The LTC3548 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 0.7A/1.2A power switches provide high efficiency without the need for external Schottky diodes. A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode operation provides high efficiency at light loads, while Pulse-Skipping Mode provides low noise ripple at light loads. To further maximize battery runtime, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40μA. In shutdown, the device draws <1μA. Features LTC3548A Improved Burst Mode, Improved ESD, 2 Adjustable Outputs LTC3548-2 One Fixed 1.8V Output, 1 Adjustable LTC3548-1 Fixed 1.8V and 1.575V Outputs LTC3548 2 Adjustable Outputs Applications * PDAs/Palmtop PCs * Digital Cameras * Cellular Phones * Portable Media Players * PC Cards * Wireless and DSL Modems * High Efficiency: Up to 95% * Very Low Quiescent Current: Only 40μA * Low Output Ripple Burst Mode® Operation * 2.25MHz Constant Frequency Operation * High Switch Current: 0.7A and 1.2A * No Schottky Diodes Required * Low RDS(ON) Internal Switches: 0.35Ω * Current Mode Operation for Excellent Line and Load Transient Response https://elecena.pl/product/258513/dual-synchronous-400ma-800ma-2-25mhz-step-down-dc-dc-regulator 2007-03-04 https://elecena.pl/product/258513/dual-synchronous-400ma-800ma-2-25mhz-step-down-dc-dc-regulator 2017-10-09 https://elecena.pl/product/258513/dual-synchronous-400ma-800ma-2-25mhz-step-down-dc-dc-regulator 2025-01-19