LT1930 Linear Technology, LT1930 Datasheet - Page 9

• Manufacturer Part Number: LT1930
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: Linear Technology

TYPICAL APPLICATIO S
3.3V
V
IN
V
5V
IN
C1: TAIYO-YUDEN X5R JMK212BJ475MG www.t-yuden.com
C2: TAIYO-YUDEN X5R JMK316BJ106ML
D1: ON SEMICONDUCTOR MBR0520 www.onsemi.com
L1: SUMIDA CR43-5R6 www.sumida.com
OFF ON
C1
4.7 F
C1: TAIYO-YUDEN X5R LMK212BJ225MG
C2: TAIYO-YUDEN X5R EMK316BJ225ML
D1: ON SEMICONDUCTOR MBR0520
L1: MURATA LQH3C2R2M24
SHDN
C1
2.2 F
5V to 12V, 250mA Step-Up Converter
4
SHDN
V
3.3V to 5V Boost Converter
4
IN
5
SHDN
LT1930
V
5.6 H
GND
IN
L1
5
LT1930A
2
2.2 H
GND
L1
SW
2
FB
1
3V to 6V
SW
3
FB
1
V
D1
IN
3
D1
U
M1
C1: TAIYO-YUDEN X5R LMK432BJ226MM
C2: TAIYO-YUDEN X5R LMK212BJ225MG
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CR43-4R7
M1: SILICONIX Si6433DQ
R1
40.2k
R2
13.3k
Boost Converter with Reverse Battery Protection
R1
115k
R2
13.3k
SHDN
C1
2.2 F
1930/A TA08a
C2
2.2 F
4
V
12V
250mA
OUT
1930/A TA07a
SHDN
V
C2
10 F
IN
5
V
5V
480mA
OUT
LT1930
4.7 H
GND
L1
2
SW
FB
1
D1
3
R1
60.4k
R2
11.3k
C3
47pF
70
90
85
80
75
65
60
55
50
85
80
70
65
60
50
90
75
55
0
1930/A TA06
0
V
8V
520mA AT V
240mA AT V
C2
22 F
V
V
OUT
IN
OUT
= 5V
50
= 12V
100
Efficiency
IN
IN
LOAD CURRENT (mA)
LOAD CURRENT (mA)
100
= 6V
= 3V
Efficiency
200
LT1930/LT1930A
V
150
IN
= 2.6V
300
200
V
IN
= 3.3V
400
250
1930/A TA07b
1930/A TA08b
500
300
9