RT6220
Functional Pin Description
Pin No.
1
2
3
4
5, 6, 14
7
8, 9, 15, 16
10
Pin Name
VIN
PGND
VBYP
PGOOD
AGND
VOUT
SW
BOOT
Pin Function
Power input connect to high-side MOSFET drain. Place 2pcs 10F MLCC decoupling
capacitors near input pin.
Power ground. Connect power ground pin with wide and thick trace, adding thermal
vias for better heat dissipation.
Switch over input supply voltage for VCC. A low pass filter should be connected to
AGND if V
BYP
is applied, the recommended RC filter value is R
BYP
= 5.1 and C
BYP
=
2.2F. If V
BYP
is not used, then connect this pin to AGND. Do not connect to VCC pin.
This pin should be connected to a pull high voltage with a 100k resistor.
Analog ground.
Output voltage sense input. An internal discharging circuit is connected to this pin.
Switch node.
Bootstrap supply for high-side gate driver. A capacitor is needed to drive the power
switch's gate above the supply voltage. It is connected between the SW and BOOT
pins to form a floating supply across the power switch driver. Recommended design
value is R
BOOT
= 2.2 and C
BOOT
= 0.1F.
5V linear regulator output for internal control circuit. Bypass V
CC
to AGND with a 2.2F
capacitor. V
CC
can only supply internal circuits. Do not connect to external loads.
Feedback voltage input.
Enable control input. Do not leave this pin floating. The slew rate of EN is
recommended to be slower than 4.8V/s. User should add a RC circuit to avoid glitch
noise.
11
12
13
VCC
FB
EN
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6220-10
December 2019
www.richtek.com
3
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
