Datasheet

LT3571
4
3571fa
TYPICAL PERFORMANCE CHARACTERISTICS
Schottky Forward Drop Oscillator Frequency vs R
T
Oscillator Frequency
vs Temperature
FB Pin Voltage vs Temperature V
REF
Voltage vs Temperature V
OUT
– V
MONIN
Threshold vs V
OUT
Switch Current Limit
vs Duty Cycle
Switch Current Limit
vs Temperature
Switch Saturation Voltage
(V
CESAT
)
T
A
= 25°C, unless otherwise specifi ed.
DUTY CYCLE (%)
0
CURRENT LIMIT (mA)
40
80
20
60
100
3571 G01
250
300
350
400
450
500
TEMPERATURE (°C)
–50
CURRENT LIMIT (mA)
0
50
75
–25
25
100
125
3571 G02
250
300
350
400
450
500
I
SW
(mA)
V
CESAT
(mV)
3571 G03
0
100
200
300
400
500
0 350
100 200
50
150 250 300 400
SCHOTTKY FORWARD CURRENT (mA)
SCHOTTKY FORWARD DROP (mV)
3571 G04
0 350
100 200
50
150 250 300 400
800
850
900
750
700
650
600
950
TEMPERATURE (°C)
–50
OSCILLATOR FREQUENCY (kHz)
0
50
75
–25
25
100
125
3571 G06
900
950
1000
1050
1100
R
T
= 12.1k
TEMPERATURE (°C)
–50
FB PIN THRESHOLD (V)
0
50
75
–25
25
100
125
3571 G07
0.98
0.99
1.00
1.01
1.02
TEMPERATURE (°C)
–50
V
REF
(mV)
0
50
75
–25
25
100
125
3571 G08
1.210
1.215
1.220
1.225
1.230
1.235
V
OUT
(V)
10
V
OUT
– V
MONIN
THRESHOLD (mV)
30
40
50
20
60
8070
3571 G09
195
197
199
201
203
205
R
T
(k)
0
100
OSCILLATOR FREQUENCY (kHz)
1000
10000
10 6020 30 40
3571 G05
50