APL3207

APL3207
Li+ Battery Charger and Low Dropout Linear Regulator Combo
Features
General Description
•
Programmable Charge Current Up to 700mA
•
Charge Status Output Pin
The APL3207 combines a constant-current/constant-voltage linear single cell Li+ battery charger with a low drop-
•
Soft-Start Limits Inrush Current
•
4.2V Charge Termination Voltage with ±1%
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.
Accuracy
•
45mA Pre-charge Current (RSET=2k)
•
Thermal Regulation of Charge Current Simplifies
•
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
The charger of APL3207 provides 0.7A charge current
with thermal regulation protection to optimize the board
Board Design
design for compact size and typical thermal conditions.
When the junction temperature reaches the thermal regulation threshold, the charger does not shut down but simply 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
(RoHS Compliant)
quiescent current makes it ideally suit to battery-power
systems. The LDO regulator also has built-in current limit
Applications
and thermal shutdown protection.
•
PDAs
•
MP3 Players
•
Cell Phones
•
Wireless Appliances
Simplified Application Circuit
USB/Adapter 5V
BATT
VIN
Pin Configuration
Li+
Battery
ISET
STAT
BATT
VIN
BATT
GND
LDOIN
NC
1
2
3
4
5
GND
(Bottom)
10 ISET
9 GND
8 STAT
7 LDOOUT
6 LDOOUT
LDOIN
LDOOUT
3.3V
GND
APL3207
DFN-10 3x3 Top View
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.
Rev. A.3 - Sep., 2012
1
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APL3207
Ordering and Marking Information
Package Code
QA : DFN3x3-10
Operating Ambient Temperature Range
I : - 40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
L : Lead Free Device G : Halogen and Lead Free Device
APL3207
Assembly Material
Handling Code
Temperature Range
Package Code
APL3207 QA :
APL
3207
XXXXX
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020C for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Absolute Maximum Ratings
Symbol
VIN, VLDOIN
(Note 1)
Parameter
Rating
VIN, VLDOIN to GND Voltage
VSET, VSTAT, VBATT ISET, STAT, BATT to GND Voltage
ICHG
Charge Current
PD
Power Dissipation
TJ
Maximum Junction Temperature
Unit
-0.3 to 7
V
-0.3 to 7
V
800
mA
Internally Limited
TSTG
Storage Temperature Range
TSDR
Maximum Lead Soldering Temperature, 10 Seconds
W
-40 to 150
o
-65 to 150
o
260
o
C
C
C
Note1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
Thermal Characteristic
Symbol
θJA
(Note 2)
Parameter
Junction to Ambient Resistance in Free Air
DFN3x3-10
Typical Value
Unit
50
°C/W
Note 2 : θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. The exposed
pad of DFN-10 is doldered directly on the PCB.
Recommended Operating Conditions
Symbol
Range
Unit
VIN
VIN to GND Voltage
4.35 to 6.5
V
ICHG
Charge Current
0.1 to 0.7
A
VLD OIN
Parameter
(Note 3)
LDOIN to GND Voltage
3.6 to 6.5
V
ILD O
LDO Output Current
0 to 0.15
A
TA
Ambient Temperature
-40 to 85
o
TJ
Junction Temperature
-40 to 125
o
C
C
Note 3 : Refer to the typical application circuit.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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APL3207
Electrical Characteristics
Refer to the typical application circuit. These specifications apply over VIN=5V, VLDOIN=5V, TA= -40 ~ 85 oC, unless otherwise specified.
Typical values are at TA=25oC.
Symbol
Parameter
APL3207
Test Conditions
Unit
Min.
Typ.
Max.
