RT6266
Pin Configurations
(TOP VIEW)
8
VIN
BOOT
EN
SW
2
3
4
7
6
5
GND
CSP
CSN
GND
9
FB
SOP-8 (Exposed Pad)
Functional Pin Description
Pin No.
Pin Name
Pin Function
Input Supply Voltage, 7.5V to 36V. Must bypass with a suitably large ceramic
capacitor.
1
VIN
Bootstrap for High-Side Gate Driver. Connect 0.1F or greater ceramic
capacitor from BOOT to SW pins.
2
3
BOOT
EN
Enable Input Pin. A logic high enables the converter; a logic low forces the
RT6266 into shutdown mode reducing the supply current to less than 3A.
Attach this pin to VIN with a 100k pull up resistor for automatic startup.
Feedback Input Pin. This pin is connected to the converter output. It is used to
set the output of the converter to regulate to the desired value via an external
resistive voltage divider. For an adjustable output, an external resistive divider
is connected to this pin.
4
FB
Current Sense Negative Input. It is used for load current limiting and load line
drop compensation.
5
6
CSN
CSP
Current Sense Positive Input. It is used for load current limiting and load line
drop compensation.
7,
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation. (Connect the exposed pad to Pin 7)
GND
SW
9 (Exposed Pad)
8
Switch Output -- Connect to external L-C filter and Schottky diode.
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS6266-00 March 2015
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
