Regulated power supply application circuit diagram

Published:2012/7/3 21:42:00 Author:Ecco | Keyword: Regulated power supply , application | From:SeekIC

Figure a, b show the application circuits of LT1619 and LT1767. Figure (a) is the application circuit of the LT1619. It is the current controller, and it can be used as step-up inductive single-ended converter and flyback converter when the external components is rare. LTl619's external components is rara, which has small size with high efficiency. LTl619 can converter the input voltage of 3.3V to 5V/2.2A output. Under heavy load, the conversion efficiency is higher than the other converters, and the voltage on the current sense resistor drops to only 5OmV with samll resistor power loss, resulting in improved conversion efficiency. When the load is light, it works with burst way to maintain high conversion efficiency. The typical operating frequency is 300kHz. When it is in synchronization with external clock, the operating frequency can get 5OOkHZ. No-load current is 14OμA, while standby current is only 15μA.



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