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1 Features

1? Easy-to-Use Control Methodology

? 0.8 V to V IN Adjustable Output Range

? High Efficiency (90% Typical)

? ±0.9% (±1.5% Over Temperature) Feedback

Voltage

? 100% Duty Cycle Capable

? Maximum Operating Frequency up to 2 MHz

? Internal Soft-Start

? Enable Pin

2 Applications

? TFT Monitor

? Auto PC

? Vehicle Security

? Navigation Systems

? Notebook Standby Supply

? Battery Powered Portable Applications

? Distributed Power Systems

3 Description

The LM3475 is a hysteretic P-FET buck controller

designed to support a wide range of high efficiency

applications in a very small SOT-23-5 package. The

hysteretic control scheme has several advantages,

including simple system design with no external

compensation, stable operation with a wide range of

components, and extremely fast transient response. Hysteretic control also provides high efficiency

operation, even at light loads. The PFET architecture

allows for low component count as well as 100% duty

cycle and ultra-low dropout operation.