LTC3834 Datasheet, PDF (6/28 Pages) Linear Technology – 30μA IQ Synchronous Step-Down Controller

LTC3834
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise noted.
Maximum Current Sense Voltage
vs I_TH Voltage Cycle
100
FORCED CONTINUOUS
80
Burst Mode OPERATION
(RISING)
Burst Mode OPERATION
6O
(FALLING)
PULSE SKIPPING
40
20
0
–20
–40
0
10% DUTY CYCLE
0.2 0.4 0.6 0.8 1.0 1.2 1.4
I_TH PIN VOLTAGE (V)
3834 G13
SENSE Pins Total Input
Bias Current
60
30
0
–30
–60
–90
–120
–150
–180
–210
–240
–270
–300
0 1 2 3 4 5 6 7 8 9 10
V_SENSE COMMON MODE VOLTAGE (V)
3834 G14
Maximum Current Sense
Threshold vs Duty
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
3834 G15
Foldback Current Limit
120
100
80
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
FEEDBACK VOLTAGE (V)
3834 G16
Quiescent Current vs Temperature
40
38
36
34
32
30
28
26
24
22
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3834 G17
SENSE Pins Total Input
Bias Current vs I_TH
4
3
2
1
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
I_TH VOLTAGE (V)
3834 G18
TRACK/SS Pull-Up Current
vs Temperature
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3834 G19
Shutdown (RUN) Threshold
vs Temperature
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3834 G20
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