LTC4063
Standalone Linear Li-Ion
Charger with Micropower
Low Dropout Linear Regulator
FeaTures
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DescripTion
The LTC
®
4063 is a standalone linear charger for single cell
lithium-ion batteries with an adjustable low dropout linear
regulator (LDO). The adjustable LDO regulates an output
voltage between 1.2V to 4.2V at up to 100mA load cur-
rent. When the input supply (wall adapter or USB supply)
is removed, the LDO regulates the output voltage without
interruption. The battery charger and LDO regulator can
be enabled individually.
No external sense resistor or external blocking diode is
required for charging due to the internal MOSFET archi-
tecture. Internal thermal feedback regulates the charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The float voltage is fixed at 4.2V and the charge current is
programmed with an external resistor. Charge termination
methods include minimum charge current or maximum
time. With power applied, the LTC4063 can be put into
shutdown mode to reduce the supply current to 35µA and
the battery drain current to less than 2µA.
Other features include smart recharge, undervoltage
lockout, LDO current limiting and a charge status pin to
indicate when the charge cycle has completed.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SmartStart, ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners. Protected by U.S. Patents
including 6522118.
Charge Current Programmable up to 1A
Integrated 100mA Adjustable Low Dropout Linear
Regulator
Charges Single Cell Li-Ion Batteries Directly from
USB Port
Preset Charge Voltage with ±0.35% Accuracy
No External MOSFET, Sense Resistor or Blocking
Diode Needed
Thermal Regulation Maximizes Charge Rate
without Risk of Overheating
Adjustable LDO Output Voltage Range:
1.2V to 4.2V
Programmable Charge Termination Timer
Programmable Charge Current Detection/Termination
SmartStart™ Prolongs Battery Life
Charge Status Output
35µA Charger Quiescent Current in Shutdown
15µA LDO Quiescent Current
Available in a Low Profile (0.75mm) 10-Lead
(3mm
×
3mm) DFN Package
applicaTions
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Handheld Computers
Portable MP3 Players
Digital Cameras
Typical applicaTion
Single Cell Li-Ion Battery Charger with Regulated 3V Output
(C/10 Termination)
V
IN
4.3V TO 8V
1µF
TIMER
PROG
IDET
715
GND
CHARGE CURRENT (mA)
700mA
V
CC
LTC4063
OUT
440k
FB
160k
2.2µF
BAT
V
OUT
3V
Complete Charge Cycle (900mAh Battery)
800
700
600
500
400
300
200
100
V
CC
= 5V
T
A
= 25°C
CONSTANT CURRENT
CONSTANT
VOLTAGE
4.75
4.50
4.25
4.00
3.75
3.50
3.25
3.00
BATTERY VOLTAGE (V)
+
4.2V
SINGLE CELL
Li-Ion BATTERY
4063 TA01a
0
2.75
0 0.25 0.50 0.75 1 1.25 1.50 1.75 2 2.25
4063 TA01b
TIME (HOURS)
4063fc
LTC4063
absoluTe MaxiMuM raTings
Input Supply Voltage (V
CC
) ........................ –0.3V to 10V
CHGEN, LDOEN, CHRG
.............................. –0.3V to 10V
