Datasheet

LTC3608
5
3608fc
LOAD CURRENT (A)
0
ΔV
OUT
(%)
8
3608 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
I
TH
VOLTAGE (V)
1.0
1.5
3608 G09
0.5
0
5 10
2.5
2.0
CONTINUOUS
MODE
DISCONTINUOUS
MODE
LOAD CURRENT (A)
0
0
FREQUENCY (kHz)
100
200
300
400
500
600
700
2 4 6 8
3608 G07
10
CONTINUOUS MODE
DISCONTINUOUS MODE
typical perForMance characteristics
Frequency vs Load Current Load Regulation I
TH
Voltage vs Load Current
I
TH
VOLTAGE (V)
0
–10
LOAD CURRENT (A)
–5
0
5
20
15
10
25
0.5 1.0 1.5 2.0
3608 G10
2.5 3.0
V
RNG
=
1V
0.7V
0.5V
I
ON
CURRENT (µA)
1
10
ON-TIME (ns)
100
1000
10000
10 100
3608 G11
V
VON
= 0V
V
ON
VOLTAGE (V)
0
ON-TIME (ns)
400
600
3608 G12
200
0
1 2 3
1000
I
ON
= 30µA
800
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
LOAD CURRENT (A)
0.01
0
EFFICIENCY (%)
10
20
30
40
50
60
70
80
90
100
0.1 1
3608 G04
10
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
OUT
= 1V
V
IN
= 12V
FREQ = 550kHz
INPUT VOLTAGE (V)
5
80
EFFICIENCY (%)
85
90
95
100
10 15
3608 G05
20
I
LOAD
= 10A
I
LOAD
= 1A
FCB = 5V
FIGURE 6 CIRCUIT
INPUT VOLTAGE (V)
5
400
FREQUENCY (kHz)
450
500
550
600
650
10 15
3608 G06
20
I
LOAD
= 10A
I
LOAD
= 1A
FCB = 0V
FIGURE 6 CIRCUIT