LTC4054L-4.2
150mA Standalone Linear
Li-Ion Battery Charger in ThinSOT
DESCRIPTIO
The LTC
®
4054L is a complete, constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its small size and ability to regulate low charge currents
make the LTC4054L especially well-suited for portable
applications using low capacity rechargeable lithium-ion
coin cells. Furthermore, the LTC4054L is specifically de-
signed to work within USB power specifications.
No external sense resistor is needed, and no blocking di-
ode is required due to the internal MOSFET architecture.
Thermal feedback regulates the charge current to eliminate
thermal overdesign. The charge voltage is fixed at 4.2V, and
the charge current can be programmed externally with a
single resistor. The LTC4054L automatically terminates a
charge cycle when the charge current drops to 1/10th the
programmed value after the final float voltage is reached.
When the input supply (wall adapter or USB supply) is
removed, the LTC4054L automatically enters a low cur-
rent state, dropping the battery drain current to less than
2µA. The LTC4054L can be put into shutdown mode, re-
ducing the supply current to 25µA.
Other features include charge current monitor, undervoltage
lockout, automatic recharge and a status pin to indicate
charge termination and the presence of an input voltage.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
*U.S. Patent No. 6,522,118
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
Programmable Charge Current Range:
10mA to 150mA
No External MOSFET, Sense Resistor or Blocking
Diode Required
Complete Linear Charger in ThinSOT
TM
Package for
Single Cell/Coin Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage Operation with
Thermal Regulation* to Maximize Charge Rate
Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
from USB Port
Preset 4.2V Charge Voltage with
±1%
Accuracy
Charge Current Monitor Output for Gas Gauging*
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25µA Max Supply Current in Shutdown Mode
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available in a 6-Lead Low Profile (1mm)
SOT-23 Package
APPLICATIO S
s
s
s
s
Charger for Li-Ion Coin Cell Batteries
Portable MP3 Players, Wireless Headsets
Bluetooth Applications
Multifunction Wristwatches
TYPICAL APPLICATIO
V
IN
4.5V TO 6.5V
1µF
Complete Charge Cycle (130mAh Battery)
100
4.4
CONSTANT
CURRENT
4.3
CONSTANT
VOLTAGE
4.2
BATTERY VOLTAGE (V)
90mA Li-Ion Single Coin Cell Charger
CHARGE CURRENT (mA)
90
80
70
60
50
40
30
20
10
0
4
BAT
LTC4054L-4.2
PROG
GND
2
V
CC
3
90mA
5
1.69k
4.2V
COIN CELL
Li-Ion
BATTERY
4054l42 TA01
3.4
0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25
TIME (HOURS)
4054l42 TA01b
V
CC
= 5V
θ
JA
= 130°C/W
R
PROG
= 1.69k
T
A
= 25°C
U
U
U
4.1
4.0
3.9
3.8
3.7
3.6
3.5
4054l42f
1
LTC4054L-4.2
TYPICAL PERFOR A CE CHARACTERISTICS
CHRG Pin Current vs Temperature
(Weak Pull-Down State)
28
V
CC
= 5V
V
BAT
= 4.3V
25 V
CHRG
= 5V
22
I
TRKL
(mA)
9
V
CC
= 5V
V
BAT
= 2.5V
6
I
TRKL
(mA)
I
CHRG
(µA)
19
16
13
10
–50
–25
0
25
50
TEMPERATURE (°C)
Trickle Charge Threshold
vs Temperature
V
CC
= 5V
2.975 R
PROG
= 1k
2.950
