Datasheet

LTC3866
7
3866fb
TYPICAL PERFORMANCE CHARACTERISTICS
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
Shutdown Current
vs Input Voltage
TK/SS Pull-Up Current
vs Temperature
Maximum Current Sense
Threshold Voltage vs Feedback
Voltage (Current Foldback)
T
A
= 25°C, unless otherwise noted.
FEEDBACK VOLTAGE (V)
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
15
20
25
0.3
0.5
3866 G14
10
5
0
0.1 0.2 0.4
30
35
40
0.6
I
LIM
= INTV
CC
I
LIM
= 3/4 INTV
CC
I
LIM
= 1/2 INTV
CC
I
LIM
= 1/4 INTV
CC
I
LIM
= 0V
TEMPERATURE (°C)
–50
TK/SS (µA)
1.0
1.2
1.4
150
3866 G15
0.8
0.6
0
0
50
100
–25
25
75
125
0.2
0.4
1.8
1.6
TEMPERATURE (°C)
–50
RUN THRESHOLD (V)
1.20
1.30
150
3866 G16
1.10
1.00
0
50
100
–25
25
75
ON
OFF
125
1.40
1.15
1.25
1.05
1.35
TEMPERATURE (°C)
–50
598.5
REGULATED FEEDBACK VOLTAGE (mV)
599.0
599.5
600.0
600.5
0 50
100
150
3866 G17
601.0
601.5
–25 25
75
125
TEMPERATURE (°C)
–50
FREQUENCY (kHz)
500
550
150
3866 G18
450
400
0
50
100
–25
25
75
125
600
475
525
425
575
V
FREQ
= 1.2V
INPUT VOLTAGE (V)
0
FREQUENCY (kHz)
500
600
700
40
3866 G19
400
300
0
10
20
30
5
15
25
35
200
100
900
800
V
FREQ
= 2.5V
V
FREQ
= 1.2V
V
FREQ
= 0V
TEMPERATURE (°C)
–50
2.5
UVLO THRESHOLD (V)
2.7
3.1
3.3
3.5
4.5
3.9
0
50
3866 G20
2.9
4.1
4.3
3.7
100
–25 25
75
125
150
RISE
FALL
INPUT VOLTAGE (V)
0
0
SHUTDOWN CURRENT (µA)
10
30
40
50
100
70
10
20
25
3866 G21
20
80
90
60
5 15
30
35
40