LTC3834 Linear Technology, LTC3834 Datasheet - Page 6

• Manufacturer Part Number: LTC3834
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

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