LTC3772_15 Datasheet, PDF (4/20 Pages) Linear Technology – Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller

LTC3772
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current (Shutdown)
vs Temperature
14
12
10
8
6
4
2
0
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
3772 G04
Regulated Feedback Voltage
vs Input Voltage
0.812
0.808
0.804
0.800
0.796
0.792
0.788
2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
3772 G07
I_TH/RUN Start-Up Current
vs Temperature
1.5
I_TH/RUN = 0V
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
3772 FG10
Shutdown Threshold
vs Temperature
800
700
V_IN = 4.2V
600
500
400
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
3772 G05
Oscillator Frequency
vs Temperature
600
V_IN = 4.2V
590
580
570
560
550
540
530
520
510
500
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
3772 G08
I_TH/RUN Start-Up Current
vs Input Voltage
2.1
I_TH/RUN = 0V
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
0
2
4
6
8
10
INPUT VOLTAGE (V)
3772 G11
4
Regulated Feedback Voltage
vs Temperature
812
V_IN = 4.2V
808
804
800
796
792
788
–50 –30
–10 10 30 50
TEMPERATURE (°C)
80 90
3772 G06
Oscillator Frequency
vs Input Voltage
560
T_A = 25°C
555
550
545
540
2 3 4 5 6 7 8 9 10
V_IN (V)
3772 G09
Undervoltage Lockout Thresholds
vs Temperature
2.5
2.4
2.3
2.2
2.1
RISING
2.0
1.9
FALLING
1.8
1.7
1.6
1.5
–60 –40 –20 0 20 40 60 80 100
TEMPERATURE (°C)
3772 G12
3772f