RT6212A/B
Pin Configuration
(TOP VIEW)
BOOT EN FB
6
5
4
2
3
LX
GND
VIN
TSOT-23-6 (FC)
Functional Pin Description
Pin No.
Pin Name
Pin Function
System ground. Provides the ground return path for the control circuitry and
low-side power MOSFET.
1
GND
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.
2
3
4
LX
VIN
FB
Power input. Supplies the power switches of the device.
Feedback voltage input. This pin is used to set the desired output voltage via
an external resistive divider. The feedback voltage is 0.765V/0.8V typically.
Enable control input. Floating this pin or connecting this pin to GND can disable
the device and connecting this pin to logic high can enable the device.
5
6
EN
Bootstrap supply for high-side gate driver. Connect a 100nF or greater
capacitor from LX to BOOT to power the high-side switch.
BOOT
Functional Block Diagram
BOOT
VIN
VIN
PVCC
Reg
VCC
Minoff
PVCC
VIBIAS
VREF
UGATE
OC
LX
Control
Driver
LGATE
UV &OV
GND
EN
LX
GND
VCC
Ripple
Gen.
EN
LX
VIN
On-Time
+
+
-
LX
Comparator
FB
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2
DS6212A/B-05 July 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
