Datasheet
LTC3833
6
3833f
Output Regulation
vs Input Voltage
Output Regulation
vs Load Current
Output Regulation
vs Temperature
Non-Synchronized Switching
Frequency vs Input Voltage
Non-Synchronized Switching
Frequency vs Load Current
Non-Synchronized Switching
Frequency vs Temperature
Overcurrent Protection Short-Circuit Protection Overvoltage Protection
10ms/DIV
7.5A
7.5A
3833 G10
V
IN
= 12V
V
OUT
= 1.5V
FIGURE 10 CIRCUIT
V
OUT
200mV/DIV
I
L
10A/DIV
I
LOAD
10A/DIV
CURRENT LIMIT (25A)
V
OUT
DROOPS DUE TO
REACHING CURRENT LIMIT
1ms/DIV
3833 G11
V
IN
= 12V
V
OUT
= 1.5V
FIGURE 10 CIRCUIT
V
OUT
1V/DIV
I
L
10A/DIV
SHORT-
CIRCUIT
TRIGGER
INDUCTOR CURRENT FOLDBACK
DURING SHORT-CIRCUIT
I
LOAD
12A
I
LOAD
12A
NOTE 7: INDUCTOR CURRENT REACHES
CURRENT LIMIT BEFORE FOLDBACK
AND DURING SHORT-CIRCUIT RECOVERY
SHORT-CIRCUIT
REGION
NOTE 7
20µs/DIV
3833 G12
V
IN
= 12V
V
OUT
= 1.5V
FIGURE 10 CIRCUIT
V
OUT
200mV/DIV
I
L
20A/DIV
BG
5V/DIV
OVERVOLTAGE
TRIGGER
OVERVOLTAGE REGION
NOTE 8: BG IS FORCED HIGH FOR EXTENDED
PERIODS TO REMOVE OVERVOLTAGE
NOTE 8
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise noted
V
IN
(V)
0
–0.2
NORMALIZED ∆V
OUT
(%)
–0.1
0
0.1
0.2
5 10 15 20
3833 G13
25 30 35 40
V
OUT
= 0.6V
I
LOAD
= 5A
V
OUT
NORMALIZED AT V
IN
= 15V
I
LOAD
(A)
0
NORMALIZED ∆V
OUT
(%)
0
0.1
8
3833 G14
–0.1
–0.2
2
4
6
10
0.2
V
IN
= 15V
V
OUT
= 0.6V
V
OUT
NORMALIZED AT I
LOAD
= 4A
TEMPERATURE (°C)
–50
–0.2
NORMALIZED ∆V
OUT
(%)
–0.1
0
0.1
0.2
–25 0 25 50
3833 G15
55 100 125 150
V
IN
= 15V
V
OUT
= 0.6V
I
LOAD
= 0A
V
OUT
NORMALIZED AT T
A
= 25°C
V
IN
(V)
0
–1.0
NORMALIZED ∆f (%)
–0.5
0
0.5
1.0
10 20
30
40
3833 G16
1.5
2.0
5 15
25
35
V
OUT
= 0.6V
I
LOAD
= 5A
f = 500kHz
FREQUENCY NORMALIZED AT V
IN
= 15V
I
LOAD
(A)
0
NORMALIZED ∆f (%)
0
0.1
8
3833 G17
–0.1
–0.2
2
4
6
10
0.2
V
IN
= 15V
V
OUT
= 0.6A
f = 500kHz
FREQUENCY NORMALIZED AT I
LOAD
= 4A
TEMPERATURE (°C)
–50
–2.0
NORMALIZED ∆f (%)
–1.5
–1.0
–0.5
0
0 50
100
150
3833 G18
0.5
1.0
–25 25
75
125
V
IN
= 15V, V
OUT
= 0.6V
I
LOAD
= 0A, f = 500kHz
FREQUENCY NORMALIZED AT T
A
= 25°C