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 u...