RT9227A Datasheet, PDF (7/10 Pages) Richtek Technology Corporation – Advanced PWM and Dual Fixed Linear Power Controller

Typical Application Circuit
Preliminary
RT9227A
12V
5V
GND
F1
L1
15A
1µH _{C1-4 +}
4x1000µF
R1 C5-6
10 2x1µF
C20
C7
1µF
1
3.3V
12
VCC
20
+C8
VIN2 OCSET1
Q3
RFD3055
V _OUT3
1.5V
1000µF
15 _GATE3
16 _FB3
PGOOD ⁷
UGATE1 ²⁴
PHASE1 ²³
V _OUT2
2.5V
+ _C9
1000µF
RT9227A
13 _VOUT2
11 _FB2
LGATE1 ²²
PGND ²¹
1000pF
R2
1.21k
POWERGOOD
Q1
PHB83N03LT
R3
L2
10K
PHB95N03LT ^3.5µH _{C13-19 +}
Q2
R4 7x1000µF
4.99K
+ _C10
270µF
VSEN1 ¹⁹
6 _VID0
FB1 ¹⁸
5 _VID1
4 _VID2
FAULT ⁸
3 _VID3
2 _{VID4 GND}
SS ⁹
14
C12
0.039µF
C11
R5 ^0.68µF
732K
V _OUT1
1.3 to 3.5V
DS9227A-02 July 2001
www.richtek-ic.com.tw
7