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