Diodes AS78XXA User Manual

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Description

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S78XXA

1A 3-TERMINAL POSITIVE VOLTAGE REGULATOR

Features

The AS78XXA series are three terminal positive voltage regulators

designed for a wide variety of applications including local, on-card

regulation.

The AS78XXA are complete with internal current limiting, thermal

shutdown protection, and safe-area compensation which make them

virtually immune from output overload. If adequate heat sinking is

provided, these regulators can deliver output currents up to 1A.

The AS78XXA are available in TO-252-2 (3), TO-252-2 (4), TO-252-2

(5), TO-220-3 and TO-220F-3 packages.

Applications

 High Efficiency Linear Regulator

 Post Regulation for Switching Supply

 Microprocessor Power Supply

 Mother Board

Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

4. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

 Output Current up to 1A

 Fixed Output Voltages of 5V, 6V, 8V, 9V, 12V, 15V and 18V

 Output Voltage Accuracy of ±4% over the Full Temperature

Range

 Internal Short Circuit Current Limiting

 Internal Thermal Overload Protection

 Output Transistor Safe-area Protection

 Low Load Regulation

 Stable Performance in High Temperature

 TO-220-3 and TO-220F-3

 Lead-Free Finish; RoHS Compliant (Notes 1 & 2)

 Lead-Free Packages: TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)

 Totally Lead-Free; RoHS Compliant (Notes 4 & 2)

 Available in “Green” Packages: TO-220-3 and TO-220F-3

 Lead-Free Finish; RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

 Lead-Free Packages, Available in “Green” Molding Compound:

TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)

 Totally Lead-Free & Fully RoHS Compliant (Notes 4 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

T Package T Package

(TO-220-3) (Option 1) (TO-220-3) (Option 2)

T Package TF Package

(TO-220-3) (Option 3) (TO-220F-3)

AS78XXA

Document number: DS36562 Rev. 3 - 2

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2

1

OUTPUT

GND

INPUT

3

2

1

OUTPUT

GND

INPUT

3

2

1

OUTPUT

GND

INPUT

3

2

1

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OUTPUT

GND

INPUT

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S78XXA

Pin Assignments

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

(Cont.)

D Package

3

2

OUTPUT

GND

3

2

1

INPUT

1

(TO-252-2 (4)) (TO-252-2 (5))

3

OUTPUT

2

GND

1

INPUT

3

2

1

OUTPUT

GND

INPUT

OUTPUT

GND

INPUT

Typical Applications Circuit

V

IN

AS78XXA

1

INPUT OUTPUT

GND 2

Pin Descriptions

Pin Number Pin Name Function

1 INPUT Voltage Input

2 GND Ground

3 OUTPUT Voltage Output

3

V

OUT

0.1F0. 33F

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S78XXA

Functional Block Diagram

R1

Q3

Q1 Q4

Q2

Q5

Q6

R3

R4

R5

1

INPUT

Q8

R9

Q9

Q10

Q11

Q7

R7

R6

Q13

Q14

Q21

C1

Q18

R12

Q22

Q16

R14

R11

R15

Q15

C2

R16

Q23

D1

Zener

R17

R18

R19

R20

R21

R2

2

Q24

R23

3

OUTPU T

Q19

Q12

R2

R8 R10

Q17

R13

Q20

2

GND

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Absolute Maximum Ratings

(Note 5)

Symbol Parameter

VIN

T

LEAD

P

D

T

J

T

STG



JA

ESD ESD (Human Body Model) 6000 V

ESD ESD (Machine Model) 500 V

Note 5: 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.

Input Voltage 36 V

Lead Temperature (Soldering, 10sec) +260 °C

Power Dissipation Internally Limited W

Operating Junction Temperature +150 °C

Storage Temperature Range -65 to +150 °C

TO-220-3 60

Thermal Resistance

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

(4)/TO-252-2 (5)

TO-220F-3 60

Rating

100

Recommended Operating Conditions

Unit

°C/W

Symbol Parameter Min Max Unit

AS7805A – 25

AS7806A – 26

AS7808A – 28

VIN

T

Input Voltage

J

Operating Junction Temperature Range -40 +125 °C

AS7809A – 29

AS7812A – 32

AS7815A – 32

AS7818A – 32

V

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S78XXA

Electrical Characteristics AS7805A

(@ VIN = 10V, I

= 1A, TJ = -40 to +125°C, unless otherwise specified.)

