Regulation Through Cold Crank Down to 1V Input Supply Voltage n Wide Bias Input Voltage Range: 4.5V to 40V n Buck and Boost Output Voltages Up to 40V n Spread Spectrum Operation n RSENSE or DCR Current Sensing n Programmable Fixed Frequency (100kHz to 3MHz) n PassThru™/100% Duty Cycle Capable for Synchronous Boost MOSFET n Phase-Lockable Frequency (100kHz to 3MHz) n Se.

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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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LTC7818 40V, Low IQ, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller FEATURES n Dual Buck Plus Single Boost Synchronous Controllers n Low Operating IQ: n 14μA (14V to 3.3V, Channel 1 On) n Outputs Remain in Regulation Through Cold Crank Down to 1V Input Supply Voltage n Wide Bias Input Voltage Range: 4.5V to 40V n Buck and Boost Output Voltages Up to 40V n Spread Spectrum Operation n RSENSE or DCR Current Sensing n Programmable Fixed Frequency (100kHz to 3MHz) n PassThru™/100% Duty Cycle Capable for Synchronous Boost MOSFET n Phase-Lockable Frequency (100kHz to 3MHz) n Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode Operation at Light Loads n Boost Channel Current Monitor Output n Low Shutdown IQ: 1.