LTC3558_15 Datasheet, PDF (6/32 Pages) Linear Technology – Linear USB Battery Charger with Buck and Buck-Boost Regulators

LTC3558
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise noted.
Suspend State Supply and BAT
Currents vs Temperature
10
9
I_VCC
8
7
6
5
V_CC = 5V
BAT = 4.2V
4 ^{SUSP = 5V}
EN1 = EN2 = 0V
3
2
I_BAT
1
0
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
3558 G01
Battery Regulation (Float)
Voltage vs Temperature
4.24
V_CC = 5V
4.23
4.22
4.21
4.20
4.19
4.18
4.17
4.16
–55 –35
–15 5 25 45
TEMPERATURE (°C)
65 85
3558 G02
Battery Regulation (Float) Voltage
vs Battery Charge Current,
Constant-Voltage Charging
4.205
4.200
4.195
4.190
4.185
4.180
4.175
4.170
4.165 _{VCC = 5V}
4.160 HPWR = 5V
4.155
R_PROG = 845Ω
EN1 = EN2 = 0V
4.150
0 100 200 300 400 500 600 700 800 900 1000
I_BAT (mA)
3558 G03
Battery Charge Current
vs Supply Voltage
500
495
V_CC = 5V
HPWR = 5V
490 R_PROG = 1.74k
485 ^{EN1 = EN2 = 0V}
480
475
470
465
460
455
450
445
440
4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
V_CC (V)
3558 G04
Battery Charge Current
vs Battery Voltage
500
V_CC = 5V
450 _{RPROG = 1.74k}
400
HPWR = 5V
350
300
250
200
150
100
HPWR = 0V
50
0
2
2.5
3
3.5
4
4.5
V_BAT (V)
3558 G05
Battery Charge Current vs Ambient
Temperature in Thermal Regulation
500
450
400
350
300
250
200
150
100
V_CC = 5V
HPWR = 5V
50 ^RPROG ^{= 1.74k}
EN1 = EN2 = 0
0
–55 –35 –15 5
25 45 65 85 105 125
TEMPERATURE (°C)
3558 G06
Battery Charger Undervoltage
Lockout Threshold vs Temperature
4.2
BAT = 3.5V
4.1
RISING
4.0
3.9
FALLING
3.8
3.7
3.6
Battery Drain Current in Undervoltage
Lockout vs Temperature
3.0
EN1 = EN2 = 0V
2.5
BAT = 4.2V
2.0
BAT = 3.6V
1.5
1.0
0.5
PROG Voltage
vs Battery Charge Current
1.2
V_CC = 5V
HPWR = 5V
1.0 R_PROG = 1.74k
EN1 = EN2 = 0V
0.8
0.6
0.4
0.2
3.5
–55 –35
–15 5 25 45
TEMPERATURE (°C)
65 85
3558 G07
0
–55 –35
–15 5 25 45
TEMPERATURE (°C)
65 85
3558 G08
0
0 50 100 150 200 250 300 350 400 450 500
I_BAT (mA)
3558 G09
3558f
6