Charge mode, RSET=10k
-
300
600
Standby mode (Charge terminated)
-
200
500
Shutdown mode (RSET not connect,
VIN<V BATT , or VIN<V UVLO )
-
25
50
IOU T=0mA
-
4
7
IOU T=150mA
-
4
10
BATT Standby Input Current
Standby mode, VBATT=4.2V
0
2.5
6
BATT Shutdown Input Current
Shutdown mode (RSET not connected)
-
-
1
BATT Sleep Input Current
Sleep mode, V IN=0V
-
-
1
3.75
3.85
3.95
V
0.15
0.20
0.30
V
-
4.20
-
V
-0.5
-
0.5
-1
-
1
BATT Pre-charge Threshold
Voltage
2.8
2.9
3.0
V
BATT Pre-charge Hysteresis
Voltage
60
80
110
mV
VIN from low to high
80
120
160
VIN from high to low
40
80
120
3.9
4.05
4.2
VSE T rising
1.15
1.21
1.3
VSE T falling
0.9
1.0
1.1
91
100
109
455
500
545
-
1
-
V
-0.7
-
0.7
%
-
2.5
-
µA
SUPPLY CURRENT
IIN
IQ
VIN Supply Current
LDO Regulator Quiescent
Current
µA
µA
BATT REVERSE CURRENT
IB ATT
µA
UNDER-VOLTAGE LOCKOUT
V UVLO
VIN UVLO Threshold
VIN rising
VIN UVLO Hysteresis
BATTERY VOLTAGE AND THRESHOLD VOLTAGE
VTERM
BATT Charge Termination
Voltage
BATT Charge Termination
Voltage Accuracy
V ASD
VIN -VBATT Lockout Threshold
Voltage
VRECHARGE
Recharge Battery Threshold
Voltage
V MSD
Manual Shutdown Threshold
Voltage
o
TA=25 C, VIN =4.35~6.5V
o
TA=-40~85 C
%
mV
V
V
BATTERY CHARGING AND PRE-CHARGE CURRENT
RSET =10k
IC HG
Charging Current
Without thermal regulation
RSET =2k
Without thermal regulation
V SET
K SET
ITERM
ISET Regulation Voltage
Without thermal regulation
ISET Regulation Voltage
Accuracy
TJ=-40~125 oC, VIN=4.35~6.5V
o
mA
ISET Pull-Up Current
VSE T=1V, TA=25 C
Charging Current Set Factor
0.1A≤ ICHG ≤0.7A
940
1000
1060
Pre-charging Current
VBATT<2.8V, RSET=2k
20
45
70
mA
C/10 Termination Current
Threshold
RSET =2k to 10k
8.5
10
11.5
%
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
3
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APL3207
Electrical Characteristics
Refer to the typical application circuit. These specifications apply over VIN=5V, VLDOIN=5V, TA= -40 ~ 85 oC, unless otherwise specified.
Typical values are at TA=25oC.
Symbol
Parameter
APL3207
Test Conditions
Unit
Min.
Typ.
Max.
-
800
1200
mΩ
-
400
600
mV
CHARGER DROPOUT VOLTAGE
Power FET On Resistance
VIN to VBATT Dropout Voltage
ICHG=0.5A, VIN=5V
STAT PIN AND THERMAL REGULATION
VSTAT
TLIM
STAT Output Low Voltage
ISTAT=5mA
-
0.35
0.6
V
STAT Off-leakage Current
VSTAT=5V
-
-
1
µA
-
120
-
o
-
100
-
µs
VBATT high to low
0.75
2
4.5
ms
ICHG falling below ICHG/10
0.4
1
2.5
ms
Thermal Regulation Threshold
C
SOFT-START AND TIMING
TSS
Charge Current Soft-Start Interval
TRECHARGE
Recharge Comparator Filter Time
TTERM
Termination Comparator Filter Time
ICHG=0A to full charging current
TA=25 oC
REGULATOR OUTPUT VOLTAGE
VLDOOUT
LDO Regulator Output Voltage
3.234
3.300
3.366
V
REGLINE
LDO Regulator Line Regulation
VLDOOUT+0.5V<VLDOIN<6V
-
2
10
mV
REGLODE
LDO Regulator Load Regulation
0mA<ILDO<150mA
-
15
30
mV
VDROP
LDO Regulator Dropout Voltage
ILDO=150mA
-
200
300
mV
PSRR
LDO Regulator Power Supply Ripple
Rejection Ratio
f=1kHz, ILDO=10mA
30
40
-
dB
LDO Regulator Output Noise
f=22KHz to 80kHz, ILDO=10mA
-
200
250
µVRMS
200
300
400
mA
40
50
60
mA
Regulator Thermal Shutdown
Temperature
-
135
-
o
Regulator Thermal Shutdown
Hysteresis
-
20
-
o
REGULATOR PROTECTION
ILIM
LDO Regulator Output Current Limit
ISHORT
LDO Regulator Short Circuit Current
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
VLDOOUT=0V
4
C
C
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APL3207
Typical Operating Characteristics
(Refer to the section “Typical Application Circuits”, VIN=5V, VLDOIN=5V, TA=25oC, unless otherwise specified)
ISET Pin Voltage vs.
