Diodes AP1121 User Manual

AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

Features

• 1.3V maximum dropout at full load current

• Fast transient response

• Output current limiting for each channel

• Built-in thermal shutdown for each channel

• Good noise rejection

• Dual output ch1 = 3.3V, ch2 = 2.5V

(ch2 = 1.8V for version B)

• SOP-8L: Available in “Green” Molding Compound (No Br, Sb)

Lead Free Finish/ RoHS Compliant (Note 1)

Applications

• PC peripheral

• Communication

Ordering Information

AP 1121 X S X - 13

General Description

AP1121 is a low dropout positive regulator which provides 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 3.3V/2.5V or

3.3V/1.8V logic supply. AP1121 is guaranteed to have <1.3V dropout at full load current making it ideal to provide well regulated outputs dual channels with up to 18V input supply.

Vout

A : CH1=3.3V

CH2=2.5V

Package

S : SOP-8L

Lead Free

L : Lead Free

G : Green

Packing

13 : Tape & Reel

B : CH1=3.3V

CH2=1.8V

Device

AP1121XSL-13

Lead-free

AP1121XSG-13

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be on found our website at http://www.diodes.com/datasheets/ap02001.pdf

Package

Code

S SOP-8L 2500/Tape & Reel -13 S SOP-8L 2500/Tape & Reel -13

Packaging

(Note 2)

.

Quantity Part Number Suffix

13” Tape and Reel

AP1121 Rev. 5 1 of 7 FEBRUARY 2009

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Pin Assignments

( Top View )

AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

V

OUT1

V

IN1

1

2

GND

8

GND

7

AP1121

3

V

IN2

OUT2

4

V

SOP-8L

6

GND

5

GND

Pin Descriptions

Pin Name Descriptions

GND Ground

3.3V(V

2.5V/1.8V (V

OUT2

OUT1

)

The output of the regulator. A minimum of 10uF c apacitor (0.15 Ω ≤ ESR ≤ 20Ω) must be

connected from this pin to ground to insure stability.

VIN

AP1121 Rev. 5 2 of 7 FEBRUARY 2009

The input pin of regulator. Typically a large storage capacitor (0.15Ω ≤ ESR ≤ 20Ω) is

connected from this pin to ground.

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Block Diagram

AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

2

V

IN1

Thermal

Shutdown

3

V

IN2

Thermal

Shutdown

Typical Application Circuit

1

V

OUT1

+

-

+

CURRENT

LIMIT

+

-

+

CURRENT

LIMIT

+

-

1.25V

-

1.25V

+

5/6

GND

4

V

OUT2

+

7/8

GND

3.3V/1A

C1

100uF

5V

C2

100uF

2.5V/1A C3

V

OUT1

IN1

IN2

OUT2

GND

GNDV GND

100uF

(3.3V/2.5V Dual output )

AP1121 Rev. 5 3 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

≤

θ

AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

Absolute Maximum Ratings

Symbol Parameter Rating Unit

VIN DC Supply Voltage -0.3 to 18 V V TST Storage Temperature -65 to +150 TOP Operating Junction Temperature Range 0 to +125

TM Maximum Junction Temperature 150

o

C

o

C

oC

Electrical Characteristics (Under Operating Conditions)

Parameter Conditions Min Typ. Max Unit

= 10mA, TA = 25oC,

I

AP1121_ - V

Output Voltage

AP1121A - V

AP1121B - V

Line Regulation IO = 10mA, V

OUT1

OUT2

+1.5V<VIN<12V, TA= 25oC 0.2 %

OUT

AP1121 series V

Load Regulation

Dropout Voltage

IN-VOUT

)

(V Current Limit (VIN-V Minimum Load Current

OUT1

AP1121 series V

OUT2

I

= 1A, ΔV

OUT

) = 5V 1. 1 A

OUT

o

0

C≤Tj≤125oC (Note 5)

OUT

= 0.1%V

Thermal Regulation TA = 25 oC, 30ms pulse 0.008 0.04 %/W Ripple Rejection F = 120Hz, C

OUT

Temperature Stability IO = 10mA 0.5 %

Thermal Resistance

JA

Junction-t o - A m bi ent (No heat sink; No air flow)

SOP-8L: Control Circuitry/Power Transistor (Note 6) CH1 or CH2 only CH1 & CH2 and PD1 = PD2 SOP-8L: Control Circuitry/Power Transistor

θ

Thermal Resistance

JC

Junction-to-Case

(Note 6) CH1 or CH2 only CH1 & CH2 and PD1 = PD2

Notes: 3. 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.

4. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input/output

5. Quiescent current is defined as the minimum output current that requires maintaining regulation. At 12V input/output diffe rential the device is

differentially and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.

guaranteed to regulate if the output current is greater than 10mA.

6. Vout1 and Vout2 are connected to the PCB copper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj, please connect to the large copper area >> 5.5mm*5.5mm (like 10mm*10mm).

AP1121 Rev. 5 4 of 7 FEBRUARY 2009

OUT

4.8V≤V I

OUT

4V I

OUT

4V≤V

V

IN

T

A

V

IN

T

A

≤12V

IN

= 10mA, TA = 25oC,

V

12V

IN

= 10mA, TA = 25oC,

≤12V

IN

= 5V, 0≤I

OUT

≤1A,

= 25oC (Note 3, 4)

= 4V, 0mA<Io<1A,

= 25oC (Note 4, 5)

OUT

3.235 3.300 3.365 V

2.450 2.500 2.550 V

1.764 1.800 1.836 V

26 33 mV 20 25 mV

1.3 1.4 V

5 10 mA

= 25uF Tantalu m , I

= 1A 60 70 dB

OUT

177

O

C/W

158

29

O

C/W

19

www.diodes.com © Diodes Incorporated

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

Typical Performance Characteristics

2. 0

1. 8

1. 6

1. 4

1. 2

1. 0

0. 8

0. 6

Dropout Voltage (V)

0. 4

0. 2 0

0

Dropout Voltage vs Output Current

Tj = 25 oC

250

500

Output Current (mA)

Tj = 125 oC

750

1000

0.20

0

I load=800mA

-0.20

-0.40

-0.80

Output Voltage Deviation (%)

- 1

-25 0

25 50 75 100 125

Temperature (oC)

Load Regulation vs Temperature

AP1121

2

1.5 1

0. 5 0

-0.5

- 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 Voltage Deviation (mV) Input Voltage (V)

Temperature (oC)

TIME (us )

Line Transient Response

1

0.8

0.6

0.4

0.2

Output Voltage Deviation (%)

0

24

30

C in = 1uF

20

C out = 10 uF Tantalum Preload = 100mA

10

0

-10

-20

Output Voltage Deviation (mV)

2 1 0

-1

Load Current (A)

010

20 30 40 50 60 70 80 90 100

Load Transient Response

681012

Input Voltage (V)

Line Regulation

TIME (us)

AP1121 Rev. 5 5 of 7 FEBRUARY 2009

Marking Information

(1) SOP-8L

AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

( Top View )

Logo

Part Number

Package Information

(1) Package type: SOP-8L

7°~9°

1.27typ

0.3/0.5

4.85/4.95

8

AP1121 X YY

3.85/3.95

5.90/6.10

0.15/0.25

1.30/1.50

1.75max.

WW X

0.10/0.20

Detail "A"

0.35max.

5

A : 3.3V/2.5V version B : 3.3V/1.8V version

: Year : 08, 09,10~

YY

X

WW : Week : 01~52; 52 represents 52 and 53 week

: Internal Code

X

L : Lead Free

41

0.254

0.62/0.82

7°~9°

45°

Gauge Plane

Seating Plane

Detail "A"

0°/8°

G : Green

8x-0.60

5.4

6x-1.27

8x-1.55

Land Pattern Recommendation

(Unit: mm)

AP1121 Rev. 5 6 of 7 FEBRUARY 2009

AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

IMPORTANT NOTICE

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages.

LIFE SUPPORT

Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.

AP1121 Rev. 5 7 of 7 FEBRUARY 2009