16
LT1614
LINEAR TECHNOLOGY CORPORATION 1998
sn1614 1614fs LT/TP 1000 4K • PRINTED IN THE USA
PART NUMBER DESCRIPTION COMMENTS
LTC
®
1174 High Efficiency Step-Down and Inverting DC/DC Converter Selectable I
PEAK
= 300mA or 600mA
LT1307 Single Cell Micropower 600kHz PWM DC/DC Converter 3.3V at 75mA from 1 Cell, MSOP Package
LT1308 Single Cell High Current Micropower 600kHz Boost Converter 5V at 1A from a Single Li-Ion Cell, SO-8 Package
LT1316 Micropower Boost DC/DC Converter Programmable Peak Current Limit, MSOP Package
LT1317 Micropower 600kHz PWM DC/DC Converter 2 Cells to 3.3V at 200mA, MSOP Package
LTC1474 Low Quiescent Current High Efficiency DC/DC Converter I
Q
= 10µA, Programmable Peak Current Limit, MSOP
LT1610 1.7MHz Single Cell Micropower DC/DC Converter 5V at 200mA from 3.3V, MSOP Package
LT1611 Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23 –5V at 150mA from 5V Input, Tiny SOT-23 Package
LT1613 1.4MHz Switching Regulator in 5-Lead SOT-23 5V at 200mA from 3.3V Input, Tiny SOT-23 Package
LT1615 Micropower Constant Off-Time DC/DC Converter in 5-Lead SOT-23 20V at 12mA from 2.5V, Tiny SOT-23 Package
LT1617 Micropower Inverting DC/DC Converter in 5-Lead SOT-23 –15V at 12mA from 2.5V, Tiny SOT-23 Package
LT1930 1.2MHz Boost DC/DC Converter in 5-Lead SOT-23 5V at 480mA from 3.3V Input, V
OUT
Up to 34V
LT1931 1.2MHz Inverting DC/DC Converter in 5-Lead SOT-23 –5V at 350mA from 5V Input, 1mV
P-P
Output Ripple
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
V
IN
SW
LT1614
L1
22µH
V
IN
3V TO 5V
D1
NFB
SHDN
69.8k
24.9k
100k
1nF
V
OUT
–5V
200mA
C1: TAIYO YUDEN LMK316BJ475ML
C2: TAIYO YUDEN JMK316BJ106ML
C3: TAIYO YUDEN EMK316BJ105MF
D1: MOTOROLA MBR0520
L1, L2: MURATA LQH3C220 OR SUMIDA CD43-220
1614 TA07
C1
4.7µF
C2
10µF
V
C
GND
L2
22µH
C3
1µF
1nF
LOAD CURRENT (mA)
1
EFFICIENCY (%)
1614 TA08
10 100
80
75
70
65
60
55
50
45
40
V
IN
= 3V
V
OUT
= –5V
5V to –5V Converter Uses All Ceramic Capacitors
Efficiency vs Load Current
TYPICAL APPLICATIO S
U
