FAN4860 Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – 3MHz, 5V Output Synchronous TinyBoost™ Regulator

April 2010
FAN4860
3MHz, 5V Output Synchronous TinyBoost™ Regulator
Features
ƒ Operates with Very Small External Components:
1μH Inductor and 0402 Case Size Input and Output
Capacitors
ƒ Input Voltage Range from 2.3V to 4.5V
ƒ Fixed 5.0V Output Voltage
ƒ Maximum Load Current 200mA at VIN=2.3V
ƒ Maximum Load Current 300mA at VIN=3.3V
ƒ Up to 92% Efficient
ƒ Low Operating Quiescent Current
ƒ True Load Disconnect During Shutdown
ƒ Variable On-time Pulse Frequency Modulation (PFM) with
Light-Load Power-Saving Mode
ƒ Internal Synchronous Rectifier
(No External Diode Needed)
ƒ Thermal Shutdown and Overload Protection
ƒ 6-Pin 2 x 2mm UMLP
ƒ 6-Bump WLCSP, 0.4mm Pitch
Applications
ƒ USB “On the Go” 5V Supply
ƒ HDMI 5V Supply
ƒ 5V Supply for H-Bridge Motor Drivers
ƒ Powering 5V Peripherals
ƒ Supply Source for WLED Torch and Flash Lighting
ƒ PDAs, Portable Media Players
ƒ Cell Phones, Smart Phones, Portable Instruments
Description
The FAN4860 is a low-power boost regulator designed to
provide a regulated 5V output from a single cell Li-Ion
battery. The output voltage is fixed at 5.0V with a guaranteed
maximum load current of 200mA at VIN=2.3V and 300mA at
VIN=3.3V. Input current in shut-down mode is less than 1µA,
which maximizes battery life.
Light-load PFM operation is automatic and “glitch-free”. The
regulator maintains output regulation at no-load with 37µA
quiescent current.
The combination of built-in power transistors, synchronous
rectification, and low supply current make the FAN4860 ideal
for battery powered applications.
The FAN4860 is available in 6-bump 0.4mm pitch Wafer-
Level Chip Scale Package (WLCSP) and a 6-lead 2x2mm
ultra-thin MLP package.
Figure 1. Typical Application
Ordering Information
Part Number
FAN4860UC5X
FAN4860UMP5X
Operating Temperature Range
-40°C to 85°C
-40°C to 85°C
Package
WLCSP, 0.4mm Pitch
UMLP-6, 2 x 2mm
Please refer to tape and reel specifications at http://www.fairchildsemi.com/packaging.
Packing Method
Tape and Reel
Tape and Reel
© 2009 Fairchild Semiconductor Corporation
FAN4860 • Rev. 1.0.3
www.fairchildsemi.com