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AIC1578

Analog Intergrations Corporation
Part Number AIC1578
Manufacturer Analog Intergrations Corporation
Description High-Efficiency/ Step-Down DC/DC Converter
Published Mar 23, 2005
Detailed Description AIC1578 High-Efficiency, Step-Down DC/DC Converter FEATURES • 4V to 20V Input Voltage Operation. • High Efficiency (up t...
Datasheet PDF File AIC1578 PDF File

AIC1578
AIC1578

Overview
AIC1578 High-Efficiency, Step-Down DC/DC Converter FEATURES • 4V to 20V Input Voltage Operation.
• High Efficiency (up to 95%).
• Low Quiescent Current at 90µA.
• Pulse-Skipping and Pulse-Frequency Modulation.
• Inputs-Uncommitted Current Sense Comparator.
• Duty Cycle Adjustable.
• 90KHz to 280KHz Oscillator Frequency.
• Power-Saving Shutdown Mode (8µA Typical).
• Push-Pull Driver Output.
DESCRIPTION The AIC1578 is a high performance step-down DC/DC converter, designed to drive an external P-channel MOSFET to generate programmable output voltages.
Two main schemes of PulseSkipping and Pulse-Frequency Modulation are employed to maintain low quiescent current and high conversion efficiency under wide ranges of input voltage and loading condition.
The AIC1578 delivers 10mA to 2A of output current with 87%~93% efficiency at VIN=9V, VOUT=5V condition.
A current sense comparator with both inverting and non-inverting input uncommitted is included to provide the crucial function of either cu...


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