FB ................................................................ –0.3V to 8V
PROG, IDET, TIMER ........................ –0.3V to V
CC
+ 0.3V
BAT, OUT...................................................... –0.3V to 8V
BAT Short-Circuit Duration ........................... Continuous
OUT Short-Circuit Duration ........................... Continuous
BAT Pin Current (Note 8) ............................................1A
Maximum Junction Temperature (Note 7) ............ 125°C
Operating Temperature Range (Note 2) ...–40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
(Note 1)
pin conFiguraTion
TOP VIEW
BAT
OUT
FB
LDOEN
CHGEN
1
2
3
4
5
11
10 V
CC
9 PROG
8 IDET
7 TIMER
6
CHRG
DD PACKAGE
10-LEAD (3mm 3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 40°C/W (NOTE 3)
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC4063EDD#PBF
TAPE AND REEL
LTC4063EDD#TRPBF
PART MARKING
LBHX
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
TEMPERATURE RANGE
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
SYMBOL
V
CC
I
CC
PARAMETER
V
CC
Supply Voltage
I
CC
Supply Current
Charge Mode (Note 4), R
PROG
= 10k
Standby Mode, Charge Terminated
Shutdown (CHGEN = 5V, V
CC
< V
BAT
or V
CC
< V
UV
)
CHGEN
= 5V and
LDOEN
= 5V
0°C ≤ T
A
≤ 85°C
R
PROG
= 10k, Constant-Current Mode
R
PROG
= 1.25k, Constant-Current Mode
Standby Mode, Charge Terminated
Shutdown Mode (CHGEN = 5V,
LDOEN
= 5V)
R
PROG
= 10k, Constant-Current Mode
R
PROG
= 1.25k, Constant-Current Mode
I
CHRG
= 5mA
V
BAT
< V
TRIKL
, R
PROG
= 10k
V
BAT
< V
TRIKL
, R
PROG
= 1.25k
V
BAT
Rising
Hysteresis
From Low to High
Hysteresis
V
CC
from Low to High, V
BAT
= 4.2V
V
CC
from High to Low, V
BAT
= 4.2V
CHGEN
Rising, 4.3V < V
CC
< 8V
Hysteresis
6
60
2.8
3.7
145
10
0.4
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l
elecTrical characTerisTics
CONDITIONS
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MIN
4.3
TYP
400
100
35
15
MAX
8
800
200
65
30
4.215
4.230
107
840
–7
±2
1.03
1.03
0.6
14
100
3
3.9
220
75
1
UNITS
V
µA
µA
µA
µA
V
V
mA
mA
µA
µA
V
V
V
mA
mA
V
mV
V
mV
mV
mV
V
mV
4063fc
V
FLOAT
I
BAT
V
BAT
Regulated Output Voltage
BAT Pin Current (Note 5)
4.185
4.170
93
760
0.97
0.97
4.2
4.2
100
800
–3.5
±1
1
1
0.35
10
80
2.9
100
3.8
200
180
45
0.7
100
V
PROG
V
CHRG
I
TRIKL
V
TRIKL
V
UV
V
ASD
V
CHGEN
PROG Pin Voltage
CHRG
Output Low Voltage
Trickle Charge Current
Trickle Charge Threshold Voltage
V
CC
Undervoltage Lockout Voltage
V
CC
– V
BAT
Lockout Threshold Voltage
CHGEN
Input Threshold Voltage
LTC4063
elecTrical characTerisTics
SYMBOL
R
CHGEN
V
CT
V
UT
I
DETECT
PARAMETER
CHGEN
Pin Pull-Down Resistor
Charge Termination Mode Threshold
Voltage
User Termination Mode Threshold Voltage
Charge Current Detection Threshold
V
TIMER
from High to Low
Hysteresis
V
TIMER
from Low to High
Hysteresis
R
DET
= 1k, 0°C ≤ T
A
≤ 85°C
R
DET
= 2k, 0°C ≤ T
A
≤ 85°C
R
DET
= 10k, 0°C ≤ T
A
≤ 85°C
R
DET
= 20k, 0°C ≤ T
A
