Datasheet

LTC3609
5
3609fb
LOAD CURRENT (A)
0.01
EFFICIENCY (%)
70
80
10
3609 G04
60
0
50
40
30
20
10
0.1 1
100
90
V
IN
= 12V
FREQUENCY = 550kHz
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.5V
V
OUT
= 1.2V
V
OUT
= 1V
INPUT VOLTAGE (V)
5
80
EFFICIENCY (%)
85
90
95
100
8 14 1711 29
3609 G05
3220 2623
I
LOAD
= 1A
I
LOAD
= 6A
FCB = 5V
FIGURE 6 CIRCUIT
5 8 14 1711 29 3220 2623
INPUT VOLTAGE (V)
FREQUENCY (kHz)
500
3609 G06
450
400
650
600
550
FCB = 0V
FIGURE 6 CIRCUIT
I
LOAD
= 1A
I
LOAD
= 6A
LOAD CURRENT (A)
∆V
OUT
(%)
3609 G08
–0.80
–0.60
–0.40
–0.20
0.60
0.40
0.20
0
0.80
FIGURE 6 CIRCUIT
0 2 4 6 8
LOAD CURRENT (A)
0
I
TH
VOLTAGE (V)
1.0
1.5
3609 G09
0.5
0
42 6 8
2.5
2.0
CONTINUOUS
MODE
DISCONTINUOUS
MODE
FIGURE 6 CIRCUIT
LOAD CURRENT (A)
0
0
FREQUENCY (kHz)
100
200
300
400
500
600
700
2 4 6
3609 G07
8
CONTINUOUS MODE
DISCONTINUOUS MODE
Efficiency vs Load Current Efficiency vs Input Voltage Frequency vs Input Voltage
Frequency
vs Load Current Load Regulation I
TH
Voltage vs Load Current
Typical perForMance characTerisTics
I
TH
VOLTAGE (V)
0
–10
LOAD CURRENT (A)
–5
0
5
10
15
0.5 1.0 1.5 2.0
3609 G10
2.5
V
RNG
= 1.2V
V
RNG
= 1V
V
RNG
= 0.7V
I
ON
CURRENT (µA)
1
10
ON-TIME (ns)
100
1000
10000
10 100
3609 G11
V
VON
= 0V
V
ON
VOLTAGE (V)
0
ON-TIME (ns)
400
600
3609 G12
200
0
1 2 3
1000
I
ON
= 30µA
800
Load Current vs I
TH
Voltage at
Different V
RNG
On-Time vs I
ON
Current On-Time vs V
ON
Voltage