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LTC3612 - 4MHz Monolithic Synchronous Step-Down DC/DC Converter

Description

The LTC®3612 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture.

The no-load DC supply current in sleep mode is only 70µA while maintaining the output voltage (Burst Mode operation) at no load, dropping to zero current in shutdown.

Features

  • n 3A Output Current n 2.25V to 5.5V Input Voltage Range n Low Output Ripple Burst Mode® Operation: IQ = 70µA n ±1% Output Voltage Accuracy n Output Voltage Down to 0.6V n High Efficiency: Up to 95% n Low Dropout Operation: 100% Duty Cycle n Shutdown Current: ≤1µA n Adjustable Switching Frequency: Up to 4MHz n Optional Active Voltage Positioning (AVP) with Internal Compensation n Selectable Pulse-Skipping/Forced Continuous/ Burst Mode Operation with Adjustable Burst Clamp n Programmable Soft-Star.

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Full PDF Text Transcription

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LTC3612 Features n 3A Output Current n 2.25V to 5.5V Input Voltage Range n Low Output Ripple Burst Mode® Operation: IQ = 70µA n ±1% Output Voltage Accuracy n Output Voltage Down to 0.6V n High Efficiency: Up to 95% n Low Dropout Operation: 100% Duty Cycle n Shutdown Current: ≤1µA n Adjustable Switching Frequency: Up to 4MHz n Optional Active Voltage Positioning (AVP) with Internal Compensation n Selectable Pulse-Skipping/Forced Continuous/ Burst Mode Operation with Adjustable Burst Clamp n Programmable Soft-Start n Inputs for Start-Up Tracking or External Reference n DDR Memory Mode, IOUT = ±1.
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