RT6222A/B
Pin Configuration
(TOP VIEW)
SW VIN EN
6
5
2
4
3
Marking Information
RT6222AHGJ6F
1K= : Product Code
1K=DNN
DNN : Date Code
RT6222BHGJ6F
BOOT GND FB
TSOT-23-6 (FC)
1J=DNN
1J= : Product Code
DNN : Date Code
Functional Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
BOOT
GND
FB
EN
VIN
SW
Pin Function
Bootstrap supply for high-side gate driver. Connect a 0.1F ceramic capacitor
between the BOOT and SW pins.
Power ground.
Feedback voltage input. The pin is used to set the output voltage of the converter
via a resistive divider. The converter regulates V
FB
to 0.6V
Enable control input. Connect EN to a logic-high voltage to enable the IC or to a
logic-low voltage to disable. Do not leave this high impedance input unconnected.
Power input. The input voltage range is from 4.3V to 18V. Must bypass with a
suitable large ceramic capacitor at this pin.
Switch node. Connect to external L-C filter.
Functional Block Diagram
BOOT
V
IN
Reg
VIBIAS
VCC
V
REF
Min off
VCC
UGATE
Control
UV
VCC
SW
Ripple
Gen.
+
+
-
Comparator
EN
GND SW
V
IN
On-Time
SW
Driver
LGATE
GND
SW
VIN
OC
FB
EN
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS6222A/B-01 August 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
