Datasheet

LT3571
14
3571fa
TYPICAL APPLICATIONS
C1
1µF
MONIN
V
REF
R
T
SHDN
CTRL
GND
SYNC
V
OUT
FB
V
IN
SW
LT3571
MON APD
OFF ON
V
IN
5V
R2
15k
R4
49.9
50V
R
T
33.2k
400kHz
R
SENSE
50
3571 TA04a
C4
0.1µF
C3
10nF
R3
10k
C5
10nF
Q1
L1: TDK VLF4012AT – 150MR63
C1: TDK X7R C1608X7R1C105KT
C2: MURATA X7R GRM21AR72A224KAC5L
C3: AVX X7R 06031C103K
C4: MURATA X7R GRM188R72A104KA35
C5: MURATA X7R GRM155R71H103K
C6: MURATA X7R GRM155R71A104KA01D
55V
C2
0.22µF
L1
15µH
R1
1M
R7
49.9k
R5
30.1k
R6
100k
R9
20k
C6
0.1µF
R8
36.5k
Q2
TEMPERATURE
COMPENSATION BLOCK
Q1, Q2 = PHILIPS PEMT1
5V to 50V APD Bias Power Supply with Temperature Compensation
APD CURRENT (mA)
0
INPUT POWER (mW)
350
50
300
250
150
100
200
0
1 1.5
3571 TA04b
20.5
TEMPERATURE (°C)
–50
V
APD
(V)
60
42
58
54
50
46
56
52
48
44
0
7525
3571 TA04c
125500 100–25
Input Power vs APD Current Temperature Response