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LTC3548 - Step-Down DC/DC Regulator

Description

The LTC®3548 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.

Features

  • n High Efficiency: Up to 95% n Very Low Quiescent Current: Only 40μA n Low Output Ripple Burst Mode® Operation 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 Ext.

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Other Datasheets by Linear Technology (Analog Devices)

Part Number Description
LTC3548-1 Fixed Output 2.25MHz Step-Down DC/DC Regulator
LTC3548-2 Step-Down DC/DC Regulator
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LTC3541 synchronous buck DC/DC converter
LTC3541-2 High Efficiency Buck + VLDO Regulator

Full PDF Text Transcription

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LTC3548 Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator FEATURES n High Efficiency: Up to 95% n Very Low Quiescent Current: Only 40μA n Low Output Ripple Burst Mode® Operation 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.
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