GU1084

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ISSUED DATE :2003/06/14

REVISED DATE :2006/03/29E

G

5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

Description

The GU1084 is a low dropout positive adjustable or fixed mode regulator with minimum of 5.0A output current

capability .The product is specifically designed to provide well regulated supply for low voltage IC applications

such as high speed bus termination and low current 3.3v logic supply. GU1084 is also well suited for other

applications such as VGA cards. GU1084 is guaranteed to have lower than 1.5V dropout at full load current

making it ideal to provide well regulated outputs of 1.25 to 3.3V with 4.7 to 12V input supply.

Features

&Built-in thermal shutdown

&Output current limiting

&Adjustable output voltage or fixed 1.5V,1.8V,2.5V,3.3V,5.0V

&Fast transient response

&Good noise rejection

Package Dimensions

Millimeter

Millimeter

REF.

Min.

Max.

REF.

Min.

Max.

A

4.40

4.80

c2

1.25

1.45

b

0.76

1.00

b2

1.17

1.47

L4

0.00

0.30 B D

8.6

9.0

c

0.36

0.5

e

2.54 REF.

L3

1.50 REF.

L

14.6

15.8

L1

2.29

2.79

0˚

8˚

E

9.80

10.4

L2

1.27 REF.

Typical Circuit

Block Diagram

Pin Descriptions

Name

I/O

PIN#

FUNCTION

Adj (GND)

1

Adjustable (Ground only for fixed mode)

Vout

O

2

The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to

ground to insure stability.

Vin

I

3

The input pin of regulator .Typically a large storage capacitor is connected from this pin to ground

to insure that the input voltage does not sag below the minimum dropout voltage during the load

transient response .This pin must always be 1.5V higher than Vout in order for the device to

regulate properly.