rt9201 Richtek Technology Corporation, rt9201 Datasheet - Page 3

• Manufacturer Part Number: rt9201
• Description: High Efficiency Step-down Dc-dc Converter
• Manufacturer: Richtek Technology Corporation

Suggested Capacitors For C
Function Block Diagram
Functional Pin Description
DS9201-04 August 2004
Exposed Pad
Pin Number Pin Name
Component Supplier
TAIYO YUDEN
4, 10
1
2
3
5
6
7
8
9
Panasonic
SS
FB
TDK
0.8V
PGND
PVDD
GND
GND
VDD
EN
FB
NC
SS
LX
300k
V
REF
Amplifier
C2012X5R0J106M
C3225X5R0J226M
ECJ2FB0J106M
ECJHVB0J226M
JMK212BJ106M
JMK212BJ226MG
JMK316BJ226ML
Error
Tie this pin to 1.4V or higher to enable the device. Tie below 0.4V to shut-down.
Feedback Input pin. Connect a resistive voltage divider from the output voltage to FB to
GND.
No Connection
Analog Ground
Power Ground
Switch node. Drains of the internal P-Channel and N-Channel MOSFET switches.
Connect an inductor to LX pins together as close as possible.
Device Input Power Pin.
Exposed pad should be soldered to PCB board and connected to GND
GND
Soft Start, connect a capacitor from this pin to GND.
Main Power Supply Pin.
VDD
IN
and C
OSC & Shutdown
Part No.
Compensation
OUT
Control
Slope
EN
Comparator
PWM
Preliminary
Capacitance (uF)
10
22
10
22
10
22
22
Current
Detector
Sense
Control
Logic
Zero
Pin Function
Driver
Case Size
0805
1210
0805
1206
0805
0805
1206
PGND
PVDD
RT9201
www.richtek.com
LX
3