3.000
V
TRKL
(V)
I
BAT
(mA)
2.900
2.875
2.850
2.825
2.800
–50
80
I
BAT
(mA)
2.925
–25
50
25
TEMPERATURE (°C)
0
Charge Current
vs Ambient Temperature
180
R
PROG
= 1k
150
120
I
BAT
(mA)
4.11
4.09
R
DS(ON)
(mΩ)
V
RECHRG
(V)
ONSET OF
THERMAL
REGULATION
V
BAT
= 4V
90 V
CC
= 5V
θ
JA
= 125°C/W
60
30
R
PROG
= 15k
0
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
U W
75
4054L G13
Trickle Charge Current
vs Temperature
15
R
PROG
= 1k
12
12
15
Trickle Charge Current
vs Supply Voltage
R
PROG
= 1k
9
V
BAT
= 2.5V
T
A
= 25°C
6
3
R
PROG
= 15k
100
0
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
3
R
PROG
= 15k
0
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
4054L G14
4054L G15
Charge Current vs Battery Voltage
160
200
Charge Current vs Supply Voltage
V
BAT
= 4V
T
A
= 25°C
θ
JA
= 125°C/W
R
PROG
= 1k
120
V
CC
= 5V
R
PROG
= 1k
T
A
= 25°C
θ
JA
= 125°C/W
160
120
80
40
40
R
PROG
= 15k
0
75
100
4054L G16
2.7
3.0
3.3
3.6
3.9
V
BAT
(V)
4.2
4.5
0
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
4054L G17
4054L G18
Recharge Voltage Threshold
vs Temperature
1.8
Power FET “ON” Resistance
vs Temperature
V
CC
= 4.1V
V
BAT
= 4V
R
PROG
= 1k
V
CC
= 5V
R
PROG
= 1k
1.6
4.07
4.05
4.03
4.01
3.99
–50
1.4
1.2
1.0
–25
0
25
50
TEMPERATURE (°C)
75
100
0.8
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
4054L G19
4054L G20
4054L G21
4054l42f
5
LTC4054L-4.2
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
CHRG 1
GND 2
BAT 3
4 V
CC
5 PROG
Input Supply Voltage (V
CC
) ....................... –0.3V to 10V
PROG ............................................. – 0.3V to V
CC
+ 0.3V
CHRG ........................................................ –0.3V to 10V
BAT ............................................................. – 0.3V to 7V
BAT Short-Circuit Duration .......................... Continuous
BAT Pin Current ................................................. 200mA
PROG Pin Current ................................................ 1.5mA
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LTC4054LES5-4.2
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 80°C/ W TO 150°C/W
DEPENDING ON PC BOARD LAYOUT (NOTE 3)
S5 PART MARKING
LTAFA
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
q
denotes 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
Supply Voltage
Supply Current
Charge Mode (Note 4), R
PROG
= 1k
Standby Mode (Charge Terminated)
Shutdown Mode (R
PROG
Not Connected,
V
CC
< V
BAT
, or V
CC
< V
UV
)
0°C
≤
T
A
≤
85°C, I
BAT
= 40mA
R
PROG
= 15k, Current Mode
R
PROG
= 1k, Current Mode
Standby Mode, V
BAT
= 4.2V
Shutdown Mode (R
PROG
Not Connected)
Sleep Mode, V
CC
= 0V
R
PROG
= 15k, V
BAT
Rising
R
PROG
= 15k
From V
CC
Low to High
PROG Pin Rising
PROG Pin Falling
V
CC
from Low to High
V
CC
from High to Low
R
PROG
= 15k (I
BAT
= 10mA) (Note 5)
R
PROG
= 1k (I
BAT
= 150mA) (Note 5)
R
PROG
= 1k, Current Mode
V
CHRG
= 5V
I
CHRG
= 5mA
V
FLOAT
– V
RECHRG
100
q
q
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
q
q
q
q
MIN
4.25
TYP
1200
200
25
MAX
6.5
2000
500
50
4.242
10.7
157.5
–6
±2
±2
25
3
110
3.92
300
1.30
1.1
140
50
0.115
0.112
1.07
35
0.6
200
UNITS
V
µA
µA
µA
V
mA
mA
µA
µA