OUT

Symbol Parameter Conditions Min Typ Max Unit

T

V

RLINE

V

RLOAD

△I

OUT

I

Q

Output Voltage

Line Regulation

Load Regulation

Quiescent Current

Quiescent Current Change

PSRR Ripple Rejection

V

DROP

N

O

Dropout Voltage

Output Noise Voltage

= +25°C

J

I

= 5mA to 1A, VIN = 7.5V to

OUT

20V, P

≤15W

D

V

= 7.5V to 20V,

IN

= 500mA, TJ = +25°C

I

OUT

V

= 10V, I

IN

= 5mA to 1A, TJ =

OUT

+25°C

V

= 10V, I

IN

V

= 8V to 25V, I

IN

OUT

= 0

OUT

= 500mA, TJ

= +25°C

I

= 5mA to 1A, TJ = +25°C

OUT

= 8V to 18V, f = 120Hz, I

V

IN

500mA △ V

= 1%, I

OUT

= 1A, TJ =

OUT

+25°C

f = 10Hz to 100kHz, T

= +25°C

A

OUT

4.9 5 5.1

4.8 – 5.2

–

25 50

– 20 50 mV

– 3.2 6 mA

– 0.3 0.8

– 0.08 0.5

=

– 70 – dB

– 2 – V

– 10 –

V

mV

mA

µV/V

O

△V

(△V

R

O

I

SC

IPK

/△T

OUT

OUT/VOUT

△T

Output Resistance

Short Circuit Current

Peak Output Current

Output Voltage Temperature

)/

Coefficient

f = 1kHz

= 35V, TA = +25°C

V

IN

VIN = 10V, TJ = +25°C

– 10 –

– 0.05 – A

– 2.2 – A

– – 0.4 –

– – 80 –

mΩ

mV/°C

ppm/°C

TO-220-3 – 9 –

TO-252-2 (3)/

θ

JC

Thermal Resistance

TO-252-2 (4)/

– 16 –

°C/W

TO-252-2 (5)

TO-220F-3 – 9 –

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S78XXA

Electrical Characteristics AS7806A

(@ VIN = 11V, I

OUT

(Cont.)

= 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

T

V

RLINE

V

RLOAD

△I

OUT

I

Q

Output Voltage

Line Regulation

Load Regulation

Quiescent Current

Quiescent Current Change

PSRR Ripple Rejection

V

DROP

N

O

R

O

I

SC

Dropout Voltage

Output Noise Voltage

Output Resistance

Short Circuit Current

= +25°C

J

I

= 5mA to 1A, VIN = 8.6V to

OUT

21V, P

≤15W

D

V

= 8.6V to 21V,

IN

= 500mA, TJ = +25°C

I

OUT

V

= 11V, I

IN

= 5mA to 1A, TJ =

OUT

+25°C

V

= 11V, I

IN

V

= 8.6V to 21V, I

IN

= +25°C

T

J

I

= 5mA to 1A, TJ = +25°C

OUT

= 9.5V to 19.5V, f = 120Hz,

V

IN

I

= 500mA

OUT

△ V

OUT

= 0

OUT

= 1%, I

= 500mA,

OUT

= 1A, TJ =

OUT

+25°C

f = 10Hz to 100kHz, T

= 25°C

A

f = 1kHz

= 35V, TA = +25°C

V

IN

5.88 6 6.12

V

5.76 – 6.24

–

25 60

mV

– 20 60 mV

– 3.2 6 mA

– 0.3 0.8

mA

– 0.08 0.5

– 65 – dB

– 2 – V

– 10 –

µV/V

mΩ

O

– 0.2 – A

△V

(△V

IPK

/△T

OUT

OUT/VOUT

△T

Peak Output Current

Output Voltage Temperature

)/

Coefficient

VIN = 11V, TJ = +25°C

– – 0.5 –

– – 80 –

– 2.2 – A

mV/°C

ppm/°C

TO-220-3 – 9 –

TO-252-2 (3)/

θ

JC

Thermal Resistance

TO-252-2 (4)/

– 16 –

°C/W

TO-252-2 (5)

TO-220F-3 – 9 –

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Electrical Characteristics AS7808A

(@VIN = 14V, I

OUT

(Cont.)

= 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

= +25°C

V

RLINE

V

RLOAD

△I

OUT

I

Q

Output Voltage

Line Regulation

Load Regulation

Quiescent Current

Quiescent Current Change

PSRR Ripple Rejection

V

DROP

N

O

R

O

Dropout Voltage

Output Noise Voltage

Output Resistance

T

J

I

= 5mA to 1A, VIN = 10.6V to

OUT

23V, P

≤15W

D

V

= 10.6V to 23V,

IN

= 500mA, TJ = +25°C

I

OUT

= 14V, I

V

IN

= 5mA to 1A, TJ =

OUT

+25°C

V

= 14V, I

IN

= 10.6V to 23V, I

V

IN

= +25°C

T

J

I

= 5mA to 1A, TJ = +25°C

OUT

V

= 11.5V to 21.5V, f = 120Hz,

IN

= 500mA

I

OUT

△ V

OUT

= 0

OUT

= 1%, I

= 500mA,

OUT

= 1A, TJ =

OUT

+25°C

f = 10Hz to 100kHz, T

= +25°C

A

f = 1kHz

7.84 8 8.16

V

7.7 – 8.3

–

25 75

mV

– 3.2 6 mA

– 0.3 0.8

mA

– 0.08 0.5

– 62 – dB

– 2 – V

– 10 –

µV/V

mΩ

O

△V

(△V

I

SC

IPK

/△T

OUT

OUT/VOUT

△T

Short Circuit Current

Peak Output Current

Output Voltage Temperature

)/

Coefficient

= 35V, TA = +25°C

V

IN

VIN = 14V, TJ = +25°C

– – 0.64 –

– – 80 –

– 0.2 – A

– 2.2 – A

mV/°C

ppm/°C

TO-220-3 – 9 –

TO-252-2 (3)/

θ

JC

Thermal Resistance

TO-252-2 (4)/

– 16 –

°C/W

TO-252-2 (5)

TO-220F-3 – 9 –

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