LTC3838IUHF-1#PBF

LINEAR TECHNOLOGY  LTC3838IUHF-1#PBF  直流/直流控制器, 多相, 4.5V至38V, 2路输出, 同步降压, 2MHz, QFN-38

The is a 2-channel PolyPhase® synchronous step-down DC/DC Switching Regulator Controller has two independent channels drive all N-channel power MOSFETs. The controlled on-time, valley current-mode control architecture allows for not only fast response to transients without clock delay, but also constant frequency switching at steady load condition. Its proprietary load release transient detection feature DTR significantly reduces overshoot at low output voltages. A precision internal reference enables accurate differential output regulation. The dual channels can either provide two independent output voltages, or be combined into multiphase single-output configuration. The switching frequency can be programmed from 200kHz to 2MHz with an external resistor and can be synchronized to an external clock. Very low tON and tOFF times allow for near 0% and near 100% duty cycles, respectively. Voltage tracking soft start-up and multiple safety features are provided.

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Controlled on-time, valley current mode control

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Fast load transient response without clock delay

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Detect transient release DTR reduces VOUT overshoot

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Overvoltage protection and current limit foldback

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Power good output voltage monitor

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Output voltage tracking and adjustable soft start-up