µA
mA
V
mV
V
mV
V
V
mV
mV
mA/mA
mA/mA
V
µA
V
mV
V
FLOAT
I
BAT
Regulated Output (Float) Voltage
BAT Pin Current
4.158
9.3
142.5
0
4.2
10
150
–2.5
±1
±1
15
2.9
80
3.8
200
1.21
1.0
100
30
0.10
0.10
1
20
0.35
150
I
TRIKL
V
TRIKL
V
TRHYS
V
UV
V
UVHYS
V
MSD
V
ASD
I
TERM
V
PROG
I
CHRG
V
CHRG
∆V
RECHRG
Trickle Charge Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
V
CC
Undervoltage Lockout Threshold Voltage
V
CC
Undervoltage Lockout Hysteresis Voltage
Manual Shutdown Threshold Voltage
V
CC
– V
BAT
Lockout Threshold Voltage
C/10 Termination Current Threshold
PROG Pin Voltage
CHRG Pin Weak Pull-Down Current
CHRG Pin Output Low Voltage
Recharge Battery Hysteresis Voltage
V
BAT
< V
TRIKL
, R
PROG
= 1k (I
BAT
= 150mA)
q
5
2.8
60
3.7
150
1.15
0.9
70
5
0.085
0.088
0.93
8
4054l42f
2
U
W
U
U
W W
W
LTC4054L-4.2
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
SYMBOL
T
LIM
R
ON
t
SS
t
RECHARGE
t
TERM
I
PROG
PARAMETER
Junction Temperature in Constant
Temperature Mode
Power FET “ON” Resistance
(Between V
CC
and BAT)
Soft-Start Time
Recharge Comparator Filter Time
Termination Comparator Filter Time
PROG Pin Pull-Up Current
I
BAT
= 0 to I
BAT
=150V/R
PROG
V
BAT
High to Low
I
BAT
Drops Below I
CHG
/10
0.75
400
1.5
CONDITIONS
MIN
TYP
120
1.5
100
2
1000
3
4.5
2500
5
MAX
UNITS
°C
Ω
µs
ms
µs
µA
ELECTRICAL CHARACTERISTICS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2:
The LTC4054LE-4.2 is guaranteed to meet performance specifica-
tions 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:
See Thermal Considerations.
Note 4:
Supply current includes PROG pin current (≈1mA) but does not
include any current delivered to the battery through the BAT pin.
Note 5:
I
TERM
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Voltage vs Supply
Voltage (Constant Current Mode)
1.0100
1.0075
1.0050
V
PROG
(V)
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
V
PROG
(V)
I
BAT
(mA)
1.0025
R
PROG
= 1k
R
PROG
= 15k
1.0000
0.9975
0.9950
0.9925
0.9900
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
U W
PROG Pin Voltage vs Temperature
(Constant Current Mode)
1.0100
1.0075
1.0050
1.0025
V
CC
= 5V
V
BAT
= 4V
R
PROG
= 1k
Charge Current
vs PROG Pin Voltage
180
150
120
90
60
30
0
V
CC
= 5V
R
PROG
= 1k
T
A
= 25°C
1.0000
0.9975
0.9950
0.9925
0.9900
–50
–25
50
25
TEMPERATURE (°C)
0
75
100
4054L G02
0
0.25
0.5
0.75
V
PROG
(V)
1
1.25
4054L G03
4054L G01
4054l42f
3
LTC4054L-4.2
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Pull-Up Current vs
Temperature and Supply Voltage
3.7
3.5
3.3
V
BAT
= 4.3V
V
PROG
= 0V
3.5
3.0
2.5
I
PROG
(µA)
I
PROG
(µA)
2.0
1.5
1.0
0.5
0
2.0
I
PROG
(µA)
3.1
V
CC
= 6.5V
2.9
2.7
2.5
–50 –25
V
CC
= 4.2V
50
25
75
0
TEMPERATURE (°C)
Regulated Output (Float) Voltage
vs Charge Current
4.26
V
CC
= 5V
R
PROG
= 600Ω
4.24 T
A
= 25°C
4.22
V
FLOAT
(V)
V
FLOAT
(V)
4.20
4.18
4.200
4.195
4.190
4.185
–50
V
FLOAT
(V)
4.16
4.14
0
30
60
90
120
I
BAT
(mA)
CHRG Pin I-V Curve
(Strong Pull-Down State)
25
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
20
20
I
CHRG
(mA)
I
CHRG
(µA)
15
I
CHRG
(mA)
10
5
6
0
0
1
2
4
3
V
CHRG
(V)
5
6
7
4
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
