RT6216E
Functional Pin Description
Pin No.
Pin Name
Pin Function
Mode Selection Input. Set MODE pin high will force RT6216E into CCM.
Connect MODE to VIN with a 100k resistor for CCM application. Connect
MODE pin to ground to force RT6216E into Pulse Skipping Mode for light load.
Do not float MODE pin.
1
MODE
Input Voltage. Support 4.5V to 24V Input Voltage. Must bypass with a suitable
large ceramic capacitor at this pin.
2
VIN
3
4
SW
Switch node. Connect to external L-C filter.
System Ground.
GND
Bootstrap, supply for high side gate driver. Connect a 0.1F ceramic capacitor
between the BOOT and SW pins.
5
BOOT
6
7
EN
NC
Buck Enable. High = Enable.
This pin is left floating.
Feedback Input. The pin is used to set the output voltage of the converter to
regulate to the desired via a resistive divider.
8
FB
Function Block Diagram
VIN
BOOT
NC
MODE
VIN
VCC
3.5V
Minoff
Reg
VCC
UGATE
OC
UV
Driver
Control
SW
VREF
VIBIAS
LGATE
GND
SW
GND
VCC
Ripple
Gen.
EN
EN
SW
+
VIN
+
-
Comparator
On
SW
Time
FB
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2
DS6216E-03 July 2016
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
