RT6224A/B
Marking Information
RT6224AHGJ6F
20= : Product Code
RT6224BHGJ6F
1Z= : Product Code
DNN : Date Code
20=DNN
1Z=DNN
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. Connected to external L-C filter.
Functional Block Diagram
BOOT
VIN
Reg
VIBIAS
V
CC
V
REF
Min off
V
CC
UGATE
Control
UV
V
CC
SW
Ripple
Gen.
+
+
-
Comparator
EN
GND SW
VIN
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
DS6224A/B-02 August 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