Junction Temperature
ISET Pin Voltage vs. VIN Supply Voltage
1.015
1.04
VBATT = 4V
VIN = 5V
1.03
RSET = 10K
VBATT = 4V
ISET PinVoltage (V)
ISET Pin Voltage (V)
1.010
1.005
1.000
0.995
0.990
1.02
RSET = 10K
1.01
1
0.99
0.98
0.97
0.96
0.985
4
4.5
5
5.5
6
-50
-25
VIN Supply Voltage (V)
4.24
BATT Charge Termination Voltage (V)
BATT Charge Termination Voltage (V)
BATT Charge Termination Voltage
vs. VIN Supply Voltage
4.22
RSET = 10K
4.2
4.18
4.16
4.5
5
5.5
6
6.5
4.3
50
75
100
VIN = 5V
RSET = 10K
4.25
4.2
4.15
7
-25
0
25
50
75
100
Junction Temperature ( oC )
VIN Supply Voltage (V)
STAT Pin Current vs. Junction
Temperature
STAT Pin I-V Curve
20
30
25
16
STAT Pin Current (mA)
STAT Pin Sink Current (mA)
25
BATT Charge Termination Voltage vs.
Junction Temperature
4.1
-50
4.15
4
0
JunctionTemperature (oC)
20
15
10
VIN = 5V
VBATT = 4V
5
0
12
8
VIN = 5V
VBATT = 4V
VSTAT = 1V
4
0
0
1
2
3
4
5
-50
STAT Pin Voltage (V)
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
-25
0
25
50
75
100
Junction Temperature (oC )
5
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APL3207
Typical Operating Characteristics (Cont.)
(Refer to the section “Typical Application Circuits”, VIN=5V, VLDOIN=5V, TA=25oC, unless otherwise specified)
Precharge Threshold Voltage vs.
Junction Temperature
Recharge Threshold Voltage vs.
Junction Temperature
4.11
VIN = 5V
RSET = 10K
3.1
Recharge Threshold Voltage (V)
Precharge Threshold Voltage (V)
3.2
3
2.9
2.8
2.7
2.6
2.5
-50
-25
0
25
50
75
VIN = 5V
4.09
RSET = 10K
4.07
4.05
4.03
4.01
3.99
-50
100
Junction Temperature ( oC)
500
500
Charge Current (mA)
Charge Current (mA)
600
400
TA=40 oC
TA=70 oC
VIN = 5V, RSET = 2K
100
75
100
( oC )
300
TA=40 oC
200
TA=70 oC
VBATT = 4V, RSET = 2K
100
VLDOIN=VIN, ILDO=150mA
0
0
2.7
3
3.3
3.6
3.9
4.2
4
4.5
4.5
5
5.5
6
BATT Voltage (V)
VIN Supply Voltage (V)
Charge Current vs.
Ambient Temperature
Power FET On Resistance vs.
