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LTC3548A Datasheet 2.25MHz Step-Down DC/DC Regulator

Manufacturer: Linear Technology (now Analog Devices)

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General Description

n High Efficiency: Up to 95% n Low Ripple (<35mVP-P) Burst Mode Operation;

IQ = 40μA n 2.25MHz Constant Frequency Operation n High Switch Current: 0.7A and 1.2A n No Schottky Diodes Required n Low RDS(ON) Internal Switches: 0.35Ω n Current Mode Operation for Excellent Line and Load Transient Response n Short-Circuit Protected n Low Dropout Operation: 100% Duty Cycle n Ultralow Shutdown Current: IQ <1μA n Output Voltages from 5V down to 0.6V n Power-On Reset Output n Externally Synchronizable Oscillator n Optional External Soft-Start n Small Thermally Enhanced MSOP and 3mm × 3mm DFN Packages APPLICATIONS n PDAs/Palmtop PCs n Digital Cameras n Cellular Phones n Wireless and DSL Modems The LTC®3548A is a dual, constant frequency, synchronous step-down DC/DC converter.

Intended for low power applications, it operates from a 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, enabling the use of tiny, low cost capacitors and inductors 1mm or less in height.

Overview

LTC3548A Dual Synchronous 400mA/800mA, 2.25MHz Step-Down DC/DC.

More Datasheets from Linear Technology (now Analog Devices)

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