LTC3261
TYPICAL PERFORMANCE CHARACTERISTICS
(TA = 25°C, CFLY = 1μF, CIN = COUT = 10μF unless otherwise noted)
Oscillator Frequency
vs Supply Voltage
Oscillator Frequency vs RT
Shutdown Current vs Temperature
600
500
400
300
200
100
0
600
500
400
300
200
100
0
25
20
15
10
5
V
V
V
= 32V
= 12V
= 5V
IN
IN
IN
RT = GND
RT = 200kΩ
0
0
5
10
15
20
25
30
35
1
10
100
RT (kΩ)
1000
10000
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
3261 G01
3261 G02
3261 G03
Quiescent Current
vs Supply Voltage
(Constant Frequency Mode)
Quiescent Current vs Temperature
(Burst Mode Operation)
Quiescent Current vs Temperature
(Constant Frequency Mode)
140
120
100
80
14
12
10
8
9
8
7
6
5
4
3
2
1
0
f
f
f
= 500kHz
= 200kHz
= 50kHz
V
= 12V
RT = GND
OSC
OSC
OSC
IN
f
f
f
= 500kHz
= 200kHz
= 50kHz
OSC
OSC
OSC
V
= 32V
= 12V
= 5V
IN
V
IN
60
6
V
IN
40
4
20
2
0
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
0
5
10
15
20
25
30
35
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
3261 G04
3261 G05
3261 G06
Effective Open-Loop Resistance
vs Temperature
VOUT Short-Circuit Current
vs Supply Voltage
VOUT Short Circuit Current
vs Temperature
60
55
50
45
40
35
30
25
20
250
200
150
100
50
200
180
160
140
120
100
V
V
V
= 32V
= 25V
= 12V
f
= 500kHz
V
= 12V
IN
IN
IN
IN
OSC
RT = GND
f
= 500kHz
= 200kHz
20
OSC
f
OSC
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
0
5
10
15
25
30
35
–50 –25
0
25
50
75 100 125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
3261 G07
3261 G08
3261 G8b
3261f
4
Linear Systems [ Linear Systems ]
