Datasheet

LTC3834
6
3834fb
Maximum Current Sense Voltage
vs I
TH
Voltage Cycle
SENSE Pins Total Input
Bias Current
Maximum Current Sense
Threshold vs Duty
Foldback Current Limit Quiescent Current vs Temperature
SENSE Pins Total Input
Bias Current vs I
TH
TRACK/SS Pull-Up Current
vs Temperature
Shutdown (RUN) Threshold
vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
I
TH
PIN VOLTAGE (V)
40
6O
100
0.4 0.8
3834 G13
20
0
0 0.2
0.6 1.0 1.2 1.4
–20
–40
80
CURRENT SENSE THRESHOLD (mV)
10% DUTY CYCLE
FORCED CONTINUOUS
Burst Mode OPERATION
(RISING)
Burst Mode OPERATION
(FALLING)
PULSE SKIPPING
V
SENSE
COMMON MODE VOLTAGE (V)
–120
–150
–180
–210
–240
30
0
–30
–60
–90
60
6789
3834 G14
–270
32104
510
–300
INPUT BIAS CURRENT (μA)
DUTY CYCLE (%)
80
120
30 50
3834 G15
60
40
10020
40 60 10070 80 90
20
0
100
MAXIMUM CURRENT SENSE VOLTAGE (mV)
FEEDBACK VOLTAGE (V)
0
80
120
0.3 0.5
3834 G16
60
40
0.1 0.2
0.4 0.6 0.90.7 0.8
20
0
100
MAXIMUM CURRENT SENSE VOLTAGE (mV)
TEMPERATURE (°C)
30
32
36
38
40
45
3834 G17
28
26
0–15–30–45 15
30 60 75 90
24
22
34
QUIESCENT CURRENT (μA)
I
TH
VOLTAGE (V)
2
3
4
1.2
3834 G18
1
0.60.40.20 0.8
1.0 1.4
0
INPUT CURRENT (μA)
TEMPERATURE (°C)
1.05
1.10
1.20
1.25
1.30
45
3834 G19
1.00
0.95
0–15–30–45 15
30 60 75 90
0.90
1.15
TRACK/SS CURRENT (μA)
TEMPERATURE (°C)
0.80
0.75
0.70
0.65
0.60
0.55
0.50
1.00
0.95
0.90
0.85
45 60 75 90
3834 G20
0–15–30–45 15
30
RUN PIN VOLTAGE (V)