LTC3559-1_15 Datasheet, PDF (5/24 Pages) Linear Technology – Linear USB Battery Charger with Dual Buck Regulators

LTC3559/LTC3559-1
TYPICAL PERFORMANCE CHARACTERISTICS
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)
3559 G04
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
3.5
–55 –35
–15 5 25 45
TEMPERATURE (°C)
65 85
3559 G07
Recharge Threshold
vs Temperature
115
V_CC = 5V
111
107
103
99
95
91
87
83
79
75
–55 –35 –15 5 25 45
TEMPERATURE (°C)
65 85
3559 G10
Battery Charge Current
vs Battery Voltage (LTC3559)
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
V_BAT (V)
Battery Drain Current in
Undervoltage Lockout
vs Temperature
3.0
EN1 = EN2 = 0V
4
4.5
3559 G05
2.5
BAT = 4.2
(LTC3559)
2.0
BAT = 3.6
1.5
1.0
0.5
0
–55 –35
–15 5 25 45
TEMPERATURE (°C)
65 85
3559 G08
Battery Charger FET
On-Resistance vs Temperature
700
V_CC = 4V
650 ^{IBAT = 200mA}
EN1 = EN2 = 0V
600
550
500
450
400
350
300
–55 –35 –15 5 25 45
TEMPERATURE (°C)
65 85
3559 G11
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)
3559 G06
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
0
0 50 100 150 200 250 300 350 400 450 500
I_BAT (mA)
3559 G09
SUSP/HPWR Pin Rising
Thresholds vs Temperature
1.2
V_CC = 5V
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
–55 –35
–15 5 25 45
TEMPERATURE (°C)
65 85
3559 G12
3559fb
5