4
U W
100
4054L G04
PROG Pin Current vs PROG Pin
Voltage (Pull-Up Current)
0
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
–50
–100
–150
–200
–250
–300
–350
–400
2.1
2.2
2.3
V
PROG
(V)
4054L G05
PROG Pin Current vs PROG Pin
Voltage (Clamp Current)
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
125
2.4
2.5
2.6
2
2.5
3
4
3.5
V
PROG
(V)
4.5
5
5.5
4054L G06
Regulated Output (Float) Voltage
vs Temperature
4.215
4.210
4.205
V
CC
= 5V
R
PROG
= 1k
4.215
4.210
4.205
4.200
4.195
4.190
4.185
Regulated Output (Float) Voltage
vs Supply Voltage
R
PROG
= 1k
T
A
= 25°C
150
180
–25
0
25
50
TEMPERATURE (°C)
75
100
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
4054L G07
4054L G08
4054L G09
CHRG Pin Current vs Temperature
(Strong Pull-Down State)
V
CC
= 5V
18 V
BAT
= 4V
V
CHRG
= 1V
16
14
12
10
8
22
20
18
16
14
12
10
8
CHRG Pin I-V Curve
(Weak Pull-Down State)
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
0
1
2
4
3
V
CHRG
(V)
5
6
7
4054L G10
4054L G11
4054L G12
4054l42f
LTC4054L-4.2
TYPICAL PERFOR A CE CHARACTERISTICS
CHRG Pin Current vs Temperature
(Weak Pull-Down State)
28
V
CC
= 5V
V
BAT
= 4.3V
25 V
CHRG
= 5V
22
I
TRKL
(mA)
9
V
CC
= 5V
V
BAT
= 2.5V
6
I
TRKL
(mA)
I
CHRG
(µA)
19
16
13
10
–50
–25
0
25
50
TEMPERATURE (°C)
Trickle Charge Threshold
vs Temperature
V
CC
= 5V
2.975 R
PROG
= 1k
2.950
3.000
V
TRKL
(V)
I
BAT
(mA)
2.900
2.875
2.850
2.825
2.800
–50
80
I
BAT
(mA)
2.925
–25
50
25
TEMPERATURE (°C)
0
Charge Current
vs Ambient Temperature
180
R
PROG
= 1k
150
120
I
BAT
(mA)
4.11
4.09
R
DS(ON)
(mΩ)
V
RECHRG
(V)
ONSET OF
THERMAL
REGULATION
V
BAT
= 4V
90 V
CC
= 5V
θ
JA
= 125°C/W
60
30
R
PROG
= 15k
0
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
U W
75
4054L G13
Trickle Charge Current
vs Temperature
15
R
PROG
= 1k
12
12
15
Trickle Charge Current
vs Supply Voltage
R
PROG
= 1k
9
V
BAT
= 2.5V
T
A
= 25°C
6
3
R
PROG
= 15k
100
0
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
3
R
PROG
= 15k
0
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
4054L G14
4054L G15
Charge Current vs Battery Voltage
160
200
Charge Current vs Supply Voltage
V
BAT
= 4V
T
A
= 25°C
θ
JA
= 125°C/W
R
PROG
= 1k
120
V
CC
= 5V
R
PROG
= 1k
T
A
= 25°C
θ
JA
= 125°C/W
160
120
80
40
40
R
PROG
= 15k
0
75
100
4054L G16
2.7
3.0
3.3
3.6
3.9
V
BAT
(V)
4.2
4.5
0
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
4054L G17
4054L G18
Recharge Voltage Threshold
vs Temperature
1.8
Power FET “ON” Resistance
vs Temperature
V
CC
= 4.1V
V
BAT
= 4V
R
PROG
= 1k
V
CC
= 5V
R
PROG
= 1k
1.6
4.07
4.05
4.03
4.01
3.99
–50
1.4
1.2
1.0
–25
0
25
50
TEMPERATURE (°C)
75
100
0.8
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
4054L G19
4054L G20
4054L G21
4054l42f
5
LTC4054L-4.2
150mA Standalone Linear
Li-Ion Battery Charger in ThinSOT
DESCRIPTIO
The LTC
®
4054L is a complete, constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its small size and ability to regulate low charge currents
make the LTC4054L especially well-suited for portable
applications using low capacity rechargeable lithium-ion
coin cells. Furthermore, the LTC4054L is specifically de-
signed to work within USB power specifications.
