LTC3714 Linear, LTC3714 Datasheet - Page 5

• Manufacturer Part Number: LTC3714
• Description: Wide Operating Range / Step-Down Controller with Internal Op Amp
• Manufacturer: Linear

TYPICAL PERFOR A CE CHARACTERISTICS
50mV/DIV
–0.1
–0.2
–0.3
–0.4
5A/DIV
95
90
85
80
75
70
V
0
OUT
0
0
I
Efficiency vs Load Current
Load Regulation
L
Transient Response
LOAD STEP 0A TO 10A
V
V
FCB = 0V
FIGURE 1 CIRCUIT
IN
OUT
3
= 15V
V
FREQUENCY = 300kHz
FIGURE 1 CIRCUIT
= 1.5V
2
OUT
V
6
IN
V
= 1.35V
LOAD CURRENT (A)
LOAD CURRENT (A)
= 15V
V
IN
IN
= 8.5V
9
= 24V
4
20 s/DIV
12
FIGURE 1 CIRCUIT
6
15
W
18
8
NO AVP
3714 G03
3714 G06
21
3714 G01
U
10
50mV/DIV
5A/DIV
100
2.0
2.5
1.5
1.0
V
90
80
70
60
0.5
OUT
0
I
L
0
Efficiency vs Input Voltage
0
I
TH
FIGURE 1 CIRCUIT
Transient Response
(Discontinuous Mode)
LOAD STEP 1A TO 10A
V
V
FCB = INTV
FIGURE 1 CIRCUIT
CONTINUOUS
IN
OUT
Voltage vs Load Current
= 15V
5
= 1.5V
DISCONTINUOUS
MODE
MODE
CC
INPUT VOLTAGE (V)
LOAD CURRENT (A)
10
5
20 s/DIV
15
I
OUT
20
10
= 10A
I
I
OUT
OUT
25
= 1A
= 23A
3714 G04
3714 G07
3714 G02
30
15
500mV/DIV
RUN/SS
2V/DIV
5A/DIV
–100
–200
V
300
280
260
240
220
200
300
200
100
OUT
I
0
L
5
0
Current Sense Threshold
vs I
Start-Up
Frequency vs Input Voltage
V
V
R
FCB = 0V
FIGURE 1 CIRCUIT
IN
OUT
LOAD
= 15V
TH
= 1.25V
0.5
= 0.125
Voltage
10
INPUT VOLTAGE (V)
1.0
I
TH
I
I
VOLTAGE (V)
OUT
50ms/DIV
OUT
LTC3714
15
1.5
= 10A
= 0A
V
RNG
2.0
=
20
2.5
1.4V
1V
2V
0.7V
0.5V
3714 G05
3714 G08
5
3714 G19
3714f
3.0
25