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
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PART NUMBER DESCRIPTION COMMENTS
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Q
= 80µA Max
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Q
= 30µA
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= 2.8µA Max
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Q
= 1.5µA Max
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= 12µA
LT1521-5
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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