Junction Temperature
600
6.5
Power FET On Resistance (Ohm)
1.5
RSET = 2K
500
Charge Current (mA)
50
400
VLDOIN=5V, ILDO=150mA
400
300
25
Charge Current vs. VIN
Supply Voltage
600
200
0
Junction Temperature
Charge Current vs. BATT Voltage
300
-25
VIN = 5V, VBATT = 4V
VLDOIN=5V, ILDO=0mA
200
RSET = 10K
100
VIN = 4.2V
ICHG = 0.1A
1.3
1.1
0.9
0.7
0.5
0.3
0
-50
-25
0
25
50
75
100
-50
125
Ambient Temperature (oC)
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
0
50
100
150
Junction Temperature (oC)
6
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APL3207
Typical Operating Characteristics (Cont.)
(Refer to the section “Typical Application Circuits”, VIN=5V, VLDOIN=5V, TA=25oC, unless otherwise specified)
Regulator Quiescent Current vs.
LDOIN Supply Voltage
Regulator Output Voltage vs.
LDOIN Supply Voltage
3.5
4.5
ILDO = 0mA
Regulator Output Voltage (V)
Regulator Quiescent Current (µA)
5
4
3.5
3
2.5
2
1.5
1
3
ILDO = 0mA
2.5
2
1.5
1
0.5
0.5
0
0
0
1
2
3
4
5
0
6
1
LDOIN Supply Voltage (V)
Regulator Dropout Voltage vs.
Regulator Output Current
3.312
Regulator Output Voltage (V)
Regulator Dropout Voltage (V)
200
160
120
TA = 25 oC
ICHG = 0mA
80
40
25
50
75
100
3
4
5
6
125
150
Regulator Output Voltage vs.
Junction Temperature
3.31
3.308
3.306
ILDO = 0mA
3.304
3.302
3.3
3.298
3.296
-40
0
0
2
LDO Supply Voltage (V)
-20
0
20
40
60
80
100
120
Junction Temperature ( oC)
Regulator Output Current (mA)
Regulator PSRR vs. Frequency
+0
100mA
-10
Regulator PSRR(dB)
-20
-30
50mA
-40
-50
-60
1mA
-70
-80
-90
-100
10
100
1K
10K
100K
Frequency (Hz)
Copyright  ANPEC Electronics Corp.
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APL3207
Operating Waveforms
(Refer to the section “Typical Application Circuits”, the test condition is VIN=5V, TA=25oC, unless otherwise specified)
Charger Start-up
(Reconnecting RSET to GND)
VIN Power On
VSET
VIN
2
1 1
3
VSTAT
ICHG
ICHG
4 4
44
RSET = 2K, VBATT=3.8V
CH2: VSET, 2V/div, DC
CH3: VSTAT, 5V/div, DC
CH4: ICHG, 0.2A/div, DC
TIME: 0.1ms/div
RSET = 2K, VBATT=3.8V
CH1: VIN, 2V/div, DC
CH4: ICHG, 0.2A/div, DC
TIME: 0.1ms/div
Charger Shutdown
(Disconnecting RSET from GND)
LDO Line Transient Response
VSET
VLDOIN=4 to 5V
1
2
VSTAT
3
3
VLDOOUT=3.3V
ICHG
4
ILDO = 10mA
CH1: VLDOIN, 1V/div, AC
CH3: VLDOOUT, 200mV/div, AC
TIME: 0.1ms/div
RSET = 2K, VBATT=3.8V
CH2: VSET, 2V/div, DC
CH3: VSTAT, 5V/div, DC
CH4: ICHG, 0.2A/div, DC
TIME: 0.1ms/div
Copyright  ANPEC Electronics Corp.
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APL3207
Operating Waveforms (Cont.)
