LTC3850IUF#PBF
数据手册.pdfLINEAR 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