LTC3896HFE#PBF

LINEAR TECHNOLOGY  LTC3896HFE#PBF  芯片, 直流/直流控制器, 反相, 900KHZ, TSSOP-38 新

The is a 150V low IQ, synchronous inverting DC/DC controller in 38 pin TSSOP package. This is a high performance inverting DC/DC switching regulator controller that drives an all N-channel synchronous power MOSFET stage. It converts a wide ranging positive input voltage source to a regulated negative output that can be as much as 60V below ground. The input can operate from a voltage as low as 4V and as high as 140V- Vout. It contains true ground-referenced RUN, PLLIN and PGOOD pins, eliminating the need for external discrete level shifting components to interface with the IC. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850KHz. The low 40µA no-load quiescent current extends operating run time in battery-powered systems. The OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. It is used in telecommunications power supplies and distributed power systems.

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Wide output voltage range from -60V to -0.8V

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Ground referenced control / interface pins

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Adjustable gate drive level 5V to 10V Opti-drive

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Integrated bootstrap diode, low operating IQ of 40µA shutdown = 10µA

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Selectable gate drive UVLO thresholds, programmable input overvoltage lockout

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Onboard LDO or external NMOS LDO for DRVCC, power good output voltage monitor

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EXTVCC LDO powers drivers from output, phase-lockable frequency 75KHz to 850KHz

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Programmable fixed frequency 50KHz to 900KHz, adjustable burst clamp and current limit

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Operating temperature range from -40°C to 150°C

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Selectable continuous, pulse-skipping or Low Ripple Burst Mode operation at light loads