RT6212C/D
Pin Configuration
(TOP VIEW)
BOOT EN
6
5
FB
4
2
3
GND LX VIN
TSOT-23-6 (FC)
Functional Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
GND
LX
VIN
FB
EN
BOOT
Pin Function
System ground. Provides the ground return path for the control circuitry and
low-side power MOSFET.
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.
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 0.8V 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.
Bootstrap supply for high-side gate driver. Connect a 100nF or greater
capacitor from LX to BOOT to power the high-side switch.
Functional Block Diagram
VIN
6.5K
EN
3V
VEN_
REF
LX
-
+
UVLO
On-
Time
OC
Shutdown
Comparator
Internal
Regulator
VCC
PVCC
BOOT
UGATE
Control
Power
Stage &
Dead-time
Control
LX
UV
Protection
VCC
Ripple
Gen.
FB
+
+
-
LGATE
MIN OFF
Comparator
VCC
VIBIAS
VRef
GND
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2
DS6212C/D-01
September 2018