RT8009-12GB Richtek USA Inc, RT8009-12GB Datasheet - Page 3

• Manufacturer Part Number: RT8009-12GB
• Description: IC DCDC CONV STP-DN SYNC SOT23-5
• Manufacturer: Richtek USA Inc
• Type: Step-Down (Buck), PWMr

Specifications of RT8009-12GB

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.2V
• Current - Output: 600mA
• Frequency - Switching: 1.25MHz
• Voltage - Input: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SC-74A, SOT-753
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Pin Description
Function Block Diagram
DS8009-06 February 2011
Pin Number
FB/VOUT
1
2
3
4
5
VIN
GND
EN
FB/VOUT
LX
Pin Name
Compensation
Amplifier
Slope
Error
COMP
Power Input.
Ground.
Chip Enable (Active High, do not leave EN pin floating, and V
Feedback Input Pin.
Pin for Switching.
RC
Power Good
Detector
UVLO &
Comparator
Shutdown
Current
Control
OSC &
Sense
PWM
EN
V
REF
Detector
Detector
Current
Control
Logic
Limit
Zero
Pin Function
GND
Driver
EN
VIN
< V
RS1
RS2
RT8009
IN
www.richtek.com
+ 0.6V).
LX
3