No external sense resistor is needed, and no blocking di-
ode is required due to the internal MOSFET architecture.
Thermal feedback regulates the charge current to eliminate
thermal overdesign. The charge voltage is fixed at 4.2V, and
the charge current can be programmed externally with a
single resistor. The LTC4054L automatically terminates a
charge cycle when the charge current drops to 1/10th the
programmed value after the final float voltage is reached.
When the input supply (wall adapter or USB supply) is
removed, the LTC4054L automatically enters a low cur-
rent state, dropping the battery drain current to less than
2µA. The LTC4054L can be put into shutdown mode, re-
ducing the supply current to 25µA.
Other features include charge current monitor, undervoltage
lockout, automatic recharge and a status pin to indicate
charge termination and the presence of an input voltage.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
*U.S. Patent No. 6,522,118
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
Programmable Charge Current Range:
10mA to 150mA
No External MOSFET, Sense Resistor or Blocking
Diode Required
Complete Linear Charger in ThinSOT
TM
Package for
Single Cell/Coin Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage Operation with
Thermal Regulation* to Maximize Charge Rate
Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
from USB Port
Preset 4.2V Charge Voltage with
±1%
Accuracy
Charge Current Monitor Output for Gas Gauging*
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25µA Max Supply Current in Shutdown Mode
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available in a 6-Lead Low Profile (1mm)
SOT-23 Package
APPLICATIO S
s
s
s
s
Charger for Li-Ion Coin Cell Batteries
Portable MP3 Players, Wireless Headsets
Bluetooth Applications
Multifunction Wristwatches
TYPICAL APPLICATIO
V
IN
4.5V TO 6.5V
1µF
Complete Charge Cycle (130mAh Battery)
100
4.4
CONSTANT
CURRENT
4.3
CONSTANT
VOLTAGE
4.2
BATTERY VOLTAGE (V)
90mA Li-Ion Single Coin Cell Charger
CHARGE CURRENT (mA)
90
80
70
60
50
40
30
20
10
0
4
BAT
LTC4054L-4.2
PROG
GND
2
V
CC
3
90mA
5
1.69k
4.2V
COIN CELL
Li-Ion
BATTERY
4054l42 TA01
3.4
0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25
TIME (HOURS)
4054l42 TA01b
V
CC
= 5V
θ
JA
= 130°C/W
R
PROG
= 1.69k
T
A
= 25°C
U
U
U
4.1
4.0
3.9
3.8
3.7
3.6
3.5
4054l42f
1
LTC4054L-4.2
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
CHRG 1
GND 2
BAT 3
4 V
CC
5 PROG
Input Supply Voltage (V
CC
) ....................... –0.3V to 10V
PROG ............................................. – 0.3V to V
CC
+ 0.3V
CHRG ........................................................ –0.3V to 10V
BAT ............................................................. – 0.3V to 7V
BAT Short-Circuit Duration .......................... Continuous
