lt3571 Linear Technology Corporation, lt3571 Datasheet - Page 4

• Manufacturer Part Number: lt3571
• Description: 75v Dc/dc Converter For Apd Bias
• Manufacturer: Linear Technology Corporation

LT3571
TYPICAL PERFORMANCE CHARACTERISTICS
4
1.02
0.98
1.01
1.00
0.99
600
500
300
250
950
900
800
750
700
650
450
400
350
850
–50
0
0
Switch Current Limit
vs Duty Cycle
Schottky Forward Drop
FB Pin Voltage vs Temperature
SCHOTTKY FORWARD CURRENT (mA)
50
–25
20
100
0
TEMPERATURE (°C)
DUTY CYCLE (%)
150
40
25
200
50
60
250 300
75
80
100
350
3571 G01
3571 G04
3571 G07
100
125
400
10000
1.235
1.230
1.225
1.220
1.215
1.210
1000
500
300
250
450
400
350
100
–50
–50
Switch Current Limit
vs Temperature
0
Oscillator Frequency vs R
V
REF
–25
–25
10
Voltage vs Temperature
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
20
25
25
R
T
30
(kΩ)
50
50
40
75
75
T
50
100
100
T
3571 G02
3571 G08
3571 G05
A
= 25°C, unless otherwise specifi ed.
125
125
60
1100
1050
1000
500
100
900
205
197
195
400
300
200
950
203
201
199
0
–50
10
0
Switch Saturation Voltage
(V
Oscillator Frequency
vs Temperature
V
OUT
CESAT
50
–25
20
– V
)
100
MONIN
30
0
TEMPERATURE (°C)
150
25
40
I
V
SW
OUT
Threshold vs V
200
(mA)
(V)
50
50
250 300
75
60
R
T
= 12.1k
100
350
70
3571 G03
3571 G06
3571 G09
OUT
3571f
125
400
80