LTC3787EGN#PBF

LINEAR TECHNOLOGY  LTC3787EGN#PBF  直流/直流控制器, 多相, 4.5V至38V, 1路输出, 同步升压, 900kHz, SSOP-28

The is a high-performance PolyPhase single output synchronous boost Converter Controller that drives two N-channel power MOSFET stages out-of-phase. Multiphase operation reduces input and output capacitor requirements and allows the use of smaller inductors than the single-phase equivalent. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, enabling high power boost applications. A 4.5 to 38V input supply range encompasses a wide range of system architectures and battery chemistries. When biased from the output of the boost converter or another auxiliary supply, it can operate from an input supply as low as 2.5V after start-up. The operating frequency can be set for a 50 to 900kHz range or synchronized to an external clock using the internal PLL. PolyPhase operation allows the LTC3787 to be configured for 2-, 3-, 4-, 6- and 12-phase operation. The SS pin ramps the output voltage during start-up.

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2-phase Operation reduces required input and output capacitance and power supply induced noise

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Synchronous operation for highest efficiency and reduced heat dissipation

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±1% 1.2V Reference voltage

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RSENSE or inductor DCR current sensing

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<8µA Low shutdown current

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Internal LDO powers gate drive from VBIAS or EXTVCC