LT1618 LINER [Linear Technology], LT1618 Datasheet - Page 10

• Manufacturer Part Number: LT1618
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: LINER [Linear Technology]

LT1618
10
TYPICAL APPLICATIONS
10kHz TO 50kHz
2.7V TO 5V
BRIGHTNESS
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK316BJ105
D1: ON SEMICONDUCTOR MBR0530
L1: SUMIDA CR43-100
ADJUST
PWM
V
4.7 F
IN
10kHz TO 50kHz
10kHz TO 50kHz
1.6V TO 3V
2.7V TO 5V
BRIGHTNESS
BRIGHTNESS
C1
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK316BJ105
D1: ON SEMICONDUCTOR MBR0530
L1: SUMIDA CLQ4D10-100
ADJUST
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN EMK316BJ105
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CLQ4D10-4R7
ADJUST
PWM
PWM
V
V
4.7 F
4.7 F
0.1 F
5.1k
IN
IN
R3
C1
C1
C3
0.1 F
0.1 F
9
4
5.1k
R3
5.1k
R3
C3
C3
High Power White LED Driver
GND
SHDN
I
V
ADJ
IN
8
5
Li Ion White LED Driver
2-Cell White LED Driver
LT1618
0.1 F
10 H
9
4
9
4
L1
C
C
[phone]
[phone]
[phone]
[phone]
GND
GND
SHDN
I
SHDN
I
V
ADJ
V
ADJ
IN
IN
SW
ISN
ISP
V
U
8
5
8
5
FB
C
LT1618
LT1618
7
10
0.1 F
4.7 H
0.1 F
10 H
D1
L1
L1
3
2
1
C
C
C
[phone]
[phone]
[phone]
[phone]
C
[phone]
[phone]
[phone]
[phone]
SW
SW
ISP
ISN
ISP
ISN
V
V
FB
FB
C
C
7
10
7
10
0.619
C2
1 F
D1
D1
3
2
1
3
2
1
2.49
2.49
C2
1 F
C2
1 F
R1
2M
R2
121k
80mA
R1
2M
R2
160k
R1
2M
R2
100k
51
20mA
20mA
1618 • TA03a
1618 • TA04a
51
51
1618 • TA05a
51
90
85
80
75
70
65
60
55
50
80
75
70
65
60
55
50
45
40
80
75
70
65
60
55
50
45
40
10
0
0
20
5
OUTPUT CURRENT (mA)
5
30
LED CURRENT (mA)
LED CURRENT (mA)
Efficiency
Efficiency
Efficiency
V
IN
40
= 5V
10
10
V
V
50
IN
IN
V
V
= 3V
IN
= 3.3V
IN
V
V
= 4.2V
V
IN
60
= 3.3V
IN
IN
15
= 2.7V
15
= 2.7V
= 1.6V
70
1618 TA05b
1618 TA03b
1618 TA03b
80
20
20