BAT Pin Current ................................................. 200mA
PROG Pin Current ................................................ 1.5mA
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LTC4054LES5-4.2
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 80°C/ W TO 150°C/W
DEPENDING ON PC BOARD LAYOUT (NOTE 3)
S5 PART MARKING
LTAFA
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
q
denotes 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
Supply Voltage
Supply Current
Charge Mode (Note 4), R
PROG
= 1k
Standby Mode (Charge Terminated)
Shutdown Mode (R
PROG
Not Connected,
V
CC
< V
BAT
, or V
CC
< V
UV
)
0°C
≤
T
A
≤
85°C, I
BAT
= 40mA
R
PROG
= 15k, Current Mode
R
PROG
= 1k, Current Mode
Standby Mode, V
BAT
= 4.2V
Shutdown Mode (R
PROG
Not Connected)
Sleep Mode, V
CC
= 0V
R
PROG
= 15k, V
BAT
Rising
R
PROG
= 15k
From V
CC
Low to High
PROG Pin Rising
PROG Pin Falling
V
CC
from Low to High
V
CC
from High to Low
R
PROG
= 15k (I
BAT
= 10mA) (Note 5)
R
PROG
= 1k (I
BAT
= 150mA) (Note 5)
R
PROG
= 1k, Current Mode
V
CHRG
= 5V
I
CHRG
= 5mA
V
FLOAT
– V
RECHRG
100
q
q
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
q
q
q
q
MIN
4.25
TYP
1200
200
25
MAX
6.5
2000
500
50
4.242
10.7
157.5
–6
±2
±2
25
3
110
3.92
300
1.30
1.1
140
50
0.115
0.112
1.07
35
0.6
200
UNITS
V
µA
µA
µA
V
mA
mA
µA
µA
µA
mA
V
mV
V
mV
V
V
mV
mV
mA/mA
mA/mA
V
µA
V
mV
V
FLOAT
I
BAT
Regulated Output (Float) Voltage
BAT Pin Current
4.158
9.3
142.5
0
4.2
10
150
–2.5
±1
±1
15
2.9
80
3.8
200
1.21
1.0
100
30
0.10
0.10
1
20
0.35
150
I
TRIKL
V
TRIKL
V
TRHYS
V
UV
V
UVHYS
V
MSD
V
ASD
I
TERM
V
PROG
I
CHRG
V
CHRG
∆V
RECHRG
Trickle Charge Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
V
CC
Undervoltage Lockout Threshold Voltage
V
CC
Undervoltage Lockout Hysteresis Voltage
Manual Shutdown Threshold Voltage
V
CC
– V
BAT
Lockout Threshold Voltage
C/10 Termination Current Threshold
PROG Pin Voltage
CHRG Pin Weak Pull-Down Current
CHRG Pin Output Low Voltage
Recharge Battery Hysteresis Voltage
V
BAT
< V
TRIKL
, R
PROG
= 1k (I
BAT
= 150mA)
q
5
2.8
60
3.7
150
1.15
0.9
70
5
0.085
0.088
0.93
8
4054l42f
2
U
W
U
U
W W
W
LTC4054L-4.2
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
SYMBOL
T
LIM
R
ON
t
SS
t
RECHARGE
t
TERM
I
PROG
PARAMETER
Junction Temperature in Constant
Temperature Mode
Power FET “ON” Resistance
(Between V
CC
and BAT)
Soft-Start Time
Recharge Comparator Filter Time
Termination Comparator Filter Time
PROG Pin Pull-Up Current
I
BAT
= 0 to I
BAT
=150V/R
PROG
V
BAT
High to Low
I
BAT
Drops Below I
CHG
/10
0.75
400
1.5
CONDITIONS
MIN
TYP
120
1.5
100
2
1000
3
4.5
2500
5
MAX
UNITS
°C
Ω
µs
ms
µs
µA
ELECTRICAL CHARACTERISTICS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2:
The LTC4054LE-4.2 is guaranteed to meet performance specifica-
tions 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:
See Thermal Considerations.
