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FAN48623
— 2500 mA Synchronous TinyBoost® Regulator with Bypass Mode
January 2016
FAN48623 — 2500 mA, Synchronous TinyBoost®
Regulator with Bypass Mode
Features
Maximum Continuous Load Current: 2500 mA
at V
IN
of 2.5 V Boosting V
OUT
to 3.3 V
Maximum Pulse Load Current of 3.5 A for GSM PAs
(1 Slot) and PMIC support simultaneously, V
IN
=3.1 V,
V
OUT
=3.4 V
Up to 97% Efficient
4 External Components: 2520 case 0.47 µH Inductor
and 0603 Case Size Input and Output Capacitors
Input Voltage Range: 2.5 V to 5.5 V
Fixed Output Voltage Options: 3.0 V to 5.0 V
True Bypass Operation when V
IN
> Target V
OUT
Integrated Synchronous Rectifier
True Load Disconnect
Forced Bypass Mode
V
SEL
Control to Optimize Target V
OUT
Short-Circuit Protection (SCP)
Low Operating Quiescent Current
16-Bump, 1.81 mm x 1.81 mm, 0.4 mm Pitch, WLCSP
Battery
+
L1
Description
The FAN48623 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 FAN48623 is a boost regulator designed to provide a
minimum output voltage from a single-cell Li-Ion battery,
even when the battery voltage is below system minimum.
The output voltage regulation is guaranteed up to a
maximum load current of 2500 mA. The regulator transitions
smoothly between Bypass and normal Boost Mode. The
device can be forced into Bypass Mode to reduce quiescent
current.
The FAN48623 is available in a 16-bump, 0.4 mm pitch,
Wafer-Level Chip-Scale Package (WLCSP).
VIN
C
IN
10µF
VOUT
C
OUT
2x22µF
SYSTEM
LOAD
Applications
Boost for Low-Voltage Li-ion Batteries, Brownout
Prevention, System PMIC LDOs Supplies, and
2G/3G/4G RF PA Supplies
0.47µH
SW
VSEL
EN
BYP
FAN48623
PGND
AGND
PG
Smart Phones, Tablets, Portable Devices
Figure 1.
Typical Application
Ordering Information
Part Number
FAN48623UC315X
FAN48623UC32JX
FAN48623UC33X
FAN48623UC35X
FAN48623UC36FX
FAN48623UC50X
FAN48623UC50GX
Output
(1)
Voltage
V
SEL0
/ V
SEL1
3.150 / 3.330
3.20 / 3.413
3.300 / 3.489
3.5 / 3.7
3.64/ 3.709
5.000 / 5.286
5.000 / 5.190
Operating
Temperature
Package
Packing
Device
Marking
JK
JD
JE
-40°C to 85°C
16-Ball, 4x4 Array, 0.4 mm Pitch, 250 µm Ball,
Wafer-Level Chip-Scale Package (WLCSP)
Tape &
Reel
JF
JG
JL
JM
Note:
1. Other output voltages are available on request. Please contact a Fairchild Semiconductor representative.
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