lt1618ems-trpbf Linear Technology Corporation, lt1618ems-trpbf Datasheet - Page 13

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

TYPICAL APPLICATIO S
200mA/DIV
1.8V TO 5V
12V Boost Converter Start-Up with Input Current Limit
5V/DIV
V
OUT
I
LI
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN EMK316BJ475
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CR43-100
V
4.7µF
IN
12V Boost Converter with 500mA Input Current Limit
C1
(V
I
L1
IN
= 1.8V, I
0.1Ω
50µs/DIV
3
8
9
LOAD
4
ISP
V
SHDN
I
ADJ
ISN
IN
2
= 40mA)
LT1618
10µH
GND
5
U
L1
[phone]
[phone]
[phone]
[phone]
10
SW
V
FB
C
7
2k
10nF
1
1618 TA07
D1
R1
909k
R2
107k
1618 • TA06a
C2
4.7µF
V
12V
200mA/DIV
OUT
12V Boost Converter Start-Up without Input Current Limit
5V/DIV
V
OUT
I
LI
(V
90
85
80
75
70
65
60
IN
0
= 1.8V, I
20
50µs/DIV
40
LOAD
L0AD CURRENT (mA)
Efficiency
V
IN
60
= 40mA)
= 3.3V
V
80
IN
= 5V
100
1618 TA08
120 140
LT1618
1618 TA06b
sn1618 1618fas
160
13