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LTC4054LES5-4.2#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC4054L-4.2
4
4054l42fa
Typical perForMance characTerisTics
Regulated Output (Float) Voltage
vs Charge Current
Regulated Output (Float) Voltage
vs Temperature
Regulated Output (Float) Voltage
vs Supply Voltage
CHRG Pin I-V Curve
(Strong Pull-Down State)
CHRG Pin Current vs Temperature
(Strong Pull-Down State)
CHRG Pin I-V Curve
(Weak Pull-Down State)
PROG Pin Pull-Up Current vs
Temperature and Supply Voltage
PROG Pin Current vs PROG Pin
Voltage (Pull-Up Current)
PROG Pin Current vs PROG Pin
Voltage (Clamp Current)
TEMPERATURE (°C)
–50
I
PROG
(µA)
3.3
3.5
25 75
4054L G04
3.1
2.9
–25 0
50 100 125
2.7
2.5
V
BAT
= 4.3V
V
PROG
= 0V
V
CC
= 6.5V
V
CC
= 4.2V
V
PROG
(V)
2.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.3 2.5
4054L G05
2.1 2.2
2.4 2.6
I
PROG
(µA)
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
V
PROG
(V)
2
I
PROG
(µA)
–50
3.5
4054L G06
–200
–300
2.5 3 4
–350
–400
0
–100
–150
–250
4.5 5 5.5
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
I
BAT
(mA)
0
4.14
V
FLOAT
(V)
4.16
4.18
4.20
4.22
4.26
30
60 90 120
4054L G07
150 180
4.24
V
CC
= 5V
R
PROG
= 600Ω
T
A
= 25°C
TEMPERATURE (°C)
–50
4.185
V
FLOAT
(V)
4.190
4.195
4.200
4.205
4.215
–25
0 25 50
4054L G08
75 100
4.210
V
CC
= 5V
R
PROG
= 1k
V
CC
(V)
4
4.185
V
FLOAT
(V)
4.190
4.195
4.200
4.205
4.215
4.5
5 5.5 6
4054L G09
6.5 7
4.210
R
PROG
= 1k
T
A
= 25°C
V
CHRG
(V)
0 1
0
I
CHRG
(mA)
10
25
2
4
5
4054L G10
5
20
15
3
6
7
V
CC
= 5V
V
BAT
= 4V
T
A
= 25°C
TEMPERATURE (°C)
–50
I
CHRG
(mA)
18
25
4054L G11
12
8
–25 0 50
6
4
20
16
14
10
75 100 125
V
CC
= 5V
V
BAT
= 4V
V
CHRG
= 1V
V
CHRG
(V)
0
16
18
22
3 5
4054L G12
14
12
1 2
4 6 7
10
8
20
I
CHRG
(µA)
V
CC
= 5V
V
BAT
= 4.3V
T
A
= 25°C
LTC4054L-4.2
5
4054l42fa
Typical perForMance characTerisTics
Trickle Charge Threshold
vs Temperature Charge Current vs Battery Voltage Charge Current vs Supply Voltage
Charge Current
vs Ambient Temperature
Recharge Voltage Threshold
vs Temperature
Power FET “ON” Resistance
vs Temperature
CHRG Pin Current vs Temperature
(Weak Pull-Down State)
Trickle Charge Current
vs Temperature
Trickle Charge Current
vs Supply Voltage
TEMPERATURE (°C)
–50
10
I
CHRG
(µA)
13
16
19
22
28
–25
0 25 50
4054L G13
75 100
25
V
CC
= 5V
V
BAT
= 4.3V
V
CHRG
= 5V
TEMPERATURE (°C)
–50
0
I
TRKL
(mA)
3
6
9
12
15
–25
0 25 50
4054L G14
75 100
R
PROG
= 1k
R
PROG
= 15k
V
CC
= 5V
V
BAT
= 2.5V
V
CC
(V)
4
0
I
TRKL
(mA)
3
6
9
12
15
4.5
5 5.5 6
4054L G15
6.5 7
R
PROG
= 1k
R
PROG
= 15k
V
BAT
= 2.5V
T
A
= 25°C
TEMPERATURE (°C)
–50
V
TRKL
(V)
25
75
4054L G16
–25 0 50
2.950
2.925
2.900
2.875
2.850
2.825
2.800
2.975
3.000
100
V
CC
= 5V
R
PROG
= 1k
V
BAT
(V)
2.7
0
I
BAT
(mA)
40
80
120
160
3.0 3.3 3.6 3.9