(Refer to the section “Typical Application Circuits”, the test condition is VLDOIN=5V, TA=25oC, unless otherwise specified)
LDO Load Transient Response
VLDOOUT
1
3
ILDO=1mA to 150mA
VLDOIN = 5V
CH1: VLDOOUT, 50mV/div, AC
CH3: ILDO, 50mA/div, DC
TIME: 0.5ms/div
Pin Description
PIN
FUNCTION
NO.
NAME
1
VIN
2
BATT
Charger Output Pin. Connect this pin to the positive terminal of a Li+ battery.
4
LDOIN
LDO Regulator Input Supply Pin. Provides power to the regulator, VLDOIN can range from 3.6V to 6.5V
and should be bypassed with at least a 1µF capacitor.
5
NC
6,7
LDOOUT
LDO Regulator Output. Fixed at 3.3V output, sourcing up to 150mA. The pin6 and pin7 must be
connected together.
8
STAT
Open-Drain Charge Status Output Pin. When the battery is charging, the STAT pin is pulled low by an
internal switch. In other states the STAT pin is in a high impedance state.
3,9
GND
Ground. Pin3 and pin9 must be connected together.
10
ISET
Charging Current Setting and Shutdown Pin. Connecting a resistor from this pin to GND set the charge
current when the VIN is powering the charger. Disconnecting the RSET from GND allows an internal
2.5µA current to pull the ISET pin high, and when the ISET pin voltage exceeds the shutdown
threshold voltage, the charger enters shutdown mode.
GND
Ground. Connect the bottom side metal pad to back side ground plane through several vias to improve
power dissipation.
Bottom
Pad
Charger Input Supply Pin. Provides power to the charger, VIN can range from 4.35V to 6.5V and should
be bypassed with at least a 1µF capacitor.
No Connection.
Copyright  ANPEC Electronics Corp.
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APL3207
Block Diagram
VIN
BATT
Constant Voltage
Loop Amp.
UVLO
1.21V
Charge Control Circuit
SHUTDOWN
Thermal
Reglation
STAT
Precharge
Comp
VIN
2.5µA
Constant
Current
Loop Amp.
2.9V
1V
1.21V
ISET
0.1V
LDOIN
Thermal Shutdown
& Current Limit
VREF
MOS Driver
LDOOUT
GND
Copyright  ANPEC Electronics Corp.
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APL3207
Typical Application Circuit
USB/Adapter 5V
1
BATT
VIN
2
C1
LED
C2
1000 V
Li+
ICHG =
Battery
RSET
10K to 100K
8
4
BATT
ISET
STAT
10
RSET:2K to 10K
ON
Q1
LDOIN
LDOOUT
6,7
OFF
3.3V
C4
C3
GND
3,9
The input power of LDO regulator is supplied by battery
USB/Adapter 5V
1
BATT
VIN
2
C2
C1
LED
Li+ ICHG =
Battery
1000 V
RSET
10K to 100K
8
Schottky Diode
4
ISET
STAT
10
RSET:2K to 10K
ON
Q1
LDOIN
LDOOUT
6,7
3.3V
OFF
C4
C3
GND
Q2
3,9
10K to 100K
BATT
When USB is present, the input power of LDO is supplied by USB
Designation
C1, C3, C4
C2
Q1
Q2
Description
1µF, 10V, X5R, 0402
Murata GRM155R61A105KE15
2.2µF, 6.3V, X5R, 0402
Murata GRM155R60J225ME15
SOT-23, N-Channel MOSFET
ANPEC APM2300CA
SOT-23, P-Channel MOSFET
ANPEC APM2301CA
Murata website: www.murata.com
Copyright  ANPEC Electronics Corp.