≤ 85°C
V
FLOAT
– V
RECHRG
, 0°C ≤ T
A
≤ 85°C
Current Termination Mode
C
TIMER
= 0.1µF
I
BAT
from 0 to I
CHG
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
CONDITIONS
l
MIN
1.2
0.4
4.15
90
45
8.5
4
75
1
3
2.55
TYP
2
0.7
100
4.1
100
100
50
10
5
100
1.5
7
3
100
105
375
MAX
5
1
4.5
110
55
11.5
6
125
2.2
14
3.45
UNITS
MΩ
V
mV
V
mV
mA
mA
mA
mA
mV
ms
ms
Hour
µs
°C
mΩ
∆V
RECHRG
t
TERM
t
RECHRG
t
TIMER
t
SS
T
LIM
R
ON
V
BAT-LDO
I
BAT-LDO
Recharge Threshold Voltage
Termination Comparator Filter Time
Recharge Comparator Filter Time
Charge Cycle Time
Soft-Start Time
Junction Temperature in Constant
Temperature Mode
Power FET On-Resistance
(Between V
CC
and BAT)
LDO Supply Voltage (BAT)
LDO Supply Current (from BAT)
2.65
V
CC
< V
BAT
, I
OUT
= 0mA
V
CC
> V
BAT
, I
OUT
= 0mA (Note 6)
V
BAT
= 4.4V
V
BAT
= 3.7V, I
OUT
= 1mA
V
BAT
= 2.65V to 4.4V, I
OUT
= 1mA
I
OUT
= 1mA to 100mA, V
BAT
= 4.4V
LDOEN
Rising, V
BAT
= 4.4V
Hysteresis
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4.4
15
9
2.5
25
18
5
816
4
4
1
5
200
2.65
25
V
µA
µA
µA
mV
mV
mV
V
mV
MΩ
mV
V
mV
nA
mA
µV
RMS
I
BAT-LDO-SD
LDO Supply Current in Shutdown
V
FB
V
FB(LINE)
V
FB(LOAD)
V
LDOEN
R
LDOEN
V
DO
V
LDOUVLO
I
FB
I
SC
V
NO(RMS)
FB Regulated Voltage
V
FB
Line Regulation
V
FB
Load Regulation
LDOEN
Input Threshold Voltage (Rising)
LDOEN
Pin Pull-Down Resistor
LDO Dropout Voltage
LDO Undervoltage Lockout Threshold
FB Pin Current
Short-Circuit Output Current
Output Voltage Noise
784
800
1
1
0.4
1.2
2.45
–25
0.7
100
2
125
2.55
100
0
500
135
I
OUT
= 100mA, V
OUT
= 3V
V
BAT
from High to Low
Hysteresis
V
OUT
= 0V
V
OUT
= 3V, I
OUT
= 100mA, C
OUT
= 2.2µF
,
10Hz ≤ f ≤ 100kHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC4063EDD is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3:
Failure to correctly solder the Exposed Pad of the package to the
PC board will result in a thermal resistance much higher than 40°C/W.
Note 4:
Supply current includes PROG pin current and IDET pin current
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
Note 5:
Does not include LDO supply current.
Note 6:
The LDO is partially powered from V
CC
, thus reducing the supply
current from the BAT pin.
Note 7:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Overtemperature protection will become active at a junction temperature
greater than the maximum operating temperature. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
Note 8:
Defined by long term current density limitations.
4063fc
LTC4063
Typical perForMance characTerisTics
Regulated Output (Float) Voltage
vs Charge Current
4.26
4.24
4.22
V
FLOAT
(V)
V
FLOAT
(V)
4.20
4.18
4.16
4.14
4.12
4.10
0
100 200 300 400 500 600 700 800
CHARGE CURRENT (mA)
4063 G01
T
A
= 25°C, unless otherwise noted.
PROG Pin Voltage vs Temperature
(Constant-Current Mode)
1.006
1.004
R
PROG
= 10k
Regulated Output (Float) Voltage
vs Temperature
4.215
4.210
4.205
4.200
4.195
4.190
4.185
–50
