8
LT1944-1
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2001
19441f LT/TP 0801 2K • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1307 Single-Cell Micropower 600kHz PWM DC/DC Converter 3.3V at 75mA from One Cell, MSOP Package
LT1316 Burst Mode
TM
Operation DC/DC with Programmable Current Limit 1.5V Minimum, Precise Control of Peak Current Limit
LT1317 2-Cell Micropower DC/DC with Low-Battery Detector 3.3V at 200mA from Two Cells, 600kHz Fixed Frequency
LT1610 Single-Cell Micropower DC/DC Converter 3V at 30mA from 1V, 1.7MHz Fixed Frequency
LT1611 1.4MHz Inverting Switching Regulator in 5-Lead ThinSOT –5V at 150mA from 5V Input, Tiny ThinSOT Package
LT1613 1.4MHz Switching Regulator in 5-Lead ThinSOT 5V at 200mA from 3.3V Input, Tiny ThinSOT Package
LT1615 Micropower DC/DC Converter in 5-Lead ThinSOT 20V at 12mA from 2.5V Input, Tiny ThinSOT Package
LT1617 Micropower Inverting DC/DC Converter in 5-Lead ThinSOT –15V at 12mA from 2.5V Input, Tiny ThinSOT Package
LT1930A 2.2MHz Boost DC/DC Converter in ThinSOT 5V at 450mA from 3.3V, Tiny ThinSOT Package
LT1944 Dual Micropower Step-Up DC/DC Converter 5V at 80mA and 30V at 8mA, MSOP Package
Burst Mode is a trademark of Linear Technology Corporation
Four Output Power Supply (±5V, ±15V)
V
IN
SW2
FB1
LT1944-1
2
3
L1
22µH
D1
SHDN1
324k
1M
C2
4.7µF
5V
20mA
15V
2mA
–15V
2mA
–5V
20mA
V
IN
2.7V
TO 4.2V
1944-1 TA03
GND
7
PGND
9
PGND
10
86
SW1
4.7pF
C1
4.7µF
FB2
4
1
5
SHDN2
L2
22µH
D2
D3
D4
D6
D5
2M
178k
C3
1µF
4.7pF
C1, C2, C7: TAIYO YUDEN JMK212BJ475
C3, C4: TAIYO YUDEN EMK212BJ105
C5, C6: TAIYO YUDEN EMK107BJ104
D1, D2, D3, D4, D5, D6: CENTRAL SEMI CMDSH3
L1, L2: MURATA LQH3C220
C5
0.1µF
C6
0.1µF
C7
4.7µF
C4
1µF
U
TYPICAL APPLICATIO