RT2862A
Pin Configurations
(TOP VIEW)
8
SW
BOOT
EN
VIN
RT
2
3
4
7
6
5
GND
COMP
FB
9
GND
SOP-8 (Exposed Pad)
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
SW
Switch Node. Connect to external L-C filter.
Bootstrap Supply for the High-Side MOSFET. Connect a 100nF or greater
capacitor between the BOOT and SW pins.
2
3
BOOT
EN
Enable Control Input. A logic-high enables the converter; a logic-low forces the
device into shutdown mode.
4,
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum thermal dissipation.
GND
FB
9 (Exposed Pad)
Feedback Voltage Input. This pin is used to set the output voltage of the
converter to regulate to the desired value via an resistive divider.
5
6
Compensation Node. COMP is used to compensate the regulation control loop.
Connect a R-C network from the COMP to GND. In some cases, an additional
capacitor from COMP to GND is required.
COMP
Switching Frequency Setting. Connect an external resistor to set the switching
frequency from 300kHz to 1MHz.
7
8
RT
Power Input. The input voltage range is from 4.5V to 36V. Must bypass with a
suitable large ceramic capacitor at this pin.
VIN
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is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS2862A-02 January 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
