RT9174CS 查看數據表（PDF） - Richtek Technology
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RT9174CS Datasheet PDF : 8 Pages
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RT9174
Preliminary
Pin Description
Pin Name Pin Function
VDD
Power Supply Input
DRI1
Regulator 1 Driver Output
FB1
Regulator 1 Feedback Non-inverting Input
GND
Ground
DRI2
Regulator 2 Driver Output
FB2
Regulator 2 Feedback Non-inverting Input
DRI3
Regulator 3 Driver Output
FB3
Regulator 3 Feedback Non-inverting Input
Typical Application Circuit
12V
C5
0.1µF
3.3V
Q1
PHD4 5N 03 L T
VDDQ
1.5/ 3.3V
C2 +
1000µF
R2
4.3K
R3
4.99K
5V
C1
1µF
R1
5K
C6
10nF
1
VDD
2 DRI1
3 FB1
4 GND
8
DRI3
FB3 7
DRI2 6
FB2 5
D1
RT9174
1N4148
3.3V
R8
1K
#TYPEDET
Q2
2 SD 18 02
R4
250 +
R5
200
VO2
1.8V
C3
470µF
VDDQ = 3.3V if FB1 >1.3V
#TYPEDET = 0V →VDDQ = 1.5V
#TYPEDET = Open →VDDQ = 3.3V
Fig 1. Triple LDOs with VDDQ for M/B Application
3.3V
Q3
2 SD 18 02
R6
424 +
R7
200
VO3
2.5V
C4
470µF
www.richtek-ic.com.tw
2
DS9174-00 April 2001
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