LTC3830-1 Linear Technology, LTC3830-1 Datasheet - Page 5

• Manufacturer Part Number: LTC3830-1
• Description: High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
100
99
98
97
96
95
93
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
94
92
91
15
14
13
12
11
10
9
8
7
6
5
–50
–50
–50
Maximum G1 Duty Cycle
vs Temperature
Output Current Limit Threshold
vs Temperature
Undervoltage Lockout Threshold
Voltage vs Temperature
V
REFER TO FIGURE 3
REFER TO FIGURE 12 AND NOTE 10 OF
THE ELECTRICAL CHARACTERISTICS
R
FB
IMAX
–25
–25
–25
= 0V
= 20k
0
0
TEMPERATURE ( C)
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25
50
50
50
75
75
75
W
100
100
100
3830 G11
3830 G17
3830 G14
U
125
125
125
–10
–11
–12
–13
–14
–15
–16
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
20
18
16
14
12
10
–8
–9
8
6
4
– 50
– 50
–50
I
vs Temperature
Soft-Start Source Current
vs Temperature
V
vs Temperature
MAX
FREQSET FLOATING
CC
– 25
– 25
–25
Operating Supply Current
Sink Current
0
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25
50
50
50
75
75
75
100
100
100
3830 G12
3830 G18
3830 G15
125
125
125
LTC3830/LTC3830-1
1.75
1.50
1.00
0.75
0.50
2.00
1.25
0.25
3.5
3.0
2.5
2.0
1.5
1.0
0.5
90
80
70
60
50
40
20
30
10
0
0
0
–150
0
0
Output Overcurrent Protection
Soft-Start Sink Current
vs (V
PV
vs Oscillator Frequency
T
REFER TO FIGURE 12
R
T
T
A
A
IMAX
A
WITH 1000pF,
CC
= 25 C
= 25 C
PV
= 25 C
G1 AND G2
2
–125
CC1,2
IFB
OSCILLATOR FREQUENCY (kHz)
Supply Current
= 20k
100
LOADED
– V
OUTPUT CURRENT (A)
= 5V
4
–100
V
IMAX
IFB
G1 AND G2 LOADED
200
6
– V
)
–75
WITH 6800pF,
PV
IMAX
CC1,2
8
300
(mV)
–50
= 12V
WITH 6800pF,
10
PV
G1 AND G2
LOADED
CC1,2
sn3830 3830fs
400
–25
12
3830 G19
= 5V
3830 G13
3830 G16
5
500
14
0