Diodes AZ317 User Manual

Data Sheet

3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR AZ317

General Description

The AZ317 is an adjustable three-terminal positive
voltage regulator with a very low dropout of 1.2V at
1A output current. Using 2 external resistors, the
AZ317 can provide an adjustable output voltage down
to 1.25V.

The AZ317 includes a circuit of trimmed bandgap ref­erence to assure output voltage accuracy to be within
1%. It also provides current limiting and thermal shut­down. The current limit is trimmed to ensure specified
output current and controlled short-circuit current. The
On-chip thermal limiting provides protection against
any combination of overload and ambient temperature
that would create excessive junction temperature.

The AZ317 is available in the standard SOT-223, TO­220-3, TO-252-2 (1), TO-252-2 (3) and TO-263-3
power packages.

Features

· Typical 1% Output Voltage Tolerance

· Typical 0.01%/V Line Regulation

· Typical 0.2% Load Regulation

· Very Low Dropout Voltage: 1.2V at 1A Output

Current

· Trimmed Current Limit

· On-chip Thermal Protection

o

· Operation Junction Temperature: 0 to 125

C

Applications

· PC Motherboard

· LCD Monitor

· Graphic Card

· DVD Player

· Network Interface Card/Switch

· Telecom Equipment

· Printer and other Peripheral Equipment

SOT-223

TO-252-2 (1)

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TO-252-2 (3)

Figure 1. Package Types of AZ317

TO-220-3

TO-263-3

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Data Sheet

Thermal

Shutdown

+

+

_

Current

Limiter

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR AZ317

Pin Configuration

H Package

(SOT-223)

V

OUT

D Package

(TO-252-2(1))

V

OUT

T Package

(TO-220-3)

INPUT

OUTPUT

ADJ

V

OUT

(TO-252-2(3))

INPUT

OUTPUT

ADJ

Figure 2. Pin Configuration of AZ317 (Top View)

INPUT

OUTPUT

ADJ

INPUT

OUTPUT

ADJ

S Package

(TO-263-3)

INPUT

OUTPUT

ADJ

Functional Block Diagram

3

INPUT

2

OUTPUT

1

ADJ

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Figure 3. Functional Block Diagram of AZ317

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Data Sheet

3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR AZ317

Ordering Information

AZ317 -

Circuit Type

E1: Lead Free
G1: Green

Package

H: SOT-223

TR: Tape and Reel
Blank: Tube

T: TO-220-3

D: TO-252-2 (1)

/TO-252-2 (3)

S: TO-263-3

Package

SOT-223

TO-220-3

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

TO-263-3

Temperature

Range

0 to

125oC

0 to

125oC

125oC

0 to

125oC

0 to

Lead Free Green Lead Free Green

AZ317HTR-E1 AZ317HTR-G1 EH31A GH31A Tape & Reel

AZ317T-E1 AZ317T-G1 AZ317T-E1 AZ317T-G1 Tube

AZ317DTR-E1 AZ317DTR-G1 AZ317D-E1 AZ317D-G1 Tape & Reel

AZ317S-E1 AZ317S-G1 AZ317S-E1 AZ317S-G1 Tube

AZ317STR-E1 AZ317STR-G1 AZ317S-E1 AZ317S-G1 Tape & Reel

Part Number Marking ID

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.

Packing

Typ e

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Data Sheet

3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR AZ317

Absolute Maximum Ratings (Note 1)

Parameter Symbol Min Max Unit

Input Voltage V

Maximum Junction Temperature T

Storage Temperature T

Lead Temperature (Soldering, 10sec) T

LEAD

IN

J

S

150

-65 150

20 V

300

o

C

o

C

o

C

ESD (Human Body Model) ESD 4000 V

Note1: 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 V

Operating Junction Temperature Range T

IN

J

V

+2 15 V

OUT

0 125

o

C

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Data Sheet

3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR AZ317

Electrical Characteristics

(Typicals and limits apply for TJ =25oC, P≤ Maximum Power Dissipation unless otherwise specified.)(Note 2)

Parameter Symbol Conditions Min Typ Max Unit

Reference Voltage V

Line Regulation S

REF

V

Load Regulation Si V

10mA≤I

3V≤ (V

I

OUT

-V

IN

≤1A,

OUT

IN-VOUT

) ≤10V

≤ 20mA, 3V≤VIN-V

= 2V, 10mA≤I

OUT

≤10V 0.01 0.04 %/V

OUT

≤1A 0.2 0.4 %

OUT

Thermal Regulation 20ms Pulse 0.04 0.07 %/W

Dropout Voltage ΔV I

Current Limit I

LIMIT

= 1A 1.2 1.3 V

OUT

(VIN-V

) = 2V 1.2 1.5 1.8 A

OUT

Adjust Pin Current 50 100 μA

Adjust Pin Current Change 1.4V≤(V

10mA ≤I

Minimum Load Current 3V≤ (V

IN-VOUT

OUT

IN-VOUT

Ripple Rejection f =120Hz, C

(V

IN-VOUT

) ≤ 10V,

≤1A

) ≤ 15V 3.5 10 mA

=1μF Tantalum,

OUT

) = 3V, I

OUT

=1A

Temperature Stability 1%

Long -Term Stability

RMS Output Noise (% of V

Thermal Resistance,
Junction to Case

OUT

)

T

=125oC, 1000hrs

A

=25oC, 10Hz ≤ f ≤ 10kHz

T

A

SOT-223
TO-252-2 (1)/(3)
TO-220
TO-263

Thermal Shutdown Junction Temperature 150

Thermal Shutdown Hysteresis 25

1.20 1.25 1.30 V

0.2 5 μA

60 75 dB

0.3 %

0.003 %

15

o

C/W

10

4.5
4

o

o

C

C

Note 2: Maximum Power Dissipation is Package Type and Case Temperature dependent. Please see Figure 12.

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