LTC3577_15 Datasheet, PDF (14/54 Pages) Linear Technology – Highly Integrated 6-Channel Portable PMIC

LTC3577/LTC3577-1
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified
OVP Connection Waveform
OVP Protection Waveform
OVP Reconnection Waveform
V_BUS
5V/DIV
OVGATE
5V/DIV
OVP
INPUT
VOLTAGE
0V TO 5V
STEP 5V/DIV
500μs/DIV
V_BUS
5V/DIV
OVGATE
5V/DIV
OVP
INPUT
VOLTAGE
5V TO 10V
STEP 5V/DIV
3577 G31
500μs/DIV
V_BUS
5V/DIV
OVGATE
5V/DIV
OVP
INPUT
VOLTAGE
10V TO 5V
3577 G32 _{STEP 5V/DIV}
500μs/DIV
3577 G33
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
50
5.5V
0 2 4 6 8 10 12 14 16 18 20
I_LED (mA)
3577 G38
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
5.5V
50
0 2 4 6 8 10 12 14 16 18 20
I_LED (mA)
35773 G39
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