Datasheet
LTC3611
5
3611fd
typicAl perForMAnce chArActeristics
Frequency vs Load Current
Load Current vs I
TH
Voltage
and V
RNG
On-Time vs I
ON
Current On-Time vs V
ON
Voltage
Efficiency vs Load Current Efficiency vs Input Voltage Frequency vs Input Voltage
I
TH
VOLTAGE (V)
0
LOAD CURRENT (A)
5
10
15
25
20
2
3611 G10
0
–5
–10
0.5
1
1.5
32.5
0.5V
0.7V
V
RNG
= 1V
V
ON
VOLTAGE (V)
0
ON-TIME (ns)
400
600
3611 G12
200
0
1 2 3
1000
I
ON
= 30µA
800
I
ON
CURRENT (µA)
1
10
ON-TIME (ns)
100
1000
10000
10 100
3611 G11
V
VON
= 0V
LOAD CURRENT (A)
0
I
TH
VOLTAGE (V)
1.0
1.5
3611 G09
0.5
0
5 10 15
2.5
2.0
CONTINUOUS
MODE
DISCONTINUOUS
MODE
FIGURE 6 CIRCUIT
LOAD CURRENT (A)
0
∆V
OUT
(%)
8
3611 G08
–0.80
–0.60
–0.40
–0.20
0.60
0.40
0.20
0
2 4 6
10
0.80
FIGURE 6 CIRCUIT
LOAD CURRENT (A)
0
0
FREQUENCY (kHz)
50
100
150
200
250
300
350
400
450
500
550
600
650
2 4 6 8
3611 G07
10
CONTINUOUS MODE
DISCONTINUOUS MODE
INPUT VOLTAGE (V)
5
FREQUENCY (kHz)
480
520
25 30 35
3611 G06
440
400
10 15 20
640
600
560
I
LOAD
= 10A
FCB = 0V
FIGURE 6 CIRCUIT
I
LOAD
= 0A
INPUT VOLTAGE (V)
5
EFFICIENCY (%)
90
95
100
25 30
3611 G05
85
80
10
15
20
35
FCB = 5V
FIGURE 6 CIRCUIT
I
LOAD
= 10A
I
LOAD
= 1A
LOAD CURRENT (A)
0.01
50
EFFICIENCY (%)
70
60
100
90
80
0.1 1 10
3611 G04
DISCONTINUOUS
CONTINUOUS
V
IN
= 12V
V
OUT
= 2.5V
EXTV
CC
= 5V
FIGURE 6 CIRCUIT
Load Regulation I
TH
Voltage vs Load Current