UR6516B

Preliminary

CMOS IC

UNISONIC TECHNOLOGIES CO., LTD

4 of 4

www.unisonic.com.tw

QW-R502-449.b

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FU N CT I ON AL DESCRI PT I ON

The UTC UR6516B is a low cost linear regulator, which can sink and source 2A of current without an external heat

sink.

The UTC UR6516B incorporates power MOSFETs that are capable of sourcing and sinking 2A of current while

keeping perfect voltage regulation. By using the external feedback, the output voltage can be regulated within 3% or

less. Separate voltage supply inputs have been added to fit applications with various power supplies for the databus

and power buses.

OUTPUTS

The VOUT pins (output voltage pins) are connected to the databus, address, or clock lines via an external inductor.

The output voltage varies depending on the input voltage.

INPUTS

The output voltage is determined by the input voltage. The desired output voltage could be programmable by two

external voltage divider resistors.

The VIN pin is suggested to connect to VDDQ of memory module for better tracking with memory VDDQ.

OTHER SUPPLY VOLTAGES

VCCA provide the voltage supply to the logic section and internal error amplifiers of UTC UR6516B.

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T Y PI CAL APPLI CAT I ON CI RCU I T

GND

NC

GND

GND

REFEN

U1

1

2

3

4

8

7

6

C3

4.7µF

CEin

200µF

CEout

200µF

C4

4.7µF

1

2

C2

104

R2

100K

Q1

EN

R1

100K

C1

104

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.