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Part Name
Description
RT9209A View Datasheet(PDF) - Richtek Technology
Part Name
Description
Manufacturer
RT9209A
Synchronous Buck PWM DC-DC with Enable & PGOOD
Richtek Technology
RT9209A Datasheet PDF : 14 Pages
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RT9209/A
C
VCC
1uF
C
OUT
1000uF
L
5uH
GND
VCC
BOOT
RT9209/A
C
BOOT
0.1uF
MU
D
GS
Diode
C
IN1
C
IN2
1uF 470uF
Layout Placement
GND Return
Layout Notes
1. Put C
IN1
& C
IN2
to be near the MU drain and ML source nodes.
2. Put RT9209/A to be near the C
OUT
3. Put C
BOOT
as close as to BOOT pin
4. Put C
VCC
as close as to VCC pin
Function Block Diagram
VCC
PGOOD
FB
GND
+
-
PGOOD
0.72V
0.8
Reference
Power on
Reset
Soft Start
1V
-
+
OVP
-
0.5V
+
UVP
0.8V
+
-
Error
SS
Amplifier
PWM Loop
Compensation
+
+
PWM
-
260kHz/300kHz
Oscillator
6.5V
Regulation
Control
Logic
VCC
BOOT
SS
UGATE
LGATE
DS9209/A-08 March 2007
www.richtek.com
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