RT9174CS 查看數據表（PDF） - Richtek Technology
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RT9174CS Datasheet PDF : 8 Pages
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Preliminary
RT9174
12V
C5
0.1µF
3.3V
Q1
PHD4 5N 03 LT
VDDQ
1.5/ 3.3V
+
R2
4.3K
R3
4.99K
5V
C1
1µF
R1
5K
C6
10nF
1 VDD
2 DRI1
3 FB1
4 GND
8
DR I3
FB3 7
DRI2 6
FB2 5
D1
RT9174
1N4148
3.3V
R8
1K
#TYPEDET
VTTSEL
VDDQ = 3.3V if FB1 >1.3V
#TYPEDET = 0V →VDDQ = 1.5V
#TYPEDET = Open →VDDQ = 3.3V
VTTSEL = 0V →VTT = 1.25V
VTTSEL = 5V →VTT = 1.5V
VTTPG
R9
1K
R10
Q3
1K
MMBT3904
C8
0.01µF
3.3V
Q2
2SD 18 02
R4
113 + C3
R11 R5
470µF
374 200
Q4
2N7002
VTT
R6
3K
C7
1µF
R12
8.2K
Fig 2. Dual LDOs with VTTPG for VRM8.5 Application
12V
C5
0.1µF
R9
1.2K
7.5V
R1 R8
C1
5K 3K
1µF
5V
Q1
PHD4 5N 03 L T
VO1
3.3V
R2
624
C2 +
1000µF
R3
200
1 VDD
2 DRI1
3 FB1
4 GND
8
DR I3
FB3 7
DRI2 6
FB2 5
RT9174
3.3V
Q2
PHD45N03LT VO2
R4
250 +
R5
200
1.8V
C3
470µF
Q3
PHD4 5N 03 L T
R6
424 +
R7
200
VO3
2.5V
C4
470µF
Fig 3. Triple LDOs Driving MOS Application
DS9174-00 April 2001
www.richtek-ic.com.tw
3
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