RT6232A/B
Pin Configuration
(TOP VIEW)
1
2
3
4
8
7
6
5
BOOT
GND
LX
SS
PGOOD
EN
FB
9
VIN
WDFN-8L 2x3
Functional Pin Description
Pin No.
Pin Name
Pin Function
Bootstrap supply for high-side gate driver. Connect a 100nF or greater capacitor
from LX to BOOT to power the high-side switch.
1
BOOT
2,
System ground. Provides the ground return path for the control circuitry and
low-side power MOSFET.
GND
9 (Exposed Pad)
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.
3
4
5
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 0.8V 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.
6
7
8
EN
Power good indicator output. This pin is an open-drain logic output that is pulled
to ground when the output voltage is lower or higher than its specified threshold
under the conditions of OVP, OTP, dropout, EN shutdown, or during slow start.
PGOOD
SS
Soft-start control input. Connect a capacitor from SS to GND to set the soft-start
period.
Functional Block Diagram
VIN
LX
6.5K
-
+
VCC
EN
Internal
Regulator
UVLO
VEN_
REF
PVCC
3V
Shutdown
Comparator
On-
Time
BOOT
LX
OC
UGATE
LGATE
UV & OV
Protection
Power
Stage &
Dead-time
Control
VCC
Control
Ripple
Gen.
VRef
1µA
+
SS
FB
+
-
MIN OFF
Comparator
GND
VCC
-
+
0.9VREF
PGOOD
Comparator
VIBIAS
VRef
PGOOD
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation
www.richtek.com
2
DS6232A/B-02 December 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