Note 4:
Supply current includes PROG pin current (≈1mA) but does not
include any current delivered to the battery through the BAT pin.
Note 5:
I
TERM
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Voltage vs Supply
Voltage (Constant Current Mode)
1.0100
1.0075
1.0050
V
PROG
(V)
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
V
PROG
(V)
I
BAT
(mA)
1.0025
R
PROG
= 1k
R
PROG
= 15k
1.0000
0.9975
0.9950
0.9925
0.9900
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
U W
PROG Pin Voltage vs Temperature
(Constant Current Mode)
1.0100
1.0075
1.0050
1.0025
V
CC
= 5V
V
BAT
= 4V
R
PROG
= 1k
Charge Current
vs PROG Pin Voltage
180
150
120
90
60
30
0
V
CC
= 5V
R
PROG
= 1k
T
A
= 25°C
1.0000
0.9975
0.9950
0.9925
0.9900
–50
–25
50
25
TEMPERATURE (°C)
0
75
100
4054L G02
0
0.25
0.5
0.75
V
PROG
(V)
1
1.25
4054L G03
4054L G01
4054l42f
3
LTC4054L-4.2
TYPICAL PERFOR A CE CHARACTERISTICS
PROG Pin Pull-Up Current vs
Temperature and Supply Voltage
3.7
3.5
3.3
V
BAT
= 4.3V
V
PROG
= 0V
3.5
3.0
2.5
I
PROG
(µA)
I
PROG
(µA)
2.0
1.5
1.0
0.5
0
2.0
I
PROG
(µA)
3.1
V
CC
= 6.5V
2.9
2.7
2.5
–50 –25
V
CC
= 4.2V
50
25
75
0
TEMPERATURE (°C)
Regulated Output (Float) Voltage
vs Charge Current
4.26
V
CC
= 5V
R
PROG
= 600Ω
4.24 T
A
= 25°C
4.22
V
FLOAT
(V)
V
FLOAT
(V)
4.20
4.18
4.200
4.195
4.190
4.185
–50
V
FLOAT
(V)
4.16
4.14
0
30
60
90
120
I
BAT
(mA)
CHRG Pin I-V Curve
(Strong Pull-Down State)
25
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
20
20
I
CHRG
(mA)
I
CHRG
(µA)
15
I
CHRG
(mA)
10
5
6
0
0
1
2
4
3
V
CHRG
(V)
5
6
7
4
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
4
U W
100
4054L G04
PROG Pin Current vs PROG Pin
Voltage (Pull-Up Current)
0
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
–50
–100
–150
–200
–250
–300
–350
–400
2.1
2.2
2.3
V
PROG
(V)
4054L G05
PROG Pin Current vs PROG Pin
Voltage (Clamp Current)
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
125
2.4
2.5
2.6
2
2.5
3
4
3.5
V
PROG
(V)
4.5
5
5.5
4054L G06
Regulated Output (Float) Voltage
vs Temperature
4.215
4.210
4.205
V
CC
= 5V
R
PROG
= 1k
4.215
4.210
4.205
4.200
4.195
4.190
4.185
Regulated Output (Float) Voltage
vs Supply Voltage
R
PROG
= 1k
T
A
= 25°C
150
180
–25
0
25
50
TEMPERATURE (°C)
75
100
4
4.5
5
5.5
V
CC
(V)
6
6.5
7
4054L G07
4054L G08
4054L G09
CHRG Pin Current vs Temperature
(Strong Pull-Down State)
V
CC
= 5V
18 V
BAT
= 4V
V
CHRG
= 1V
16
14
12
10
8
22
20
18
16
14
12
10
8
CHRG Pin I-V Curve
(Weak Pull-Down State)
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
0
1
2
4
3
V
CHRG
(V)
5
6
7
4054L G10
4054L G11
4054L G12
4054l42f
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