Datasheet

LTC3613
6
3613fa
TYPICAL PERFORMANCE CHARACTERISTICS
Output Regulation
vs Input Voltage
Output Regulation
vs Load Current
Output Regulation
vs Temperature
Switching Frequency
vs Input Voltage
Switching Frequency
vs Load Current
Non-Synchronized Switching
Frequency vs Temperature
Overcurrent Protection Short-Circuit Protection Overvoltage Protection
4ms/DIV
7.5A
3613 G10
V
IN
= 12V
V
OUT
= 1.5V
FIGURE 10 CIRCUIT
V
OUT
1V/DIV
LOAD-STEP
TRIGGER
I
LOAD
10A/DIV
V
OUT
DROOPS
DUE TO
REACHING CURRENT LIMIT
NOTE
200µs/DIV
3613 G11
V
IN
= 12V
V
OUT
= 1.5V
FIGURE 10 CIRCUIT
V
OUT
1V/DIV
I
LOAD
10A/DIV
SHORT-
CIRCUIT
TRIGGER
NOTE: INDUCTOR CURRENT REACHES
CURRENT LIMIT BEFORE FOLDBACK
AND DURING SHORT-CIRCUIT RECOVERY
SHORT-CIRCUIT
REGION
20µs/DIV
3613 G12
V
IN
= 12V
V
OUT
= 1.5V
FIGURE 10 CIRCUIT
NOTE: SW IS FORCED LOW
FOR EXTENDED PERIODS TO
REMOVE OVERVOLTAGE
V
OUT
200mV/DIV
I
L
10A/DIV
SW
20V/DIV
OVERVOLTAGE
TRIGGER
OVERVOLTAGE REGION
INPUT VOLTAGE (V)
0
–0.5
∆V
OUT
ERROR (%)
–0.3
–0.1
0.1
0.3
0.5
48
3613 G13
12 16 20 24
V
IN
= 12V
I
LOAD
= 5A
FIGURE 10 CIRCUIT
LOAD CURRENT (A)
0
∆V
OUT
ERROR (%)
0.3
0.1
12
3613 G14
–0.1
–0.3
–0.5
3
6
9
15
0.5
V
IN
= 12V
I
LOAD
= 4A
FIGURE 10 CIRCUIT
TEMPERATURE (°C)
–50
–0.2
NORMALIZED ∆V
OUT
(%)
–0.1
0
0.1
0.2
–25 0 25 50
3613 G15
55 100 125 150
V
IN
= 12V
I
LOAD
= 0A
V
OUT
NORMALIZED AT T
A
= 25°C
FIGURE 10 CIRCUIT
V
IN
(V)
0
–1.0
NORMALIZED Δf
(%)
–0.5
0
0.5
1.0
8
16
24
3613 G16
1.5
2.0
4
12
20
V
IN
= 12V
I
LOAD
= 5A
FIGURE 10 CIRCUIT
LOAD CURRENT (A)
0
NORMALIZED Δf
(%)
–0.1
0.1
0.3
12
3613 G17
–0.3
–0.5
3
6
9
15
0.5
V
IN
= 12V
I
LOAD
= 4A
FIGURE 10 CIRCUIT
TEMPERATURE (°C)
–50
–2.0
NORMALIZED Δf (%)
–1.5
–1.0
–0.5
0
050
100
150
3613 G18
0.5
1.0
–25 25
75
125
V
IN
= 12V
I
LOAD
= 0A
FREQUENCY NORMALIZED AT T
A
= 25°C
FIGURE 10 CIRCUIT
T
A
= 25°C unless otherwise noted