LTC3801 Datasheet, PDF (3/12 Pages) Linear Technology – Micropower Constant Frequency Step-Down DC/DC Controllers in ThinSOT

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3801/LTC3801B
Input DC Supply Current (Normal)
vs Input Voltage
225
T_A = 25°C
V_ITH/RUN = 1.3V
215
205
195
185
175
2 3 4 5 6 7 8 9 10
V_IN (V)
3801 G01
Undervoltage Lockout Threshold
vs Temperature
2.2
2.0
V_IN RISING
1.8
V_IN FALLING
1.6
1.4
1.2
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
3801 G04
Regulated Feedback Voltage
vs Input Voltage
812
T_A = 25°C
808
804
800
796
792
788
2 3 4 5 6 7 8 9 10
V_IN (V)
3801 G07
Input DC Supply Current (SLEEP)
vs Input Voltage (LTC3801 Only)
20
T_A = 25°C
18
16
14
12
10
2 3 4 5 6 7 8 9 10
V_IN (V)
3801 G02
Shutdown Threshold
vs Temperature
800
V_IN = 4.2V
700
600
500
400
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
3801 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
3801 G08
Input DC Supply Current
(Shutdown) vs Input Voltage
15
T_A = 25°C
V_ITH/RUN = 0V
12
LTC3801B
9
LTC3801
6
3
0
2 3 4 5 6 7 8 9 10
V_IN (V)
3801 G03
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
3801 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)
3801 G09
3801f
3