LTC1475_15 Datasheet, PDF (20/20 Pages) Linear Technology – Low Quiescent Current High Efficiency Step-Down Converters

LTC1474/LTC1475
TYPICAL APPLICATION
V_IN
3.5V to 18V
10pF
+
1M
4.7µF**
35V
MMBT2N2222LT1
1.8M
100k
1M
ON
OFF
7
6
SENSE
V_IN
8 _{ON LTC1475}
1
V_FB
2
LBO
3 _{LBI/OFF GND}
4
5
SW
0.1µF
1.02M
1%
1M
1%
D1
MBR0530
Figure 19. Pushbutton On/Off with Low Battery Lockout
+
L*
100µH
100µF^†
6.3V
V_OUT
2.5V
250mA
* SUMIDA CDRH73-101
** AVX TPSC475M035
† _{AVX TPSC107M006}
1474/75 F19
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PART NUMBER
DESCRIPTION
COMMENTS
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I_Q = 2.8µA Max
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I_Q(MIN) = 10µA
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417^q [phone]
FAX: [phone]^q TELEX: 499-3977 ^q www.linear-tech.com
sn14745 14745fas LT/TP 0398 4K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1997