RT5047A View Datasheet(PDF) - Richtek Technology
Part Name
Description
Manufacturer
RT5047A Datasheet PDF : 16 Pages
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RT5047A
Marking Informaton
RT5047A
GSPYMDNN
RT5047AGSP : 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
FAULT
Fault Detection Pin. Pull to 3.3V by 4.7k resistor.
8
TONE
22kHz TONE Input.
9 (Exposed Pad) GND
Ground. The Exposed Pad must be soldered to a large PCB and connected
to GND for maximum power dissipation.
Function Block Diagram
VIN
UVLO
LX
OCP1
VR1
Error
VFB1 Amp
PWM
Controller
BOOST
RF1
RF2
EN
OSC
Oscillator
SEL
2-steps
Voltage
Setting
VD2
Linear
Regulator
OCP2
Logic
Dynamic
Dropout
Control
VUD
LNB
TONE
Bandgap
Reference
22kHz Tone Shape
VFB2
OTP
GND
VD1
VR1
Reference
Voltage
FAULT
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS5047A-00 March 2015
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