FAN48632 Datasheet, PDF (1/13 Pages) Fairchild Semiconductor – 2.5 MHz, 2.0 A Pulsed-Load Synchronous TinyBoost

April 2014
FAN48632
2.5 MHz, 2.0 A Pulsed-Load Synchronous TinyBoost™
Regulator with Bypass Mode for GSM PA Supply
Features
 Few External Components: 0.47 µH Inductor and
0603 Case Size Input and Output Capacitors
 Input Voltage Range: 2.35 V to 5.5 V
 Fixed Output Voltage : 3.3 V, 3.5 V
 Maximum Continuous Load Current of: 1.5 A
at VIN of 2.6 V
 Maximum Pulsed Load current :of 2.0 A for GSM 217 Hz
repetition rate ,boosting VOUT to 3.3 V or 3.5 V
 Up to 96% Efficient
 True Bypass Operation when VIN > Target VOUT
 Internal Synchronous Rectifier
 Soft-Start with True Load Disconnect
 Forced Bypass Mode
 VSEL Control to Optimize Target VOUT
 Short-Circuit Protection
 Low Operating Quiescent Current
 16-Bump, 0.4 mm Pitch WLCSP
Applications
 Boost for Low-Voltage Li-ion Batteries, Brownout
Prevention, Supply GSM RF PA.
 Cell Phones, Smart Phones, Tablets
Description
The FAN48632 allows systems to take advantage of new
battery chemistries that can supply significant energy when
the battery voltage is lower than the required voltage for
system power ICs. By combining built-in power transistors,
synchronous rectification, and low supply current; this IC
provides a compact solution for systems using advanced
Li-Ion battery chemistries.
The FAN48632 is a boost regulator designed to provide a
minimum output voltage (VOUT(MIN)) from a single-cell Li-Ion
battery, even when the battery voltage is below system
minimum. In boost mode, output voltage regulation is
guaranteed to a maximum load current of 1.5 A continuous
and 2.0 A pulsed. Quiescent current in Shutdown Mode is less
than 3 µA, which maximizes battery life. The regulator
transitions smoothly between Bypass and normal Boost Mode.
The device can be forced into Bypass Mode to reduce
quiescent current.
The FAN48632 is available in a 16-bump, 0.4 mm pitch,
Wafer-Level Chip-Scale Package (WLCSP).
+
Battery
0.47H
VIN
CIN
10F
SW
VSEL
EN
BYP
FAN48632
VOUT
COUT
40F
PGND
AGND
PG
SYSTEM
LOAD
Figure 1. Typical Application
Ordering Information
Part Number
Output Voltage
VSEL0 / VSEL1
Soft-Start
Forced Operating
Bypass Temperature
Package
Packing
FAN48632UC33X
FAN48632BUC33X⁽¹⁾
3.30 / 3.49
3.30 / 3.49
FAST
FAST
Low IQ
Low IQ
FAN48632UC35X
3.50 / 3.70
FAST
Low IQ
Note:
1. The FAN48632BUC33X includes backside lamination.
16-Ball, 4x4 Array, 0.4 mm
-40°C to 85°C Pitch, 250 µm Ball, Wafer-Level
Chip-Scale Package (WLCSP)
Tape
and
Reel
© 2013 Fairchild Semiconductor Corporation
FAN48632 • Rev. 1.0.3
www.fairchildsemi.com