LTC3633AEUFD-2#PBF

LINEAR TECHNOLOGY  LTC3633AEUFD-2#PBF  芯片, 降压稳压器, 双路, 3.6-20V, 4MHZ, 3A, 28QFN

The is a dual-channel high efficiency monolithic synchronous Buck Regulator uses a controlled on-time, current mode architecture, with phase lockable switching frequency. The two channels can run 180° out of phase to relax the requirements for input and output capacitance. The operating supply voltage range is from 3.6 to 20V, making it suitable for lithium-ion battery stacks as well as point of load power supply applications from a 12 or 5V supply. The operating frequency is programmable from 500kHz to 4MHz with an external resistor and may be synchronized to an external clock signal. The unique constant frequency/controlled on time architecture is ideal for high step-down ratio applications that operate at high frequency while demanding fast transient response. An internal phase locked loop servos the on-time of the internal one-shot timer to match the frequency of the internal clock or an applied external clock.

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Up to 95% Efficiency

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External frequency synchronization

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Current mode operation for excellent line and load transient response

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User Selectable Burst Mode® operation or forced continuous operation

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Output voltage tracking and soft-start capability

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Short-circuit protected

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Overvoltage input and overtemperature protection

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Power good status outputs