RT9203 RICHTEK [Richtek Technology Corporation], RT9203 Datasheet - Page 4

• Manufacturer Part Number: RT9203
• Description: Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9203/A
Function Block Diagram
www.richtek.com
4
VCC
GND
DRV
FBL
FB
C
1uF
Layout Notes
1. Put C1 & C2 to be near the MU drain and ML source nodes.
2. Put RT9203/A to be near the C
3. Put C
4. Put C
VCC
Reference
Error
0.8V
VCC
0.8
LDO
GND
VCC
BOOT
VCC
+
-
+
+
-
Amplifier
RT9203/A
Error
as close as to VCC pin
as close as to BOOT pin
0.5V
BOOT
1V
SS
Oscillator
300kHz
1000uF
-
+
-
+
-
+
C
UVP
OVP
UVP
Power on
Soft Start
OUT
Reset
Layout Placement
C
0.1uF
Preliminary
BOOT
+
+
-
PWM
OUT
5uH
L
Control
Logic
G
G
Regulation
MU
ML
D
D
6.0V
S
S
GND Return
VCC
1uF
C1
DS9203/A-10 March 2007
470uF
C2
LGATE
UGATE
BOOT