20
LTC1474/LTC1475
TYPICAL APPLICATIO
U
sn14745 14745fas LT/TP 0398 4K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1997
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
(408) 432-1900
FAX: (408) 434-0507
●
TELEX: 499-3977
●
www.linear-tech.com
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1096/LTC1098 Micropower Sampling 8-Bit Serial I/O A/D Converter I
Q
= 80µA Max
LT1121/LT1121-3.3/LT1121-5 150mA Low Dropout Regulator Linear Regulator, I
Q
= 30µA
LTC1174/LTC1174-3.3/LTC1174-5 High Efficiency Step-Down and Inverting DC/DC Converters Selectable I
PEAK
= 300mA or 600mA
LTC1265 1.2A High Efficiency Step-Down DC/DC Converter Burst Mode
Operation, Internal MOSFET
LT1375/LT1376 1.5A 500kHz Step-Down Switching Regulators 500kHz, Small Inductor, High
Efficiency Switchers, 1.5A Switch
LTC1440/LTC1441/LTC1442 Ultralow Power Comparator with Reference I
Q
= 2.8µA Max
LT1495/LT1496 1.5µA Precision Rail-to-Rail Op Amps I
Q
= 1.5µA Max
LT1521/LT1521-3/LT1521-3.3/ 300mA Low Dropout Regulator Linear Regulator, I
Q
= 12µA
LT1521-5
LTC1574/LTC1574-3.3/LTC1574-5 High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode LTC1174 with Internal Schottky Diode
LT1634-1.25 Micropower Precision Shunt Reference I
Q(MIN)
= 10µA
Figure 19. Pushbutton On/Off with Low Battery Lockout
1474/75 F19
V
IN
GND
SENSE
LBI/OFF
ON
V
FB
LBO
SW
LTC1475
6
3
8
1
2
5
7
4
100k
1.02M
1%
OFF
ON
4.7µF**
35V
0.1µF
V
IN
3.5V to 18V
1M
1%
1.8M
10pF
L*
100µH
D1
MBR0530
+
+
100µF
†
6.3V
V
OUT
2.5V
250mA
1M
MMBT2N2222LT1
1M
* SUMIDA CDRH73-101
** AVX TPSC475M035
†
AVX TPSC107M006
