rt9202b Richtek Technology Corporation, rt9202b Datasheet - Page 3

• Manufacturer Part Number: rt9202b
• Description: Single Synchronous Buck Dc-dc Controller
• Manufacturer: Richtek Technology Corporation

Function Block Diagram
DS9202B-03 March 2007
VCC
GND
FB
C
1uF
VCC
Reference
Error
0.8V
Bias
0.8
GND
VCC
+
-
RT9202B
Amplifier
Error
1.1V
Layout Notes
1. Put CIN1 & CIN2 to be near the MU drain and ML source nodes.
2. Put RT9202B to be near the C
3. Put C
4. Put C
0.5V
BOOT
Oscillator
1000uF
300kHz
C
+
UVP
+
-
OVP
-
OUT
BOOT
Power on
VCC
Soft Start
Reset
Layout Placement
C
0.1uF
BOOT
as close as to VCC pin
as close as to BOOT pin
PWM
+
-
5uH
L
Control
Logic
G
G
OUT
MU
Regulation
ML
D
D
6.0V
S
S
OC
+
-
GND Return
VCC
C
1uF
IN1
C
470uF
IN2
20uA
RT9202B
www.richtek.com
PHASE
OCSET
LGATE
UGATE
BOOT
3