LTC3895IFE#PBF

LINEAR TECHNOLOGY  LTC3895IFE#PBF  芯片, 直流/直流控制器, 同步降压稳压器, 900KHZ, TSSOP-38 新

The is a 150V low IQ, synchronous step down DC to DC controller in 38 pin TSSOP package. This high performance step down switching regulator DC to DC controller drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140V. The gate drive voltage can be programmed from 5V to 10V to allow use of logic or standard level FETs to maximize efficiency. An integrated switch in top gate driver eliminates need for an external bootstrap diode. An internal charge pump allows for 100% duty cycle operation. The low 40µA no load quiescent current extends operating run time in battery powered systems. OPTI-LOOP compensation allows transient response to be optimized over wide range of output capacitance and ESR values. The LTC3895 features a precision 0.8V reference and power good output indicator. The output voltage can be programmed between 0.8V to 60V using external resistors or pin programmed for a fixed 5V or 3.3V.

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Wide input voltage range from 4V to 140V 150V absolute maximum

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Adjustable gate drive level from 5V to 10V OPTI-DRIVE

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Low operating current of 40µA and shutdown current of 10µA

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100% duty cycle operation and no external bootstrap diode required

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Selectable gate drive UVLO threshold and power good output voltage monitor

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Onboard LDO or external NMOS LDO for DRVCC and programmable input overvoltage lockout

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Phase lockable frequency of 75KHz to 850KHz and programmable fixed frequency of 50KHz to 900KHz

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Selectable continuous, pulse skipping or low ripple burst mode operation at light loads

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Constant frequency current mode architecture, adjustable burst clamp and current limit

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Operating temperature range from -40°C to 125°C