Datasheet

LT3571
13
3571fa
TYPICAL APPLICATIONS
C1
1µF
C5
47nF
MONIN
V
REF
R
T
SHDN
CTRL
GND
MON
V
OUT
FB
V
IN
SW
LT3571
SYNC APD
V
IN
5V
R2
13.7k
R4
49.9
R3
10k
R5
20k
69V, 2mA
C5
10nF
R
SENSE
20Ω
3571 TA03a
C4
0.1µF
C3
10nF
R
T
33.2k
400kHz
L: TDK VLF4012AT-220MR51
C1: TDK X7R C1608X7R1C105KT
C2: MURATA X7R GRM21AR72A224KAC5L
C3: AVX X7R 06031C103K
C4: MURATA X7R GRM188R72A104KA35
C5: MURATA X7R GRM155R7H103K
C6: MURATA X7R GCM155R471C473K
74V
C2
0.22µF
L1
22µH
R1
1M
EXTERNAL
CONTROL BLOCK
5V to 69V APD Bias Supply with Soft-Start
ADP CURRENT (mA)
0
INPUT POWER (mW)
500
50
450
350
250
150
400
300
200
100
0
1
3571 TA03c
21.50.5
I
APD
= 1mA 2µs/DIV
3571 TA03b
2mV/DIV
APD Bias Ripple Input Power vs APD Current