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FAN48632 — 2.5 MHz, 2.0 A Pulsed-Load Synchronous TinyBoost™ Regulator with Bypass Mode for GSM PA Supply
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 V
IN
of 2.6 V
Maximum Pulsed Load current :of 2.0 A for GSM 217 Hz
repetition rate ,boosting V
OUT
to 3.3 V or 3.5 V
Up to 96% Efficient
True Bypass Operation when V
IN
> Target V
OUT
Internal Synchronous Rectifier
Soft-Start with True Load Disconnect
Forced Bypass Mode
V
SEL
Control to Optimize Target V
OUT
Short-Circuit Protection
Low Operating Quiescent Current
16-Bump, 0.4 mm Pitch WLCSP
Battery
+
L1
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 (V
OUT(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).
VIN
C
IN
10F
VOUT
C
OUT
40F
SYSTEM
LOAD
Applications
Boost for Low-Voltage Li-ion Batteries, Brownout
Prevention, Supply GSM RF PA.
Cell Phones, Smart Phones, Tablets
0.47H
SW
VSEL
EN
BYP
FAN48632
PGND
AGND
PG
Figure 1. Typical Application
Ordering Information
Part Number
FAN48632UC33X
FAN48632BUC33X
FAN48632UC35X
(1)
Output Voltage
V
SEL0
/ V
SEL1
3.30 / 3.49
3.30 / 3.49
3.50 / 3.70
Soft-Start
FAST
FAST
FAST
Forced
Operating
Bypass Temperature
Low I
Q
Low I
Q
Low I
Q
-40°C to 85°C
Package
16-Ball, 4x4 Array, 0.4 mm
Pitch, 250 µm Ball, Wafer-Level
Chip-Scale Package (WLCSP)
Packing
Tape
and
Reel
Note:
1. The FAN48632BUC33X includes backside lamination.
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Embedded System
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