Datasheet

LTC3609
6
3609fb
Typical perForMance characTerisTics
INPUT VOLTAGE (V)
4
MAXIMUM VALLEY CURRENT (A)
10
3609 G17
0
2
4
6
8
12 20 28
36
RUN/SS VOLTAGE (V)
1.65
0
MAXIMUM VALLEY CURRENT LIMIT (A)
3
6
9
12
15
1.90 2.15 2.65 2.90 3.15 3.402.40
3609 G15
FIGURE 6 CIRCUIT
TEMPERATURE (°C)
–50
ON-TIME (ns)
200
250
300
25 75
3609 G13
150
100
–25 0 50 100 125
50
0
I
ION
= 30µA
V
VON
= 0V
V
FB
(V)
0
MAXIMUM VALLEY CURRENT LIMIT (A)
0.1 0.2 0.3 0.4 0.5 0.6
3609 G18
10
0
2
4
6
8
V
RNG
VOLTAGE (V)
0.5
0
MAXIMUM VALLEY CURRENT LIMIT (A)
3
6
9
12
15
0.6 0.7 0.8
3609 G14
0.9 1.21.11.0
FIGURE 6 CIRCUIT
TEMPERATURE (°C)
–50 –25
MAXIMUM VALLEY CURRENT LIMIT (A)
0 50 75
3609 G16
25 100 125
0
3
6
9
12
15
On-Time vs Temperature
Maximum Valley Current Limit
in
Foldback
Maximum Valley Current Limit
vs V
RNG
Voltage
Maximum Valley Current Limit
vs RUN/SS Voltage
Maximum Valley Current Limit
vs Temperature
Maximum Valley Current vs Input
Voltage
TEMPERATURE (°C)
–50 –25
1.0
g
m
(mS)
1.4
2.0
0
50
75
3609 G20
1.2
1.8
1.6
25
100
125
INPUT VOLTAGE (V)
0
INPUT CURRENT (µA)
SHUTDOWN CURRENT (µA)
800
1000
1400
1200
15 25
3609 G21
600
400
5 10 20 30
200
0
30
25
15
5
40
35
20
10
0
EXTV
CC
OPEN
EXTV
CC
= 5V
SHUTDOWN
Error Amplifier g
m
vs Temperature
Input and Shutdown Currents
vs Input Voltage
TEMPERATURE (°C)
–50
0.58
FEEDBACK REFERENCE VOLTAGE (V)
0.59
0.60
0.61
0.62
–25 0 25 50
3609 G19
75 100 125
Feedback Reference Voltage
vs Temperature