APL3207 Datasheet, PDF (1/19 Pages) Anpec Electronics Coropration – Li+ Battery Charger and Low Dropout Linear Regulator Combo

APL3207
Li+ Battery Charger and Low Dropout Linear Regulator Combo
Features
• Programmable Charge Current Up to 700mA
• Charge Status Output Pin
• Soft-Start Limits Inrush Current
• 4.2V Charge Termination Voltage with ±1%
Accuracy
•
45mA Pre-charge Current (R =2k)
SET
• Thermal Regulation of Charge Current Simplifies
Board Design
• Charger Enable/Disable Control
• Ultra Low Regulator Quiescent Current: 4µA
• Fixed LDO Regulator Output Voltage: 3.3V
• Low Regulator Dropout Voltage: 200mV@150mA
• LDO Regulator Current Limit Protection
• LDO Regulator Short Circuit Current Limit
• LDO Regulator Thermal Protection
• Small 3mmx3mm DFN 10-Pin (DFN-10) Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• PDAs
• MP3 Players
• Cell Phones
• Wireless Appliances
Pin Configuration
VIN 1
BATT 2
GND 3
LDOIN 4
NC 5
GND
(Bottom)
10 ISET
9 GND
8 STAT
7 LDOOUT
6 LDOOUT
APL3207
DFN-10 3x3 Top View
General Description
The APL3207 combines a constant-current/constant-volt-
age linear single cell Li+ battery charger with a low drop-
out linear regulator. Both charger and linear regulators
can work independently. The small DFN-10 package and
low external component count make the APL3207 ideally
suit to portable applications.
The charger of APL3207 provides 0.7A charge current
with thermal regulation protection to optimize the board
design for compact size and typical thermal conditions.
When the junction temperature reaches the thermal regu-
lation threshold, the charger does not shut down but sim-
ply reduces the charge current. The charge current can
be programmed by connecting an external resistor from
the ISET pin to the GND. Using an external MOSFET to
disconnect the resistor from the ground shuts down the
charger, and reduces the input current down to 25µA.
The APL3207 also has the STAT pin to indicate charge
status.
The LDO regulator of APL3207 can deliver up to 150mA
current and dropout voltage is only 200mV. The 4µA low
quiescent current makes it ideally suit to battery-power
systems. The LDO regulator also has built-in current limit
and thermal shutdown protection.
Simplified Application Circuit
USB/Adapter 5V
BATT
VIN
BATT
STAT
ISET
LDOIN
LDOOUT
GND
Li+
Battery
3.3V
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.3 - Sep., 2012
www.anpec.com.tw