Diodes AZ2940 User Manual

Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

General Description

The AZ2940 is a low dropout three-terminal regulator
with a typical dropout of 280mV at 1A output current.

The AZ2940 provides current limit and thermal shut­down. On-chip thermal shutdown provides protection
against any combination of high current and ambient
temperature that would create excessive junction tem­peratures.

The AZ2940 has 1.2V, 1.8V, 2.5V, 3.3V and 5.0V ver­sions.

The AZ2940 series is available in the industry standard
TO-220-3, TO-263-3, TO-252-2 (1), TO-252-2 (3) and
SOT-223 power packages. (Detailed information
please refer to page 4)

Features

· Minimum Guaranteed Output Current: 1A

· Dropout Voltage at I

(Except 1.2V and 1.8V Versions)

· Output Accuracy:

· Low Ground Current

· Internal Current Limit and Thermal Protection

· Reversed-battery and Reversed-lead Insertion

Protection

· Fast Transient Response

± 1%

=1A: 280mV Typ.

OUT

Applications

· LCD TV

· Set Top Box

· LCD Monitor

· SMPS Post Regulator

· Laptop, Palmtop and Notebook

· Portable Instrumentation

· USB Power Supply

TO-220-3 TO-263-3

TO-252-2 (1)

Figure 1. Package Types of AZ2940

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TO-252-2 (3)

SOT-223

Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Pin Configuration

T Package
(TO-220-3)

3

2

1

(TO-252-2 (1))

3

2

1

V

OUT

GND

V

IN

V

OUT

GND

V

IN

D Package

S Package

(TO-263-3)

3

2

1

(TO-252-2 (3))

3

2

1

V

OUT

GND

V

IN

V

OUT

GND

V

IN

H Package

(SOT-223)

3

2

1

V

GND

V

OUT

IN

Figure 2. Pin Configuration of AZ2940 (Top View)

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Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Pin Description

Pin Number Pin Name Function

1V

2 GND Ground pin. This pin and TAB are internally connected

3V

Functional Block Diagram

1

V

IN

IN

OUT

Reference +

Unregulated Input

Regulated Output

1.24V

-

16V

3

V

OUT

Thermal

Shutdown

2

GND

Figure 3. Functional Block Diagram of AZ2940

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Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Ordering Information

-

AZ2940

Package

TO-220-3

TO-263-3

TO-252-2 (1)

/TO-252-2 (3)

SOT-223

Circuit Type

Package

T: TO-220-3
S: TO-263-3
D: TO-252-2 (1)/TO-252-2 (3)
H: SOT-223

Temperature

Range

-40 to 125

-40 to 125oC

-40 to 125

-40 to 125

o

C

o

C

o

C

Lead Free Green Lead Free Green

AZ2940T-3.3E1 AZ2940T-3.3G1 AZ2940T-3.3E1 AZ2940T-3.3G1 Tube

AZ2940T-5.0E1 AZ2940T-5.0G1 AZ2940T-5.0E1 AZ2940T-5.0G1 Tube

AZ2940S-3.3E1 AZ2940S-3.3G1 AZ2940S-3.3E1 AZ2940S-3.3G1 Tube

AZ2940S-3.3TRE1 AZ2940S-3.3TRG1 AZ2940S-3.3E1 AZ2940S-3.3G1 Tape & Reel

AZ2940S-5.0E1 AZ2940S-5.0G1 AZ2940S-5.0E1 AZ2940S-5.0G1 Tube

AZ2940S-5.0TRE1 AZ2940S-5.0TRG1 AZ2940S-5.0E1 AZ2940S-5.0G1 Tape & Reel

AZ2940D-1.8E1 AZ2940D-1.8G1 AZ2940D-1.8E1 AZ2940D-1.8G1 Tube

AZ2940D-1.8TRE1 AZ2940D-1.8TRG1 AZ2940D-1.8E1 AZ2940D-1.8G1 Tape & Reel

AZ2940D-2.5E1 AZ2940D-2.5G1 AZ2940D-2.5E1 AZ2940D-2.5G1 Tube

AZ2940D-2.5TRE1 AZ2940D-2.5TRG1 AZ2940D-2.5E1 AZ2940D-2.5G1 Tape & Reel

AZ2940D-3.3E1 AZ2940D-3.3G1 AZ2940D-3.3E1 AZ2940D-3.3G1 Tube

AZ2940D-3.3TRE1 AZ2940D-3.3TRG1 AZ2940D-3.3E1 AZ2940D-3.3G1 Tape & Reel

AZ2940D-5.0E1 AZ2940D-5.0G1 AZ2940D-5.0E1 AZ2940D-5.0G1 Tube

AZ2940D-5.0TRE1 AZ2940D-5.0TRG1 AZ2940D-5.0E1 AZ2940D-5.0G1 Tape & Reel

E1: Lead Free
G1: Green

TR: Tape and Reel
Blank: Tube

1.2: Fixed Output 1.2V

1.8: Fixed Output 1.8V

2.5: Fixed Output 2.5V

3.3: Fixed Output 3.3V

5.0: Fixed Output 5.0V

Part Number Marking ID

AZ2940D-1.2G1 AZ2940D-1.2G1 Tube

AZ2940D-1.2TRG1 AZ2940D-1.2G1 Tape & Reel

AZ2940H-1.2TRG1 GH12B Tape & Reel

AZ2940H-1.8TRG1 GH12F Tape & Reel

AZ2940H-2.5TRG1 GH12G Tape & Reel

AZ2940H-3.3TRG1 GH12H Tape & Reel

AZ2940H-5.0TRG1 GH12J Tape & Reel

Packing

Typ e

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.

