Datasheet

LT3598
5
3598fb
TYPICAL PERFORMANCE CHARACTERISTICS
SHDN Pin Turn-On Threshold SHDN Pin Current Quiescent Current
Reference Voltage Oscillator Frequency Switch Current Limit
Switch V
CESAT
Soft-Start Pin Current Feedback Pin Voltage
TEMPERATURE (°C)
–50
SHDN THRESHOLD (V)
1.4
1.3
050
–25
25 75 100 125
1.2
1.5
3598 G01
V
SHDN
(V)
0
0
SHDN PIN CURRENT (μA)
5
15
20
25
50
35
10
20
25
10
40
45
30
5
15
30
35
3598 G02
125°C
–50°C
25°C
TEMPERATURE (°C)
–50
QUIESCENT CURRENT (mA)
5
4
050
–25
25 75 100 125
3
2
6
3598 G03
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
1.230
1.235
1.225
1.220
050
–25
25 75 100 125
1.215
1.240
3598 G04
V
IN
= 40V
V
IN
= 30V
V
IN
= 5V
TEMPERATURE (°C)
–50
OSCILLATOR FREQUENCY (MHz)
2.0
2.5
1.5
1.0
050
–25
25 75 100 125
0.5
0
3.0
3598 G05
2.5MHz
1MHz
200kHz
TEMPERATURE (°C)
–50
SWITCH CURRENT (A)
2.0
2.4
1.6
1.2
050
–25
25 75 100 125
0.8
0.4
2.8
3598 G06
TEMPERATURE (°C)
–50
I
SS
(μA)
12.5
10.0
050
–25
25 75 100 125
7.5
5.0
15.0
3598 G08
TEMPERATURE (°C)
–50
FEEDBACK VOLTAGE (V)
1.23
1.22
050
–25
25 75 100 125
1.21
1.20
1.24
3598 G09
V
C
= 1.5V
V
C
= 1V
SWITCH CURRENT (A)
0
V
CESAT
(V)
0.30
0.35
0.40
0.25
0.20
0.25 0.750.50 1.00 1.25 1.5O
0.05
0
0.15
0.10
3598 G07
125°C
–50°C
25°C