4054L G17
4.2 4.5
V
CC
= 5V
R
PROG
= 1k
T
A
= 25°C
θ
JA
= 125°C/W
V
CC
(V)
4
0
I
BAT
(mA)
40
80
120
160
200
4.5
5 5.5 6
4054L G18
6.5 7
R
PROG
= 1k
R
PROG
= 15k
V
BAT
= 4V
T
A
= 25°C
θ
JA
= 125°C/W
TEMPERATURE (°C)
–50
I
BAT
(mA)
120
150
180
25 75
4054L G19
90
60
–25 0
50 100 125
30
0
R
PROG
= 1k
R
PROG
= 15k
V
BAT
= 4V
V
CC
= 5V
θ
JA
= 125°C/W
ONSET OF
THERMAL
REGULATION
TEMPERATURE (°C)
–50
3.99
V
RECHRG
(V)
4.01
4.03
4.05
4.07
4.11
–25
0 25 50
4054L G20
75 100
4.09
V
CC
= 5V
R
PROG
= 1k
TEMPERATURE (°C)
–50 –25
0.8
R
DS(ON)
(mΩ)
1.2
1.8
0
50
75
4054L G21
1.0
1.6
1.4
25
100
125
V
CC
= 4.1V
V
BAT
= 4V
R
PROG
= 1k
LTC4054L-4.2
6
4054l42fa
pin FuncTions
CHRG (Pin 1): Open-Drain Charge Status Output. When
the battery is charging, the CHRG pin is pulled low by an
internal N-channel MOSFET. When the charge cycle is
completed, a weak pull-down of approximately 20µA is
connected to the CHRG pin, indicating an “AC present”
condition. When the LTC4054L detects an undervoltage
lockout condition, CHRG is forced high impedance.
GND (Pin 2): Ground.
BAT (Pin 3): Charge Current Output. Provides charge cur-
rent to the battery and regulates the final float voltage to
4.2V. An internal precision resistor divider from this pin sets
this float voltage and is disconnected in shutdown mode.
V
CC
(Pin 4): Positive Input Supply Voltage. Provides
power to the charger. V
CC
can range from 4.25V to 6.5V
and should be bypassed with at least a 1µF capacitor.
When V
CC
drops to within 30mV of the BAT pin voltage,
the LTC4054L enters shutdown mode, dropping I
BAT
to
less than 2µA.
PROG (Pin 5): Charge Current Program, Charge Current
Monitor and Shutdown Pin. The charge current is pro-
grammed by connecting a 1% resistor, R
PROG
, to ground.
When charging in constant-current mode, this pin servos
to 1V. In all modes, the voltage on this pin can be used to
measure the charge current using the following formula:
I
BAT
= (V
PROG
/R
PROG
) • 150
The PROG pin is also used to shut down the charger.
Disconnecting the program resistor from ground allows
a 3µA current to pull the PROG pin high. When it reaches
the 1.21V shutdown threshold voltage, the charger enters
shutdown mode, charging stops and the input supply
current drops to 25µA. This pin is also clamped to ap-
proximately 2.4V. Driving this pin to voltages beyond
the clamp voltage will draw currents as high as 1.5mA.
Reconnecting R
PROG
to ground will return the charger to
normal operation.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC4054LES5-4.2#TRMPBF

Mfr. #:
Buy LTC4054LES5-4.2#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Monlithic Li-Ion Charger - low current
Lifecycle:
New from this manufacturer.
Delivery:
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