RT8020GQW データシートの表示（PDF） - Richtek Technology

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RT8020GQW

Dual High-Efficiency PWM Step-Down DC-DC Converter

Richtek Technology 

RT8020

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

VIN2

Power Input of Channel 2.

2

LX2

Pin for Switching of Channel 2.

3, 9,

GND

Exposed Pad (13)

Ground. The exposed pad must be soldered to a large PCB and connected to

GND for maximum power dissipation.

4

FB1

Feedback of Channel 1.

5, 11

6

7

NC1, NC2

EN1

VIN1

No Connection or Connect to VIN.

Chip Enable of Channel 1 (Active High). VEN1 ≦ VIN1.

Power Input of Channel 1.

8

LX1

Pin for Switching of Channel 1.

10

FB2

12

EN2

Feedback of Channel 2.

Chip Enable of Channel 2 (Active High). VEN2 ≦ VIN2.

Function Block Diagram

ENx

Slope

Compensation

OSC and

Shutdown

Control

Current

Sense

Current Limit

Detector

PWM

Comparator

Control

Logic

Error

Amplifier

FBx

RC

COMP

UVLO and

Power Good

Detector

VREF

VINx

RS1

Driver

LXx

RS2

GND

DS8020-03 August 2007

www.richtek.com

3

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