LTC3577_15 Datasheet, PDF (11/54 Pages) Linear Technology – Highly Integrated 6-Channel Portable PMIC

LTC3577/LTC3577-1
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified
Input Current Limit
vs Temperature
1200
1100
1000
V_BUS = 5V
R_CLPROG = 2.1k
10x MODE
900
800
700
600
5x MODE
500
400
300
200
100
1x MODE
0
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3577 G04
Battery Current and Voltage
vs Time
600
6
CHRG
500
5
V_BAT
400
4
300
3
200
1450mAhr
CELL
100 VBUS = 5V
R_PROG = 2k
R_CLPROG = 2k
0
0
1
2
SAFETY
TIMER 2
TERMINATION
C/10
1
I_BAT
0
3
4
56
TIME (HOUR)
3577 G07
LTC3577-1 I_BAT vs V_BAT
600
R_CLPROG = 2.1k
R_PROG = 2k
500 V_BUS = 5V
10x MODE
400
300
FALLING V_BAT
200
100
RISING V_BAT
0
2.0 2.4 2.8 3.2 3.6 4.0 4.4
V_BAT (V)
3577 G10
Input R_ON vs Temperature
300
I_OUT = 400mA
280
260
240
V_BUS = 4.5V
220
V_BUS = 5V
180
V_BUS = 5.5V
160
140
120
100
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3577 G05
Battery Regulation (Float) Voltage
vs Temperature
4.24
I_BAT = 2mA
4.22
LTC3577
4.20
4.18
4.16
4.14
4.12
LTC3577-1
4.10
4.08
4.06
4.04
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3577 G08
Forward Voltage vs Ideal Diode
Current (No External FET)
0.25
V_BUS = 0V
T_A = 25°C
V_BAT = 3.2V
0.20
V_BAT = 3.6V
V_BAT = 4.2V
0.15
0.10
0.05
0
0 0.2 0.4 0.6 0.8 1.0 1.2
I_BAT (A)
3577 G11
Charge Current vs Temperature
(Thermal Regulation)
600
500
400
300
200
100 ^VBUS ^{= 5V}
10x MODE
R_PROG = 2k
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
3577 G06
LTC3577 I_BAT vs V_BAT
600
R_CLPROG = 2.1k
R_PROG = 2k
500 V_BUS = 5V
10x MODE
400
300
FALLING V_BAT
200
RISING V_BAT
100
0
2.0 2.4 2.8 3.2 3.6 4.0 4.4
V_BAT (V)
3577 G09
Forward Voltage vs Ideal Diode
Current (with Si2333DS External FET)
40
V_BAT = 3.8V
35 ^VBUS ^{= 0V}
T_A = 25°C
30
25
20
15
10
5
0
0
0.2
0.4
0.6
0.8 1.0
I_BAT (A)
3577 G12
3577fa
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