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APL3207
Function Description
Charge Cycle
Charge Termination Detection and Recharge
When the APL3207 is powered with a battery connected,
Charging is terminated when ICHG falls to 10% of the full
the IC firstly detects if the cell voltage is ready for full
charge current. If the battery voltage is below pre-charge
charge current set by RSET and the charger is in voltage
mode (VBATT is nearly 4.2V). The charge termination is
threshold (2.9V typ.), the device supplies 1/10 the programmed charge current. On the contrary, when the bat-
detected by monitoring the ISET pin. When the ISET pin
voltage falls below 0.1V and takes longer than TTERM (1ms,
tery voltage is over the pre-charge threshold, the device
supplies the full charge current, as programmed by RSET
typical), charging is terminated. The STAT output keeps
high state when the charger operates in standby mode.
from the ISET pin to the GND. When the battery voltage
approaches the 4.2V termination voltage, the device en-
After charge termination, the battery voltage is monitored
by the APL3207 continuously. If the battery voltage drops
ters constant-voltage mode and the full charge current
gradually decreases until the charge current drops to the
below 4.05V and takes longer than TRECHARGE (2ms, typical),
a new charge cycle starts to recharge the battery.
termination current threshold, which is equal to 1/10 full
charge current, and the IC stops charging (See Figure 1).
Manual Shutdown
ICHG
ICHG
The ISET pin provides two functions: connecting the re-
VBATT
1C
VBATT
sistor RSET from the ISET pin to the GND to set the full
charge current; and disconnecting the RSET from the GND
4.2V to shut down the charging device. Once the R
is
SET
4.05V
disconnected, an internal 2.5µA current will pull the ISET
pin high. When the ISET pin voltage reaches the 1.21V
shutdown threshold voltage, the charging device enters
3.0V
current is below 1µA. Reconnecting RSET to the GND enables the charger to operate normally. The STAT output is
0.1C
Precharge
Full Charge
shutdown mode. In shutdown mode, the charging stops,
the VIN supply current drops to 25µA and the battery drain
Constant
Voltage Mode
in high state when the charger is in shutdown mode.
Figure 1. Typical Charging Profile
Thermal Regulation
Full Charge Current Setting
The APL3207 is thermally regulated to keep the junction
The full charge current is programmed by connecting a
resistor from the the ISET pin to the ground. The full charge
temperature at 120°C. When the junction temperature
reaches 120°C, the charger does not shut down but re-
current is 1000 times of the current flowing out of the
ISET pin and can be calculated by the following equation:
duces charge current to keep the junction temperature at
120°C. This feature protects the APL3207 from exces-
ICHG =
sive temperature and allows the charger to operate with
maximum power dissipation by reducing the charge cur-
K SET × VSET
RSET
where:
VSET is ISET regulation voltage (1V, typcial).
KSET is the charge current set factor (1000, typical).
rent and optimizes the board design for compact size and
typical thermal conditions.
The charge current set factor and the ISET regulation voltage are shown in the Electrical Characteristics. The ISET
The STAT is an open-drain output. When the charger is in
charge mode, the STAT output is in pull-low state. Until
the charge current drops to the termination current
threshold, the charging stops, and the STAT output is in
high impedance state.
Charge Status Output (STAT)
regulation voltage is reduced by the thermal regulation
function.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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APL3207
Function Description (Cont.)
Charge Status Output (STAT) (Cont.)
STAT
Output
Low
High
Mode
VIN
VBATT
VIN>VUVLO
&
VBATT<4.2V
Charge mode
VIN>VBATT+
VASD
Shutdown mode VIN>VUVLO
&
VIN>VBATT+
VBATT>4.2V
Standby mode
VASD
VIN<VUVLO
Battery is
or
Sleep mode
VIN<VBATT+ connected
VASD
VSET
0.1V<VSET<1.2V
VSET>1.2V
-
Table1. STAT Pin Summary
LDO Regulator
The APL3207 has been built in a regulator whose output
voltage is fixed at 3.3V. When the system is powered by a
battery, the regulator is fully powered by the battery;
however, when the battery is charged, the regulator input
is switched to the USB or adapter (by using external circuit)
and powered by the USB or adapter, which reduces the
charging time.
Regulator Current Limit and Short Circuit
The APL3207 includes a current limit circuitry for LDO
regulator. The current limit circuitry senses the output
current and limits the maximum output current to prevent
the APL 3207 and external loads frorm being damaged.
