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LTC3832-1_15 Datasheet, PDF (5/24 Pages) Linear Technology – High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation | |||
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC3832/LTC3832-1
Maximum G1 Duty Cycle
vs Temperature
100
VFB = 0V
99 REFER TO FIGURE 3
98
97
96
95
94
93
92
91
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3832 G10
Output Current Limit Threshold
vs Temperature
20
REFER TO FIGURE 12 AND NOTE 10 OF
19 THE ELECTRICAL CHARACTERISTICS
18
17
16
15
14
13
12
11
10
â50 â25
0 25 50 75 100 125
TEMPERATURE (°C)
3832 G13
Undervoltage Lockout Threshold
Voltage vs Temperature
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
â50 â25
0 25 50 75 100 125
TEMPERATURE (°C)
3832 G16
IMAX Sink Current
vs Temperature
20
18
16
14
12
10
8
6
4
â 50 â 25
0 25 50 75
TEMPERATURE (°C)
100 125
3832 G11
Soft-Start Source Current
vs Temperature
â8
â9
â10
â11
â12
â13
â14
â15
â16
â 50 â 25
0 25 50 75
TEMPERATURE (°C)
100 125
3830 G14
VCC Operating Supply Current
vs Temperature
1.6
FREQSET FLOATING
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3832 G17
Output Overcurrent Protection
3.0
TA = 25°C
REFER TO FIGURE 12
2.5
2.0
1.5
1.0
0.5
0
0 2 4 6 8 10 12 14 16 18 20
OUTPUT CURRENT (A)
3832 G12
Soft-Start Sink Current
vs (VIFB â VIMAX)
2.00
TA = 25°C
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
â150 â125 â100 â75 â50
VIFB â VIMAX (mV)
â25 0
3832 G15
PVCC Supply Current
vs Oscillator Frequency
90
TA = 25°C
80
70
60
G1 AND G2 LOADED
WITH 6800pF,
PVCC1,2 = 12V
50
G1 AND G2
40
LOADED
WITH 1000pF,
30
PVCC1,2 = 5V
G1 AND G2
LOADED
WITH 6800pF,
PVCC1,2 = 5V
20
10
0
0
100 200 300 400 500
OSCILLATOR FREQUENCY (kHz)
3832 G18
sn3832 3832fs
5
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