Datasheet

LT3482
10
3482fa
C1
1µF
C2
0.1µF
R1
100Ω
APD Input Load for Current Monitor
Step Response Measurement
R4
10k
MONINV
IN
f
SET
SHDN
CTRL
GND
V
OUT2
V
OUT1
FB
SW PUMP
LT3482
MON APD
OFF ON
V
IN
3.3V
R3
16.5k
R2
1M
70V
AT 2mA
3482 TA03a
C4
0.47µF
C5
0.47µF
C1: MURATA X7R GRM21BR71C105KA01B
C2: AVX 06035C104KAT2A
C3, C6: AVX 08051C104KAT2A
C4, C5: MURATA X7R GRM31MR71H474KA01B
L1: COILCRAFT ME3220-682ML OR EQUIVALENT
C6
0.1µF
C3
0.1µF
L1
6.8µH
2
APD
10k
0V
5V
NODE A
2k
0mA
2mA
TYPICAL APPLICATIO S
U
C1
1µF
C2
0.1µF
R1
1M
MONINV
IN
f
SET
SHDN
CTRL
GND
V
OUT2
V
OUT1
FB
SW PUMP
LT3482
MON APD
OFF ON
V
IN
5V
R2
14k
85V
AT 2.5mA
3482 TA02a
C4
0.47µF
C5
0.47µF
C3
0.1µF
C1: MURATA X7R GRM21BR71C105KA01B
C2: AVX 06035C104KAT2A
C3, C6: AVX 08051C104KAT2A
C4, C5: MURATA X7R GRM31MR71H474KA01B
C7: MURATA GRM2167U1H103JA01B
L1: COILCRAFT ME3220-103KL OR EQUIVALENT
R3
10k
C7
10nF
C6
0.1µF
L1
10µH
5V to 85V APD Bias Power Supply Effi ciency
I
MONIN
(mA)
0
EFFICIENCY (%)
40
50
60
1.5 2.5
3482 TA02b
30
20
0.5 1
2 3 3.5
10
0
3.3V to 70V APD Bias Power Supply with Fast Current Monitor Response Effi ciency
I
MONIN
(mA)
0
0
EFFICIENCY (%)
10
20
30
40
50
60
0.5 1 1.5 2
3482 TA03b
2.5
V
MON
2V/DIV
V
NODE A
20V/DIV
REF GND
REF GND
500ns/DIV
3482 TA03c
Current Monitor Step Response