RT5047 Просмотр технического описания (PDF) - Richtek Technology

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RT5047

Single Output LNB Supply and Control Voltage Regulator

Richtek Technology 

RT5047

Marking Informaton

RT5047

GSPYMDNN

RT5047GSP : Product Number

YMDNN : Date Code

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

LNB

Output Voltage for LNB.

2

BOOST

Boost Output and Tracking Supply Voltage to LNB.

3

LX

Switching Node of DC/DC Boost Converter.

4

VIN

Power Supply Input.

5

EN

LNB Output Enable.

6

SEL

LNB Output Voltage Selection Pin (Low is for 13.3V, high is for 18.3V).

7

NC

No Internal Connection. Pull to GND by 4.7k resistor.

8

TONE

9 (Exposed Pad) GND

22kHz TONE Input.

Ground. The Exposed Pad must be soldered to a large PCB and connected

to GND for maximum power dissipation.

Function Block Diagram

VIN

UVLO

VR1

VFB1

Error

Amp

LX

OCP1

PWM

Controller

BOOST

RF1

RF2

EN

OSC

Oscillator

SEL

2-steps

Voltage

Setting

VD2

VFB2

Linear

Regulator

Dynamic

Dropout

Control

LNB

OCP2

VUD

TONE

Bandgap

Reference

22kHz Tone Shape

VFB2

OTP

GND

VD1

VR1

Reference

Voltage

Copyright © 2015 Richtek Technology Corporation. All rights reserved.

www.richtek.com

2

is a registered trademark of Richtek Technology Corporation.

DS5047-00 March 2015

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