LTC3850IUF#PBF

LINEAR TECHNOLOGY  LTC3850IUF#PBF  直流/直流控制器, 高性能, 2相, 4V至30V, 2路输出, 同步降压, 860kHz, QFN-28

The is a high-performance dual synchronous step-down Switching Regulator Controller that drives all N-channel power MOSFET stages. The constant-frequency current-mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and supply noise are minimized by operating the two controller output stages out of phase. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3850 features a precision 0.8V reference and a power good output indicator. A wide 4 to 24V 28V maximum/30V for LTC3850I input supply range encompasses most battery chemistries and intermediate bus voltages. Independent TK/SS pins for each controller ramp the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions.

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Dual 180° Phased controllers reduce required input capacitance and power supply induced noise

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RSENSE or DCR current sensing

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Supports pre-biased output

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Dual N-channel MOSFET synchronous drive

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Adjustable soft-start current ramping or tracking

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Foldback output current limiting

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Output overvoltage protection

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Power good output voltage monitor