LTC3577 Datasheet, PDF (14/52 Pages) Linear Technology – Highly Integrated 6-Channel Portable PMIC

LTC3577/LTC3577-1
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified
OVSENS Quiescent Current
vs Temperature
37
V_OVSENS = 5V
35
Rising Overvoltage Threshold
vs Temperature
6.280
6.275
33
6.270
31
6.265
29
6.260
27
–40
–15 10
35
60
85
TEMPERATURE (°C)
3577 G34
Input and Battery Current
vs Load Current
600 _{RPROG = 2k}
500 ^{RCLPROG = 2k}
I_IN
400
I_LOAD
300
200
I_BAT
(CHARGING)
100
0
I_BAT
WALL = 0V
(DISCHARGING)
–100
0 100 200 300 400 500 600
I_LOAD (mA)
3577 G37
6.255
–40
–15 10
35
60
85
TEMPERATURE (°C)
3577 G35
LED Driver Efficiency 10 LEDs
90
85
80
75
70
65
60
3V
3.6V
55
4.2V
4.8V
5.5V
50
0 2 4 6 8 10 12 14 16 18 20
I_LED (mA)
3577 G38
LED Driver Efficiency 6 LEDs
90
85
80
75
70
65
60
3V
3.6V
55
4.2V
4.8V
5.5V
50
0 2 4 6 8 10 12 14 16 18 20
I_LED (mA)
3577 G40
LED Driver Efficiency 4 LEDs
90
85
80
75
70
65
60
3V
3.6V
55
4.2V
4.8V
5.5V
50
0 2 4 6 8 10 12 14 16 18 20
I_LED (mA)
3577 G41
14
OVGATE vs OVSENS
12 _{OVSENS CONNECTED}
TO INPUT THROUGH
10 6.2k RESISTOR
8
6
4
2
0
0
2
4
6
8
INPUT VOLTAGE (V)
3577 G36
LED Driver Efficiency 8 LEDs
90
85
80
75
70
65
60
3V
3.6V
55
4.2V
4.8V
50
5.5V
0 2 4 6 8 10 12 14 16 18 20
I_LED (mA)
35773 G39
LED Boost Current Limit
vs Temperature
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3577 G42
3577f