Datasheet

LTC3853
7
3853fa
TYPICAL PERFORMANCE CHARACTERISTICS
TK/SS Pull-Up Current
vs Temperature
Shutdown (RUN) Threshold
vs Temperature
Regulated Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature
Undervoltage Lockout Threshold
(INTV
CC
) vs Temperature
Oscillator Frequency
vs Input Voltage
TEMPERATURE (°C)
–50 –25
1.25
TK/SS CURRENT (µA)
1.45
1.75
0
50
75
3853 G17
1.35
1.65
1.55
25
100
125
TEMPERATURE (°C)
–50
1.0
RUN PIN VOLTAGE (V)
1.1
1.2
1.3
1.4
–25 0 25 50
ON
3853 G18
OFF
75 100 125
TEMPERATURE (°C)
–50
806
804
802
800
798
796
794
25 75
3853 G19
–25 0
50 100
REGULATED FEEDBACK VOLTAGE (mV)
TEMPERATURE (°C)
–50
600
700
900
25 75
3853 G20
500
400
–25 0
50 100 125
300
200
800
FREQUENCY (kHz)
V
FREQ
= INTV
CC
V
FREQ
= 1.2V
V
FREQ
= 0V
TEMPERATURE (°C)
–50
INTV
CC
VOLTAGE (V)
3.75
4.00
4.25
25 75 150
3853 G21
3.50
3.25
3.00
–25 0
50
100 125
RISING
FALLING
INPUT VOLTAGE (V)
5
FREQUENCY (kHz)
400
450
25
3853 G22
350
300
10
15
20
500
Shutdown Current
vs Input Voltage
Shutdown Current
vs Temperature
Quiescent Current
vs Temperature Without EXTV
CC
INPUT VOLTAGE (V)
5
INPUT CURRENT (µA)
40
50
25
3853 G23
30
20
10
15
20
60
TEMPERATURE (°C)
–50 –25
20
SHUTDOWN CURRENT (µA)
40
70
0
50
75
3853 G24
30
60
50
25
100
125
V
IN
= 12V
TEMPERATURE (˚C)
–50
QUIESCENT CURRENT (mA)
5
6
25 75
3853 G25
4
–25 0
50 100 125
3