The point where limitation occurs is ILDO=300mA (typical).
When the output is shortened to the ground, the regulator
reduces the current-limit threshold down to 50mA (typical).
The output can be shortened to the ground for an indefinite amount of time without damaging the part.
Regulator Thermal Protection
The LDO regulator has a built-in thermal protection
function. When the junction temperature exceeds +135oC,
the thermal sensor generates a logic signal to turn off the
regulator which makes the die cool down. When the junction temperature cools down by 20oC, the thermal sensor turns the regulator on again, resulting in a pulsed
output during continuous thermal protection. Thermal protection is designed to protect the IC in the event of fault
conditions.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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APL3207
Application Information
Input Capacitors
Thermal Consideration
The APL3207 requires proper input capacitors to supply
The most common measurement of package thermal
surge current during stepping load transients to prevent
the input rail from dropping. The 1µF ceramic capacitors
performance is thermal resistance measured from the
device junction to the air surrounding the package sur-
are recommended to place on the input supply pins (VIN
and VLDOIN) to the GND. Place the capacitors as close
face (θJA ). The θJA can be calculated by the following
equation:
T − TA
θJA = J
PD
where:
TJ= device junction temperature, maximum TJ=120°C
as possible to the input supply pins for well operation. In
some start-up conditions, it may necessary to protect the
device against a hot plug input voltage. Adding a 6V input
zener diode between the input supply pins and the GND
TA= ambient temperature
PD= device power dissipation
clamps the input voltage peak.
The device power dissipation, PD, is a function of the
charge rate, the LDO output current and the voltages drop
Output Capacitors
The APL3207 has two output pins, which are charger
output pin BATT and regulator 3.3V output pin LDOOUT.
across the internal FETs.
It can be calculated by the following equation:
The output capacitor of charger is recommended to use
2.2µF ceramic capacitor to ensure the battery charge
PD = ( VIN − VBATT ) × ICHG + ( VLODIN − VLDOUT ) × ILDO
stability.
PCB Layout Consideration
The output capacitor of regulator also can use ceramic
capacitor, and its proper value is between 1µF and 2.2µF,
Connecting the battery to BATT as close as possible provides accurate battery voltage sensing. The input and
ESR must above 10mΩ. Large output capacitor values
can reduce noise and improve load-transient response,
output decoupling capacitors and the programmed resistor RSET should be placed as close as possible to the
stability, and PSRR. With X5R and X7R dielectrics, 1µF is
sufficient at all operating temperatures.
device. The high current paths (VIN and LDOIN pins for
input and BATT and LDOOUT pins for output) must be
STAT Pin
short and wide to minimize voltage drop.
The STAT pin can be used to drive a LED or communicate
with the host processor to show the charge status. When
the status is displayed by a LED, which has a current
rating less than 5mA, a resistor should be selected to
connect LED in series, for programming at the desired
current value. The resistor is calculated by the following
equation:
RLED =
VIN − VLED − ON
ILED
When STAT pin is monitored by a processor, there should
be a 10kΩ to 100kΩ pull-up resistor to connect the STAT
pin and the supply voltage of the processor.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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www.anpec.com.tw
APL3207
Package Information
DFN3x3-10
D
E
A
b
Pin 1
A1
D2
A3
L
E2
Pin 1 Corner
e
S
Y
M
B
O
L
DFN3x3-10
MILLIMETERS
INCHES
MIN.
MAX.
MIN.
MAX.
A
0.80
1.00
0.031
0.039
A1
0.00
0.05
0.000
0.002
0.012
A3
0.20 REF
0.008 REF
b
0.18
0.30
0.007
D
2.90
3.10
0.114
0.122
D2
2.20
2.70
0.087
0.106
E
2.90
3.10
0.114
0.122
E2
1.40
1.75
0.055
0.069
0.50
0.012
e
0.50 BSC
L
0.30
K
0.20
0.020 BSC
0.020
0.008
Note : 1. Followed from JEDEC MO-229 VEED-5.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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APL3207
Carrier Tape & Reel Dimensions
P0
P2
P1
A
B0
W
F
E1
OD0
K0
A0
A
OD1 B
B
T
SECTION A-A
SECTION B-B
H
A
d
T1
Application
A
H
178.0±2.00 50 MIN.
