lt3571 Linear Technology Corporation, lt3571 Datasheet - Page 14

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

TYPICAL APPLICATIONS
LT3571
14
350
300
250
200
150
100
50
0
0
Input Power vs APD Current
V
5V
IN
0.5
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
APD CURRENT (mA)
TEMPERATURE
COMPENSATION BLOCK
C1
1μF
R9
20k
5V to 50V APD Bias Power Supply with Temperature Compensation
Q2
1
R7
49.9k
R8
36.5k
C6
0.1μF
1.5
R5
30.1k
Q1
3571 TA09
2
R6
100k
OFF ON
R
33.2k
400kHz
T
Q1, Q2 = PHILIPS PEMT1
SYNC
SHDN
CTRL
R
GND
V
REF
T
MON
V
IN
C5
10nF
LT3571
15μH
L1
R3
10k
SW
MONIN
APD
V
OUT
R4
49.9Ω
FB
60
58
56
54
52
50
48
46
44
42
0
–50
55V
50V
Temperature Response
–25
C3
10nF
C4
0.1μF
0
TEMPERATURE (°C)
R1
1M
R2
15k
R
50Ω
25
SENSE
50
3571 TA08
C2
0.22μF
75
100
3571 TA10
125
3571f