Микросхемы и комплектующие LTC3633AIUFD-2#PBF

Импульсный DC/DC стабилизатор , синхронный, 2 выхода, 3.6В до 20В вход, 6В/3А, 4.6МГц, QFN-28

The LTC3633AIUFD-2#PBF 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.

• Up to 95% Efficiency
• External frequency synchronization
• Current mode operation for excellent line and load transient response
• User Selectable Burst Mode® operation or forced continuous operation
• Output voltage tracking and soft-start capability
• Short-circuit protected
• Overvoltage input and overtemperature protection
• Power good status outputs

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