DFN3x3-10
T1
C
d
D
W
E1
12.4+2.00 13.0+0.50 1.5 MIN. 20.2 MIN. 12.0±0.30 1.75±0.10
-0.00
-0.20
P0
P1
P2
D0
D1
4.0±0.10
8.0±0.10
2.0±0.05
1.5+0.10
-0.00
1.5 MIN.
T
A0
B0
F
5.5±0.05
K0
0.6+0.00
-0.40 3.30±0.20 3.30±0.20 1.30±0.20
(mm)
Devices Per Unit
Package Type
Unit
Quantity
DFN3x3-10
Tape & Reel
3000
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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APL3207
Taping Direction Information
DFN3x3-10
USER DIRECTION OF FEED
Classification Profile
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Rev. A.3 - Sep., 2012
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APL3207
Classification Reflow Profiles
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
100 °C
150 °C
60-120 seconds
150 °C
200 °C
60-120 seconds
3 °C/second max.
3 °C/second max.
183 °C
60-150 seconds
217 °C
60-150 seconds
See Classification Temp in table 1
See Classification Temp in table 2
Time (tP)** within 5°C of the specified
classification temperature (Tc)
20** seconds
30** seconds
Average ramp-down rate (Tp to Tsmax)
6 °C/second max.
6 °C/second max.
6 minutes max.
8 minutes max.
Preheat & Soak
Temperature min (Tsmin)
Temperature max (Tsmax)
Time (Tsmin to Tsmax) (ts)
Average ramp-up rate
(Tsmax to TP)
Liquidous temperature (TL)
Time at liquidous (tL)
Peak package body Temperature
(Tp)*
Time 25°C to peak temperature
* Tolerance for peak profile Temperature (Tp) is defined as a supplier minimum and a user maximum.
** Tolerance for time at peak profile temperature (tp) is defined as a supplier minimum and a user maximum.
Table 1. SnPb Eutectic Process – Classification Temperatures (Tc)
Package
Thickness
<2.5 mm
≥2.5 mm
Volume mm
<350
235 °C
220 °C
3
Volume mm
≥350
220 °C
220 °C
3
Table 2. Pb-free Process – Classification Temperatures (Tc)
Package
Thickness
<1.6 mm
1.6 mm – 2.5 mm
≥2.5 mm
Volume mm
<350
260 °C
260 °C
250 °C
3
Volume mm
350-2000
260 °C
250 °C
245 °C
3
Volume mm
>2000
260 °C
245 °C
245 °C
3
Reliability Test Program
Test item
SOLDERABILITY
HOLT
PCT
TCT
HBM
MM
Latch-Up
Method
JESD-22, B102
JESD-22, A108
JESD-22, A102
JESD-22, A104
MIL-STD-883-3015.7
JESD-22, A115
JESD 78
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
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Description
5 Sec, 245°C
1000 Hrs, Bias @ Tj=125°C
168 Hrs, 100%RH, 2atm, 121°C
500 Cycles, -65°C~150°C
VHBM≧2KV
VMM≧200V
10ms, 1tr≧100mA
www.anpec.com.tw
APL3207
Customer Service
Anpec Electronics Corp.
Head Office :
No.6, Dusing 1st Road, SBIP,
Hsin-Chu, Taiwan
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
2F, No. 11, Lane 218, Sec 2 Jhongsing Rd.,
Sindian City, Taipei County 23146, Taiwan
Tel : 886-2-2910-3838
Fax : 886-2-2917-3838
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Sep., 2012
19
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