FAN4855 Datasheet High Efficiency Boost Regulator

Manufacturer: Fairchild (now onsemi)

Overview: www.DataSheet4U.com FAN4855 500mA High Efﬁciency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect December 2005 FAN4855 500mA High Efﬁciency Boost Regulator with Adjustable Output, Shutdown and.

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FAN4855 high efficiency boost regulator by Fairchild (now onsemi) - Datasheet Preview

Datasheet Details

Part number	FAN4855
Manufacturer	Fairchild (now onsemi)
File Size	552.77 KB
Description	High Efficiency Boost Regulator
Download	FAN4855 Download (PDF)

General Description

The FAN4855 is a low power boost regulator designed for low voltage DC to DC conversion in 2-cell battery powered systems such as digital cameras, cell phones and PDAs.

The converter starts-up at 1.3V and operates after the start at an input voltage as low as 1V.

Output voltage can be adjusted by external resistors from 3.3V to 5V with a maximum load current of 0.5A.

Key Features

Low power PFM boost regulator.
Input voltage range is from 1.6V to 4.5V.
Output voltage range is from 3V to 5V.
500mA maximum load current capability.
95% efﬁcient power conversion.
2-3 cell and single cell Li-Ion systems.
Variable on-time Pulse Frequency Modulation (PFM).
Internal synchronous rectiﬁer (no need for external General.

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