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Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Absolute Maximum Ratings (Note 1)

Parameter Symbol

Input Voltage V

Operating Junction Temperature T

Storage Temperature Range T

Lead Temperature (Soldering, 10sec) T

IN

J

STG

LEAD

Va lu e

16 V

150

-65 to 150

260

Unit

o

C

o

C

o

C

TO-220-3 60

Thermal Resistance

θ

JA

TO-263-3 60

o

C/W

TO-252-2 (1)/TO-252-2 (3) 100

SOT-223 120

ESD (Human Body Model) ESD 5000 V

ESD (Machine Model) ESD 300 V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Max­imum Ratings" for extended periods may affect device reliability.

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage

Operating Junction Temperature

VIN

T

2.5 13.2 V

J

-40 125

o

C

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Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Electrical Characteristics

AZ2940-1.2 Electrical Characteristics

Operating Conditions: V

The Boldface applies over -40

Parameter Symbol Condition Min Typ Max Unit

Output Voltage

Line Regulation V

Load Regulation V

Output Voltage
Temperature Coefficient

Ground Current

Short Circuit Current I

Minimum Load Current I

Output Noise Voltage (rms) 10Hz to 100KHz, I

Thermal Resistance

=2.5V, I

IN

o

C≤TJ≤125oC.

V

∆V

I

LOAD (MIN)

OUT

OUT

RLINE

RLOAD

/∆TI

OUT

GND

SC

θ

JC

=10mA, CIN=10µF, C

I

=10mA 1.188 1.2 1.212 V

OUT

10mA≤I

I

OUT

VIN=2.5V, 10mA≤I

OUT

VIN=2.5V

V

OUT

C

OUT

≤1A, 2.5V≤VIN≤13.2V 1.176 1.2 1.224 V

OUT

=10mA, 2.5V≤VIN≤13.2V 3.6 18 mV

=10mA 180

I

OUT

I

OUT

=0V (Note 2) 1.5 2.2 A

=10µF

=10µF, TJ=25oC, unless otherwise specified.

OUT

≤1A 5.4 27 mV

OUT

=750mA 12 25 mA

=1A 18 mA

=100mA,

OUT

TO-252-2 (1)/TO-252-2 (3) 7.8

SOT-223 29.7

µV/

15mA

400 µV

o

C/W

o

C

Note 2: VIN=V

OUT(NOMINAL)

+1V.

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Data Sheet

1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Electrical Characteristics

AZ2940-1.8 Electrical Characteristics

Operating Conditions: V

The Boldface applies over -40

Parameter Symbol Condition Min Typ Max Unit

Output Voltage

Line Regulation V

Load Regulation V

Output Voltage
Temperature Coefficient

Dropout Voltage (Note 3)

Ground Current

Short Circuit Current I

Minimum Load Current I

Output Noise Voltage (rms) 10Hz to 100KHz, I

Thermal Resistance

=2.8V, I

IN

o

C≤TJ≤125oC.

V

∆V

V

I

LOAD (MIN)

OUT

OUT

RLINE

RLOAD

/∆TI

OUT

DROP

GND

SC

θ

JC

=10mA, CIN=10µF, C

I

=10mA 1.782 1.8 1.818 V

OUT

10mA≤I

I

OUT

VIN=2.8V, 10mA≤I

OUT

∆V

OUT

VIN=2.8V

V

OUT

C

OUT

≤1A, 2.8V≤VIN≤13.2V 1.764 1.8 1.836 V

OUT

=10mA, 2.8V≤VIN≤13.2V 3.6 18 mV

=10mA 36 180

I

=1%

I

I

I

OUT

OUT

OUT

OUT

=0V (Note 2) 1.5 2.2 A

=10µF

=10µF, TJ=25oC, unless otherwise specified.

OUT

≤1A 5.4 27 mV

OUT

=100mA 290 500 mV

=1A 330 750 mV

=750mA 12 25 mA

=1A 18 mA

=100mA,

OUT

TO-252-2 (1)/TO-252-2 (3) 7.8

SOT-223 29.7

15mA

400 µV

µV/

o

C/W

o

C

Note 2: VIN=V

OUT(NOMINAL)

+1V.

Note 3: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value

which is measured at V

+1V applied to VIN. In application, VIN should be no less than 2.5V.

OUT

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