RT9202 Datasheet, PDF (2/16 Pages) Richtek Technology Corporation – SINGLE SYNCHRONOUS BUCK PWM DC-DC CONTROLLER

RT9202
Typical Application Circuit
SHDN
H: shutdown
Q2
2N7002
R1
20K
R4
10
D1
8
PHASE
BOOT ¹
7
OCSET
UGATE ²
6
RT9202
FB
GND
3
5 _VCC
LGATE ⁴
C2 MA732
0.1µF
V_{OU T}
2.5V
L2
5µH
+ _C3
1000µF
C4
1µF
R3
R2
120
255
C6
10nF
5V
MU
C5 ⁺ C1
1µF 470µF
ML
Fig.1 RT9202 powered from 5V only
H: shutdown
SHDN
Q1
2N7002
R4
R1
10
20K
8 _PHASE
BOOT ¹
7 _{OCSET UGATE} 2
RT9202
6 _FB
GND ³
5 _VCC
C4
1µF
LGATE ⁴
R3
120
C2
1µF
V_{OU T}
2.5V
R2
250
C6
10nF
L1
5µH
+ _C3
1000µF
Fig.2 RT9202 powered from 12V
12V
5V
MU
C5 ⁺ C1
1µF 470µF
ML
www.richtek.com
2
DS9202-02 August 2002