The LTC3548-2 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 ≤1.2mm. For channel 1, the output voltage is fixed at 1.8V/800mA; for channel 2, the output voltage is adjustable from 0.6V to VIN. Internal synchronous 0.35Ω, 1.2A/0.7A 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-Skip Mode provides low noise ripple at light loads. To further maximize battery run time, 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% * 1.8V/800mA Fixed Output and 400mA Adjustable Output Voltage * Only 40μA Quiescent Current (Both Channels) * 2.25MHz Constant Frequency Operation * High Switch Current Limits: 1.2A and 0.7A * No Schottky Diodes Required * Low RDS(ON) Internal Switches: 0.35Ω https://elecena.pl/product/258558/dual-synchronous-fixed-adjustable-output-2-25mhz-step-down-dc-dc-regulator 2007-03-04 https://elecena.pl/product/258558/dual-synchronous-fixed-adjustable-output-2-25mhz-step-down-dc-dc-regulator 2014-06-30 https://elecena.pl/product/258558/dual-synchronous-fixed-adjustable-output-2-25mhz-step-down-dc-dc-regulator 2025-01-17