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RT9174CS Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT9174CS
Description  Triple Linear Regulator Controllers
PDF  8 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9174CS Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT9174
Preliminary
www.richtek-ic.com.tw
DS9174-00 April 2001
2
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
RT9174
4
3
2
1
DRI1
DRI2
DRI3
FB1
FB2
FB3
GND
VDD
5
6
7
8
+
+
+
R4
250
Q2
2SD1802
R5
200
C3
470
µF
R7
200
R6
424
Q3
2SD1802
1.8V
C4
470
µF
2.5V
C1
1
µF
R1
5K
C6
10nF
D1
1N4148
R8
1K
C5
0.1
µF
Q1
PHD45N03LT
R2
4.3K
R3
4.99K
C2
1000
µF
VO3
3.3V
VO2
5V
3.3V
#TYPEDET
3.3V
12V
VDDQ
1.5/ 3.3V
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



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