lt1618ems-trpbf Linear Technology Corporation, lt1618ems-trpbf Datasheet - Page 9

• Manufacturer Part Number: lt1618ems-trpbf
• Description: Constant-current/constant-voltage 1.4mhz Step-up Dc/dc Converter
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIO S
12V
4.7µF
V
IN
C1
C1: TAIYO YUDEN EMK316BJ475
C2: TAIYO YUDEN TMK316BJ105
C3, C4: TAIYO YUDEN TMK325BJ335
D1: ON SEMICONDUCTOR MBRM140
L1, L2: SUMIDA CR54-330
L3: SUMIDA CR43-2R2
0.068Ω
8
9
3
4.5W Direct Broadcast Satellite (DBS) Power Supply with Short-Circuit Protection
ISP
V
SHDN
I
ADJ
ISN
IN
4
2
LT1618
33µH
GND
L1
5
SW
U
V
FB
C
7
10
R
2k
C
C
33nF
1
1µF
C2
C
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
80
75
70
65
60
L2
33µH
D1
0
RHCP
0V
ADD 5V
50
LHCP
3.3V
LOAD CURRENT (mA)
100
Efficiency
150
R5
24.9k
200
R1
100k
R2
10k
250
1618 TA02b
300
C3
3.3µF
2.2µH
L3
MMBT3904
C4
3.3µF
Q1
R3
10k
R4
1k
Q1
FMMT717
ZETEX
22kHz
NETWORK
TUNING
D2
MURS110
LT1618
13.5V/18.5V
1618 TA02a
sn1618 1618fas
9