Datasheet

LTC3714
5
3714f
Typical perForMance characTerisTics
Efficiency vs Load Current
Efficiency vs Input Voltage
Frequency vs Input Voltage
Load Regulation
I
TH
Voltage vs Load Current
Current Sense Threshold
vs I
TH
Voltage
Transient Response
(Discontinuous Mode)Transient Response Start-Up
20µs/DIV
3714 G01
LOAD STEP 0A TO 10A
V
IN
= 15V
V
OUT
= 1.5V
FCB = 0V
FIGURE 1 CIRCUIT
V
OUT
50mV/DIV
I
L
5A/DIV
20µs/DIV
3714 G02
LOAD STEP 0A TO 10A
V
IN
= 15V
V
OUT
= 1.5V
FCB = INTV
CC
FIGURE 1 CIRCUIT
V
OUT
50mV/DIV
I
L
5A/DIV
LOAD CURRENT (A)
0
EFFICIENCY (%)
3714 G04
3 6 9 12 15 18 21
95
90
85
80
75
70
V
IN
= 8.5V
V
OUT
= 1.35V
FREQUENCY = 300kHz
FIGURE 1 CIRCUIT
V
IN
= 15V
V
IN
= 24V
INPUT VOLTAGE (V)
0
EFFICIENCY (%)
100
90
80
70
60
5 10 15 20
3714 G05
25 30
I
OUT
= 10A
I
OUT
= 1A
I
OUT
= 23A
INPUT VOLTAGE (V)
5
FREQUENCY (kHz)
240
260
25
3714 G06
220
200
10
15
20
300
280
I
OUT
= 10A
FCB = 0V
FIGURE 1 CIRCUIT
I
OUT
= 0A
LOAD CURRENT (A)
0
∆V
OUT
(%)
–0.2
–0.1
8
3714 G07
–0.3
–0.4
2
4
6
10
0
NO AVP
FIGURE 1 CIRCUIT
LOAD CURRENT (A)
0
I
TH
VOLTAGE (V)
1.0
1.5
3714 G08
0.5
0
5
10
15
2.5
2.0
CONTINUOUS
MODE
DISCONTINUOUS
MODE
FIGURE 1 CIRCUIT
I
TH
VOLTAGE (V)
0
–200
CURRENT SENSE THRESHOLD (mV)
–100
0
100
200
300
0.5
1.0 1.5 2.0
3714 G09
2.5 3.0
V
RNG
=
1V
0.7V
0.5V
1.4V
2V
50ms/DIV
3714 G03
V
IN
= 15V
V
OUT
= 1.25V
R
LOAD
= 0.125Ω
V
OUT
500mV/DIV
RUN/SS
2V/DIV
I
L
5A/DIV