Datasheet

LT1618
9
sn1618 1618fas
TYPICAL APPLICATIO S
U
LOAD CURRENT (mA)
0
EFFICIENCY (%)
80
75
70
65
60
50 100 150 200
1618 TA02b
250 300
4.5W Direct Broadcast Satellite (DBS) Power Supply with Short-Circuit Protection
Efficiency
LHCP
RHCP
0V
3.3V
SHDN
I
ADJ
V
C
V
IN
SW
ISN
ISP
FB
LT1618
R1
100k
R2
10k
R5
24.9k
V
IN
12V
C1
4.7µF
C
C
33nF
C3
3.3µF
C4
3.3µF
1618 TA02a
D1
L1
33µH
L3
2.2µH
L2
33µH
3
2
1
9
8
7
GND
5104
C1: TAIYO YUDEN EMK316BJ475 [phone]
C2: TAIYO YUDEN TMK316BJ105 [phone]
C3, C4: TAIYO YUDEN TMK325BJ335 [phone]
D1: ON SEMICONDUCTOR MBRM140 [phone]
L1, L2: SUMIDA CR54-330 [phone]
L3: SUMIDA CR43-2R2 [phone]
0.068Ω
R
C
2k
C2
1µF
Q1
MMBT3904
Q1
FMMT717
ZETEX
D2
MURS110
13.5V/18.5V
22kHz
NETWORK
TUNING
R3
10k
R4
1k
ADD 5V