Datasheet

LT3482
4
3482fa
Oscillator Frequency vs
Temperature
Switch Current Limit
vs Duty Cycle
Switch Current Limit vs
Temperature
Current Monitor Output vs MONIN APD Current Monitor Accuracy
APD Current Monitor Accuracy
vs Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
900
1000
1200
25 75
3482 G01
800
700
–25 0
50 100 125
600
500
1100
FREQUENCY (kHz)
f
SET
= 2V
f
SET
= 0V
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT (mA)
150
200
250
60
100
3482 G02
100
50
0
20 40 80
300
350
400
TEMPERATURE (°C)
–50
SWITCH CURRENT LIMIT (mA)
340
25
3482 G03
280
240
–25 0 50
220
200
360
320
300
260
75 100 125
MONIN (V)
10
18
I
MON
(µA)
19
20
21
22
20 30 40 50
3482 G04
60 70 80 90
I
APD
= 100µA
I
APD
(A)
1.0E-08 1.0E-06 1.0E-04 1.0E-02
1.0E-02
1.0E-03
1.0E-04
1.0E-05
1.0E-06
1.0E-07
1.0E-08
1.0E-09
3482 G05
I
MON
(A)
MONIN = 90V
TEMPERATURE (°C)
–50
ERROR (%)
–2
0
2
25 75
3482 G06
–4
–6
–25 0
50 100 125
–8
–10
I
APD
= 2.5mA
I
APD
= 10µA
I
APD
= 250nA
MONIN = 90V
Current Monitor Voltage Drop
vs Reference Current
REFERENCE CURRENT (A)
1.00E-07 1.00E-05 1.00E-03
5
6
7
4
3
2
1
0
MONIN – APD (V)
Switch Saturation Voltage (V
CESAT
)
SWITCH CURRENT (mA)
0
V
CESAT
(mV)
200
250
300
150 250
3482 G08
150
100
50 100
200 300 350
50
0
FB Pin Voltage vs Temperature
TEMPERATURE (°C)
–50
FB PIN VOLTAGE (V)
1.24
1.25
25 75
3482 G09
1.23
–25 0
50 100 125
1.22
V
IN
= 16V
V
IN
= 3V
(T
A
= 25°C unless otherwise specifi ed)