Diodes AP1084 User Manual

AP1084

5A LOW DROPOUT POSITIVE ADJUSTABLE OR

FIXED-MODE REGULATOR

Features

• 1.4V Maximum Dropout at Full Load Current

• 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

• Lead Free Packages: TO252-3L, TO263-3L and

TO220-3L

• TO252-3L, TO263-3L and TO220-3L: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish/RoHS Compliant (Note 1)

Typical Application Circuit

5.0V to 3.3V Fixed Mode Regulator

5V

V

C1

100uF

in

General Description

AP1084 is a low dropout positive adjustable or fixed-mode regulator with 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. AP1084 is also well suited for other applications such as VGA cards. AP1084 is guaranteed to have lower than 1.4V 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.

Adjustable Regulator

5V

V

C1

100uF

in

2.5V/5A

C2 100uF

Tab is V

V

out

GND

out

C2

100uF

3.3V/5A

Tab is V

Note:

V

out

Adj

out

121 121

(1 V

Ω

R

2

)

+∗=

R

1

R1 R2

V

REF

O

AP1084 Rev. 9 1 of 11 JANUARY 2010 DS31070 www.diodes.com © Diodes Incorporated

Ordering Information

5A LOW DROPOUT POSITIVE ADJUSTABLE OR

AP1084 X XX X - X

AP1084

FIXED-MODE REGULATOR

Package Vout

D : TO252-3L

Blank = Adj K : TO263-3L T : TO220-3L

15 = 1.5V 18 = 1.8V

Lead Free

L : Lead Free

G : Green

Packing

U : Tube

13 : Tape & Reel

25 = 2.5V 33 = 3.3V 50 = 5.0V

Device

AP1084DXXL-13 D TO252-3L NA NA 2500/Tape & Reel -13 AP1084DXXG-13 D TO252-3L NA NA 2500/Tape & Reel -13 AP1084KXXL-13 K TO263-3L NA NA 800/Tape & Reel -13 AP1084KXXG-13 K TO263-3L NA NA 800/Tape & Reel -13 AP1084TXXL-U T TO220-3L 50 -U NA NA AP1084TXXG-U T TO220-3L 50 -U NA NA

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/datasheets/ap02001.pdf.

http://www.diodes.com/products/lead_free.html.

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

Package

Code

Packaging

(Note 2)

Quantity

Tube 13” Tape and Reel

Part Number

Suffix

Quantity

Part Number

Suffix

AP1084 Rev. 9 2 of 11 JANUARY 2010 DS31070 www.diodes.com © Diodes Incorporated

5A LOW DROPOUT POSITIVE ADJUSTABLE OR

Pin Assignment

(1) TO252-3L (2) TO263-3L

( Top View )

3

2

V

IN

V

OUT

AP1084

FIXED-MODE REGULATOR

( Top View )

3

2

V

IN

V

OUT

1

Tab is V

(3) TO220-3L

OUT

Adj (GND)

( Top View)

3 2

1

Tab is V

OUT

V

IN

V

OUT

Adj (GND)

Pin Description

Pin Name I/O Pin # Description

Adjustable (Ground only for fixed mode)

Adj (GND) I 1

A resistor divider from this pin to the V (Ground only for Fixed-Mode).

pin and ground sets the output voltage

OUT

1

Tab is V

OUT

Adj (GND)

V

O 2

OUT

VIN I 3

The output of the regulator. A m inimum of 10uF (0.15Ω ≤ ESR ≤ 20Ω) capacitor must be connected from this pin to ground to insure stability.

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 1.4V (1.3V) higher than V

in order for the device to regulate properly.

OUT

Block Diagram

AP1084

5A LOW DROPOUT POSITIVE ADJUSTABLE OR

FIXED-MODE REGULATOR

3

V

in

2

V

out

+

-

+

1.25V

+

CURRENT

LIMIT

+

Thermal

Shutdown

-

1

Adj

Absolute Maximum Ratings

Symbol Parameter Rating Unit

VIN DC Supply Voltage -0.3 to 12 V TST Storage Temperature -65 to +150

TMJ Maximum Junction Temperature 150

Recommended Operating Conditions

Symbol Parameter

TOP Operating Junction Temperature Range

Min Max

0 125

o

C

oC

Unit

oC