LTC3620 Datasheet, PDF (4/16 Pages) Linear Technology – Ultralow Power 15mA Synchronous Step-Down Switching Regulator

LTC3620
TYPICAL PERFORMANCE CHARACTERISTICS
Switching Frequency
vs Load Current, FMIN/MODE
1000
200kHz, EXTERNAL
FMIN/MODE = 0V
FMIN/MODE = V_IN
100
10
0.01
T_A = 25°C
V_IN = 3.6V
V_OUT = 1.1V
0.1
1
LOAD CURRENT (mA)
10 20
3620 G01
LTC3620-1 Feedback Voltage
vs Temperature
1.125
V_IN = 3.6V
1.120 FMIN/MODE = 0V
1.115
1.110
1.105
1.100
1.095
1.090
1.085
1.080
–50
0
50
TEMPERATURE (°C)
100 130
3620 G04
LOBATB Threshold
vs Temperature
3.05
3.04
V_OUT = 1.1V
FMIN/MODE = 0V
3.03
3.02
3.01
3.00
2.99
2.98
2.97
2.96
2.95
–50
0
50
TEMPERATURE (°C)
100 130
3620 G07
4
Load Regulation
0.5
V_IN = 3.6V
V_OUT = 1.1V
0.3
FMIN/MODE = 0V
T_A = 25°C
0.1
–0.1
–0.3
–0.5
0
5
10
LOAD CURRENT (mA)
15
3620 G02
LTC3620 Feedback Voltage
vs Temperature
620
V_IN = 3.6V
615 ^VOUT ^{= 1.1V}
FMIN/MODE = 0V
610
605
600
595
590
585
580
–50
0
50
TEMPERATURE (°C)
100 130
3620 G03
Quiescent Current vs Temperature
30
28
V_OUT = 1.1V
FMIN/MODE = V_IN
26
24
22
V_IN = 5V
20
V_IN = 3.6V
18
16
14
12
10
–50
0
50
100 130
TEMPERATURE (°C)
3620 G05
UVLO Threshold vs Temperature
2.85
2.84
V_OUT = 1.1V
FMIN/MODE = 0V
2.83
2.82
2.81
2.80
2.79
2.78
2.77
2.76
2.75
–50
0
50
100 130
TEMPERATURE (°C)
3620 G06
Peak Inductor Current
vs Temperature
40
V_OUT = 1.1V
L = 22μH
39
V_IN = 5.5V
38
37
Switching Waveforms at 250μA
Load, FMIN/MODE = 0V
V_OUT (AC)
20mV/DIV
V_SW
2V/DIV
36
35
34
–50
V_IN = 3.6V
I_L
25mA/DIV
0
50
TEMPERATURE (°C)
100 130
3620 G08
V_OUT = 1.1V
V_IN = 3.6V
T_A = 25°C
4μs/DIV
3620 G09
3620f