V
CC
= 8V
V
PROG
(V)
R
PROG
= 10k
V
CC
= 5V
R
PROG
= 1.25k
1.002
1.000
0.998
0.996
0.994
–50
V
CC
= 8V
V
CC
= 4.3V
V
CC
= 4.3V
–25
0
25
50
TEMPERATURE (°C)
75
100
4063 G02
–25
0
25
50
TEMPERATURE (°C)
75
100
4063 G03
Charge Current
vs PROG Pin Voltage
900
800
700
600
I
BAT
(mA)
500
400
300
200
100
0
0
0.2
0.4
0.6
V
PROG
(V)
0.8
1.0
1.2
4063 G04
Internal Charge Timer
vs Temperature
195
190
t
TIMER
(MINUTES)
185
180
175
170
165
–50 –25
V
CC
= 4.3V
I
CHRG
(mA)
C
TIMER
= 0.1µF
35
30
25
20
15
10
5
50
25
75
0
TEMPERATURE (°C)
100
125
0
CHRG Pin I-V Curve
V
CC
= 5V
V
BAT
= 4V
T
A
= –40°C
T
A
= 25°C
T
A
= 90°C
V
CC
= 5V
R
PROG
= 1.25k
V
TIMER
= 5V
V
CC
= 8V
0
1
2
4063 G05
4
3
V
CHRG
(V)
5
6
7
4063 G06
Trickle Charge Current
vs Temperature
90
88
86
I
TRIKL
(mA)
84
82
80
78
76
–50
–25
50
25
0
TEMPERATURE (°C)
75
100
4063 G07
Trickle Charge Threshold Voltage
vs Temperature
2.96
2.94
2.92
V
TRIKL
(V)
2.90
2.88
2.86
2.84
–50
I
BAT
(mA)
600
V
CC
= 5V
R
PROG
= 1.25k
1000
Charge Current vs Battery Voltage
V
CC
= 5V
V
BAT
= 2.5V
R
PROG
= 1.25k
800
400
200
0
V
CC
= 5V
R
PROG
= 1.25k
JA
= 40 C/W
2.7
3
3.3
3.6
3.9
V
BAT
(V)
4.2
4.5
4063 G09
–25
0
25
50
TEMPERATURE (°C)
75
100
4063 G08
4063fc
LTC4063
Typical perForMance characTerisTics
Charge Current
vs Ambient Temperature
1000
ONSET OF THERMAL
REGULATION
R
PROG
= 1.25k
700
I
BAT
(mA)
I
BAT
(mA)
600
R
PROG
= 2k
600
500
400
300
ONSET OF THERMAL
REGULATION
900
800
T
A
= 25°C, unless otherwise noted.
Recharge Threshold Voltage
vs Temperature
4.16
4.14
4.12
4.10
4.08
4.06
4.04
–50
V
CC
= 4.3V
V
CC
= 8V
Charge Current vs Supply Voltage
R
PROG
= 1.25k
V
BAT
= 3.3V
JA
= 35°C/W
T
A
= 25°C
V
RECHRG
(V)
800
400
200 V = 5V
CC
V
BAT
= 4V
JA
= 40°C/W
0
50
0
75
25
–50 –25
TEMPERATURE (°C)
100
125
4
4.5
5
5.5
6
V
CC
(V)
6.5
7
7.5
8
–25
0
25
50
TEMPERATURE ( C)
75
100
4063 G12
4063 G10
4063 G11
Power FET On-Resistance
vs Temperature
650
600
550
500
450
400
350
–50 –25
I
CC
(µA)
V
BAT
= 4V
I
BAT
= 200mA
R
PROG
= 1.25k
70
60
50
40
30
20
10
50
25
75
0
TEMPERATURE (°C)
100
125
Shutdown Current vs Temperature
CHGEN
= V
CC
LDOEN
= 0V
900
V
CC
= 8V
850
800
750
700
650
CHGEN Pin Threshold Voltage
(On-to-Off) vs Temperature
V
CC
= 5V
R
DS(ON)
(m )
V
CC
= 5V
V
CC
= 4.3V
V
CHGEN
(mV)
0
–50
–25
4063 G13
50
25
0
TEMPERATURE (°C)
75
100
4063 G14
600
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
4063 G15
CHGEN Pin Pull-Down Resistance
vs Temperature
3.0
2.8
2.6
R
CHGEN
(M )
V
FB
(mV)
2.4
2.2
2.0
1.8
1.6
–50
–25
50
25
0
TEMPERATURE (°C)
75
100
4063 G16
FB Pin Regulated Voltage
vs Output Current
803
802
801
V
FB
(V)
800
799
T
A
= –40°C
798
797
T
A
= 115°C
T
A
= 25°C
T
A
= 90°C
V
BAT
= 4.2V
803
802
801
800
799
798
FB Pin Regulated Voltage
vs Temperature
I
LOAD
= 1mA
V
BAT
= 4.2V
V
BAT
= 2.65V
0
20
40
60
80
I
OUT
(mA)
100
120
797
–50 –25
4063 G17
50
25
75
0
TEMPERATURE (°C)
100
125
4063 G18
4063fc
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