Diodes AP1122 User Manual

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

Description

AP1122 is a low dropout positive fixed-mode regulator with 1A 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 1.2V logic supply. AP1122 is also well suited for other applications such as VGA cards. AP1122 is guaranteed to have lower than 1.3V dropout at full load current making it ideal to provide well-regulated outputs of 1.2 output voltage with 2.5V input voltage supply.

Applications

• PC peripheral

• Communication

Features

• 1.3V maximum dropout at full load current

• Fixed 1.2V± 2% output voltage

• Fast transient response

• Output current limiting

• Built-in thermal shutdown

• Good noise rejection

• Packages: SOT223-3L, TO252-3L, SOT89-3L, TO263-3L and TO220-3L

• SOT89-3L, SOT223-3L and TO252-3L: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Pin Assignments

(Top View)

Tab is V

SOT223-3L

(Top View)

TO252-3L/ TO263-3L

(Top View)

Tab is V

SOT89-3L

( Top View)

3 2 1

OUT

3

2

1

Tab is V

3 2 1

OUT

V V

GND

V

IN

V

OUT

GND

IN

OUT

V

IN

V

OUT

GND

3 2 1

Tab is V

TO220-3L

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

AP1122

Document number: DS31012 Rev. 9 - 2

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

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OUT

V

IN

V

OUT

GND

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Typical Application Circuit

2.5V

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

C1

100uF

V

IN

V

OUT

1.2V/1A

C2

100uF

Tab is V

GND

OUT

Pin Descriptions

Pin Name I/O Pin # Description

GND I 1 Ground Pin

V

O 2

OUT

The output of the regulator. A minimum of 10uF capacitor (0.15Ω ≤ ESR ≤ 20Ω)

must be connected from this pin to ground to insure stability.

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

VIN I 3

this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response.

Functional Block Diagram

V

3

IN

2 V

OUT

Thermal

Shutdown

AP1122

Document number: DS31012 Rev. 9 - 2

+

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CURRENT

LIMIT

+

1.2V

+

GND

1

May 2010

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

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 Min Max Unit

I

Output Current - 1.0 A

OUT

TOP Operating Junction Temperature Range 0 125

Electrical Characteristics (Under Operating Conditions)

Parameter Test Conditions Min Typ. Max Unit

Output Voltage Line Regulation Load Regulation VIN=2.5V~12V, 10mA<Io<1A, TA=25oC (Note 2, 3) 1 %

Dropout Voltage (VIN-V

OUT

) Current Limit (VIN-V Minimum Load Current

(Note 4) Thermal Regulation TA=25oC, 30ms pulse 0.008 0.04 %/W Ripple Rejection F=120Hz,C Temperature Stability IO=10mA 0.5 %

θ

Thermal Resistance

JA

Junction-to-Ambient

θ

Thermal Resistance

JC

Junction-to-Case

Notes: 2. See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead

= 1/18” from the package.

3. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference between input and output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.

4. Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA.

5. Test conditions for SOT89-3L, TO252-3L, TO220-3L, and TO263-3L: Devices mounted on FR-4 substrate, single sided PC board, 2oz copper, with minimum recommended pad layout, no air flow.

6. Test condition for SOT223-3L: Device mounted on FR-4 substrate, single sided PC board, 2oz copper, with 5mmX5mm thermal pad layout, no air flow.

2.5V≦VIN≦12V, IO=10mA, TA=25oC

I

= 1A ,ΔV

OUT

o

0

C≦TJ≦125oC

OUT

= 1%V

OUT

) = 5V 1. 1 A

=25uF Tantalum, I

OUT

=1A, VIN=V

OUT

+3V 60 70 dB

OUT

SOT89-3L: Control Circuitry/Power Transistor (Note 5) SOT223-3L: Control Circuitry/Power Transistor (Note 6) TO252-3L: Control Circuitry/Power Transistor (Note 5) TO220-3L: Control Circuitry/Power Transistor (Note 5) TO263-3L: Control Circuitry/Power Transistor (Note 5)

1.176 1.2 1.224 V

0.2 %

1.3 V

5 10 mA

182 107

73 78 60

42 16 12

3.5

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o

C

o

C

o

C

o

C/W

o

C/W

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Typical Performance Characteristics

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

2. 0

1. 8

1. 6

1. 4

Dropout Voltage (V)

1. 2

1. 0

0. 8

0. 6

0. 4

0. 2 0

0

Tj = 25 oC

250

Output Current (mA)

500

Tj = 125 oC

Dropout Voltage vs Output Current

2

1.5

1

0. 5 0

-0.5

750

1000

0.20

-0.20

-0.40

-0.80

Output Voltage Deviation (%)

- 1

0

-25 0

I load=800mA

25 50 75 100 125

Temperature (oC)

Load Regulation vs Temperature

1

0.8

0.6

0.4

- 1

-1.5

Output Voltage Change (%)

- 2

-50 -25 0 25 50 75 100 125 150

Percent Change in Output Voltage vs Temperature

7.5 Cin=1uF Cout=10uF Tantalum

6.5

5.5

40

20

0

-20

-40

0 20 40 60 80 100 120 140 160 180 200

Output Volta ge Deviation (mV) Input Voltage (V)

Temperature (oC)

TIME (us)

Line Transient Response

AP1122

Document number: DS31012 Rev. 9 - 2

0.2

Output Voltage Deviation (%)

0

24

30 20

10

0

-10

-20

Output Voltage Dev i a tion (mV)

2 1 0

-1 010

Load Current (A)

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Input Voltage (V)

Line Regulation

C in = 1uF C out = 10 uF Tantalum Preload = 100mA

20 30 40 50 60 70 80 90 100

TIME (us)

Load Transient Response

May 2010

Ordering Information

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

Package

E : SOT223-3L D : TO252-3L

AP 1122 X

L : Lead Free (Note 7)

