RT8223BGQW Просмотр технического описания (PDF) - Richtek Technology

Номер в каталоге

Компоненты Описание

производитель

RT8223BGQW

High Efficiency, Main Power Supply Controller for Notebook Computers

Richtek Technology 

RT8223A/B

PGND (Pin 15)

Power Ground for SMPS controller. Connect PGND

externally to the underside of the exposed pad.

VIN (Pin 16)

High Voltage Power Supply Input for 5V/3.3V LDO and

Feed-forward ON-Time circuitry.

VREG5 (Pin 17)

5V Linear Regulator Output.VREG5 is also the supply

voltage for the low-side MOSFET driver and analog supply

voltage for the device.

NC (Pin 18) (RT8223A)

No Internal Connection.

ENC (Pin 18) (RT8223B)

SMPSx Enable Input. Pull up to VREG3 or VREG5 to

turn on both switcher channels. Short to GND to shutdown

them.

LGATE1 (Pin 19)

SMPS1 Synchronous Rectifier Gate Drive Output. LGATE1

swings between PGND and VREG5.

PHASE1 (Pin 20)

Inductor Connection for SMPS1. PHASE1 is the internal

lower supply rail for the UGATE1 high side gate driver.

PHASE1 is also the current sense input for the SMPS1.

UGATE1 (Pin 21)

High-Side MOSFET Floating Gate Driver Output for

SMPS1. UGATE1 swings between PHASE1 and BOOT1.

BOOT1 (Pin 22)

Boost Flying Capacitor Connection for SMPS1. Connect

to an external capacitor according to the typical application

circuits.

PGOOD (Pin 23)

Power Good Output for channel 1 and channel 2. (Logical

AND)

VOUT1 (Pin 24)

SMPS1 Output Voltage-Sense Input. Connect to the

SMPS1 output. VOUT1 is an input to the on-time one

shot circuit. It also serves as the SMPS1 feedback input

in fixed-voltage mode.

DS8223A/B-04 April 2011

www.richtek.com

7

Share Link: