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RT5047A

Single Output LNB Supply and Control Voltage Regulator

Richtek Technology 

RT5047A

Absolute Maximum Ratings (Note 1)

 Supply Input Voltage, VIN-------------------------------------------------------------------------------------------0.3V to 30V

 Output Voltage LNB, LX and BOOST Pins ---------------------------------------------------------------------0.3V to 30V

 Others Pin to GND ----------------------------------------------------------------------------------------------------0.3V to 6V

 Power Dissipation, PD @ TA = 25C

SOP-8 (Exposed pad)------------------------------------------------------------------------------------------------3.44W

 Package Thermal Resistance (Note 2)

SOP-8 (Exposed pad), JA------------------------------------------------------------------------------------------29C/W

SOP-8 (Exposed pad), JC------------------------------------------------------------------------------------------2C/W

 Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------260C

 Junction Temperature ------------------------------------------------------------------------------------------------150C

 Storage Temperature Range ---------------------------------------------------------------------------------------65C to 150C

Recommended Operating Conditions (Note 3)

 Supply Input Voltage -------------------------------------------------------------------------------------------------8V to 16V

 Ambient Temperature Range---------------------------------------------------------------------------------------40C to 85C

 Junction Temperature Range --------------------------------------------------------------------------------------40C to 125C

Electrical Characteristics

(VIN (typ.) = 12V, VIN = 8V to 16V, TA = 25C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

General

LNB Output Accuracy,

Load and Line Regulation

ERR

Relative to selected VLNB target level,

ILNB = 0 to 450mA

-3

--

3

%

IIN_OFF

EN = 0, LNB output disabled

-- 0.3 0.5 mA

Supply Current

IIN_ON

Boost Switch On

Resistance

Switching Frequency

Switch Current Limit

Linear Regulator Voltage

Drop

IIN_ON

RDS(ON)

fSW

ILIMSW

VDROP

Output Voltage Rise Time TR_LNB

Output Voltage Pull-Down

Time

TF_LNB

Ripple and Noise on LNB

Output

VRIP_PP

EN = 1, VLNB = 18.3V, Tone = 0V

EN = 1, VLNB = 18.3V, 22kHz TONE

Input

ILNB = 450mA

VIN = 10V, VLNB = 20.5V

VBOOST-VLNB, ILNB = 450mA

For VLNB = 13.3V18.3V,

CLNB = 100nF, ILNB = 450mA

For VLNB = 18.3V13.3V,

CLNB = 100nF, ILNB = 0mA

20MHz Bandwidth Limit (GBD)

--

10 18 mA

--

16 28 mA

-- 150 300 m

600 700 800 kHz

--

3

--

A

-- 0.85 --

V

--

3

10 ms

--

3

10 ms

--

20

-- mVPP

Copyright © 2015 Richtek Technology Corporation. All rights reserved.

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DS5047A-00 March 2015

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