G : Green

X - X

Lead Free

Packing

U : Tube

13 : Tape & Reel

Y : SOT89-3L K : TO263-3L

T : TO220-3L

Device

AP1122EL-13 E SOT223-3L NA NA 2500/Tape & Reel -13 AP1122EG-13 E SOT223-3L NA NA 2500/Tape & Reel -13 AP1122DL-13 D TO252-3L NA NA 2500/Tape & Reel -13 AP1122DG-13 D TO252-3L NA NA 2500/Tape & Reel -13 AP1122YL-13 Y SOT89-3L NA NA 2500/Tape & Reel -13 AP1122YG-13 Y SOT89-3L NA NA 2500/Tape & Reel -13 AP1122KL-13 K TO263-3L NA NA 800/Tape & Reel -13 AP1122TL-U T TO220-3L 50 -U NA NA

Notes: 7. TO263-3L and TO220-3L are available in “Lead Free” products only.

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

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

Package

Code

Packaging

(Note 8)

Quantity

Tube 13” Tape and Reel

Part Number

Suffix

Quantity

Part Number

Suffix

AP1122

Document number: DS31012 Rev. 9 - 2

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Marking Information

(1) SOT223-3L

Logo

Part Number

( Top View )

Y W X

1 1 2 2

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

: Year : 0~9

Y

: Week : A~Z : 1~26 week;

W

a~z : 27~52 week; z repersents 52 and 53 week

X : Internal code

a~z : Lead Free A~Z : Green

(2) TO252-3L

(3) SOT89-3L

Logo

Part Number

Part Number Package Identification Code

( Top View )

1 1 2 2 YY WW X X

L : Lead Free

G : Green

: Year : 01~09

YY WW

: Week : 01~52, 52 represents

52 and 53 week

X : Internal Code

( Top View )

XX : Identification code

: Year : 0~9

X X Y W

X

Y

W

: Week : A~Z : 1~26 week;

a~z : 27~52 week;

z represents 52 and 53 week

1 32

X : Internal code

a~z : Lead Free

A~Z : Green

AP1122 SOT89-3L JB

AP1122

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Marking Information (Continued)

(4) TO263-3L

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

( Top View )

(5) TO220-3L

Logo

Part Number

Logo

Part Number

1 1 2 2 YY WW X X

( Top View )

1 1 2 2 YY WWX X

L : Lead Free

YY

: Year : 01~09

WW : Week : 01~52, 52 represents

52 and 53 week

X : Internal code

L : Lead Free

YY : Year : 01~09

: Week : 01~52, 52 represents

WW

52 and 53 week

X : Internal code

AP1122

Document number: DS31012 Rev. 9 - 2

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1A LOW DROPOUT POSITIVE REGULATOR

Package Outline Dimensions (All Dimensions in mm)

(1) SOT223-3L

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Package Outline Dimensions (Continued)

(2) TO252-3L

6.354/6.80 Typ 6.58

5.20/5.50 Typ 5.35

0.88/1.27

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

5.6

(3) SOT89-3L

0.61 Typ

2.28

BSC.

4.57 BSC.

1.40/1.75 Typ 1.60

5.40/6.20

0.64/1.02 Typ 0.83

0.45/0.58 Typ 0.52

11.0

Typ 5.57

2.0

Land Pattern Recommendation (Unit: mm)

0.89/

1.14

9.00/10.40 Typ 9. 70

0.51

SEE NOTE2

2.25

SEATING

PLANE

1.7

7.2

1.2

2.18/2.40 Typ 2.29

0.45/0.58 Typ 0.52

2.7

1.45/1.55 Typ 1.50

80(2x)

0.36/0.48 Typ 0.42

AP1122

Document number: DS31012 Rev. 9 - 2

2.90/3.10 Typ 3.00

4.40/4.60 Typ 4.50

0.41/0.53 Typ 0.47

0.36/0.48 Typ 0.42

3.94/4.25

2.35/2.60 Typ 2.48

1.20

0.80/

Land Pattern Recommendation (Unit: mm)

Typ 1.50

1.40/1.60

0.35/0.43 Typ 0.39

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0.9

0.4

50(2x)

1.5

1.9

1.3

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Package Outline Dimensions (Continued)

(4) TO263-3L

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

TO220-3L

(5)

9.65/10.29 Typ 9.97

2.54

BSC.

2.54/3.43 Typ 2.98

2.92 Typ 1.30

8.65/9.65 Typ 9.15

14.61/15.88 Typ 15.24

Typ

1.78

1.52

1.27/

0.51/0.99 Typ 0.75

1.14/1.40 Typ1.27

2.28/2.80 Typ 2.54

9.70/10.70 Typ 10.20

10.9

9.1

3.55/4.85 Typ 4.20

2.54

0.51/1.40 Typ 0.95

1.3

Land Pattern Recommendation (Unit: mm)

0.38 Typ

Ø3.53/4.09

Typ 3.81

15.7

3

Typ 4.45

4.06/4.83

Typ 1.27

1.14/1.40

AP1122

Document number: DS31012 Rev. 9 - 2

Typ 15.35

14.20/16.50

1.14/1.78 Typ 1.46

4.83/5.33 Typ 5.08

5.84/6.86 Typ 6.35

3.66/6.35 Typ 5.00

Typ 13.72

12.72/14.72

0.51/1.14 Typ 0.83

2.99/2.79 Typ 2.54

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0.31/1.14 Typ 0.72

2.03/2.92 Typ2.48

SEATING PLANE

May 2010

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes In corporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this documen t or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign p atents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonabl y expected

to cause the failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

www.diodes.com

AP1122

Document number: DS31012 Rev. 9 - 2

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Diodes AP1122 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual