LTC3577-4_15 Datasheet, PDF (14/52 Pages) Linear Technology – Highly Integrated Portable Product PMIC

LTC3577-3/LTC3577-4
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified
OVP Reconnection Waveform
V_BUS
5V/DIV
OVGATE
5V/DIV
OVP
INPUT
VOLTAGE
10V TO 5V
STEP 5V/DIV
500μs/DIV
357734 G34
OVSENS Quiescent Current
vs Temperature
37
V_OVSENS = 5V
35
33
31
29
27
–40
–15 10
35
60
85
TEMPERATURE (°C)
357734 G35
Rising Overvoltage Threshold
vs Temperature
6.280
6.275
6.270
6.265
6.260
6.255
–40
–15 10
35
60
85
TEMPERATURE (°C)
357734 G36
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)
357734 G37
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)
357734 G38
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)
357734 G39
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)
357734 G40
14
LED Driver Efficiency 4 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)
357734 G41
DAC Code vs LED Current
70
60
50
40
30
20
0dB = 20μA
10
60dB = 20mA
R_{LED_FS} = 20kΩ
0
0 10 20 30 40 50 60 70
DAC CODE
357734 G42
357734fb