LTC1474_15 Datasheet, PDF (17/20 Pages) Linear Technology – Low Quiescent Current High Efficiency Step-Down Converters

TYPICAL APPLICATIONS
LTC1474/LTC1475
V_IN
4V TO 18V ₊
4.7µF^†
35V
2.2M
1M
100k
RUN
* SUMIDA CDRH73-101
† _{AVX TPSC475M035}
†† _{AVX TPSC107M006}
7
6
SENSE
V_IN
1
V_OUT
3
LBI
LTC1474-3.3
LBO
2
8
5
RUN _GND SW
4
0.1µF
+
L*
100µH
100µF^††
6.3V
V_OUT
3.3V
250mA
D1
MBR0530
1474/75 F16
Figure 16. High Efficiency 3.3V Regulator with Low Battery Lockout
V_IN
5.7V TO 18V ₊
4.7µF**
35V
3.65M
7
6
SENSE
V_IN
1
V_OUT
LTC1475-5
3
LBI/OFF
2
LBO
OFF _1M
100k ₈
5
ON
GND
SW
ON
4
0.1µF
+
L*
100µH
33µF^†
10V
V_OUT
5V
250mA
D1
MBR0530
Figure 17. Pushbutton On/Off 5V/250mA Regulator
* SUMIDA CDRH73-101
** AVX TPSC475M035
† _{AVX TPSC336M010}
1474/75 F17
V_CC
V_IN
4V TO 18V ₊
4.7µF**
35V
0.1µF
MMBD914LT1
0.1µF
ON/OFF
6
100k ₈
SENSE
ON
7
V_{IN VOUT} 1
2
LTC1475-3.3
2.2M LBO
+
L*
100µH
V_OUT
3.3V
100µF^{† 250mA}
6.3V
3
LBI/OFF _GND
5
SW
1M
4
µC
* SUMIDA CDRH73-101
** AVX TPSC475M035
† _{AVX TPSC107M006}
D1
MBR0530
1474/75 F18
Figure 18. LTC1475 Regulator with 1-Button Toggle On/Off
17