RT6257A/B
Functional Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
FB
EN
GND
VIN
LX
BOOT
Pin Function
Feedback voltage input. This pin is used to set the desired output voltage via an
external resistive divider.
Enable control input. Connecting this pin to logic high can enable the device and
connecting this pin to GND can disable the device.
System ground. Provides the ground return path for the control circuitry and low-side
power MOSFET.
Power input. Supplies the power switches of the device.
Switch node. LX is the switching node that supplies power to the output and connect
the output LC filter from LX to the output load.
Bootstrap supply for high-side gate driver. Connect a 0.1F ceramic capacitor from LX
to BOOT to power the high-side switch.
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6257A/B-03 October
2018
www.richtek.com
3
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
