ANPEC APL1085 Service Manual

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APL1085

3A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V

Features General Description

••

• Fast Transient Response

••

• Guaranteed Dropout Voltage at Multiple Cur-

••

rents

••

• Load Regulation : 0.05% Typ.

••

• Line Regulation : 0.03% Typ.

••

• Low Dropout Voltage : 1.2V Typ. at I

••

• Trimmed Current Limit : 3A Typ. at T

••

• On-Chip Thermal Limiting : 150 °C Typ.

••

• Standard 3-pin TO-220 , TO-252 and TO-263

••

=3A

OUT

=125 °C

J

Power Package

Applications

••

• Pentium

••

• PowerPC

••

• Low Voltage Logic Supplies

••

• Battery-Powered Circuitry

••

• Post Regulator for Switching Power Supply

••

TM

Processor Supplies

TM

Supplies

The APL1085 is a low dropout three-terminal adjustable regulator with 3A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications, the APL1085 has been optimized. The output available voltage range of adjustable version is from 1.25~5.75V with an input supply below 7V , and the fixed 3.3V output voltage device is also available.

Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures.

The APL1085 is available in both the through-hole and surface mount versions of the industry standard

Pin Description

TAB is V

OUT

3

2

1

V

IN

V

OUT

ADJ

Front View APL1085 TO-220 Package

V

IN

V

OUT

ADJ

TAB is V

OUT

3

2

1

Front View APL1085 TO-252 Package

V

IN

V

OUT

ADJ

TAB is V

OUT

3

2

1

Front View APL1085 TO-263 Package

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright  ANPEC Electronics Corp. Rev. B.5 - Jun., 2003

www.anpec.com.tw1

APL1085

Ordering Information

APL1085 -

AP L1085:

AP L1085 XXXXX

Lead Free Code

Handling Code

Tem p. Range

Package C ode

Voltage Code

XXXXX

- D a te C od e

Package C ode

F : TO-220 G : TO-263 U : TO-252 Tem p. Range

C : 0 to 70 C Handling Code

TU : Tube TR : Tape & Reel Voltage Code :

33 : 3.3V Blank : Adjustable Version Lead Free Code L : Lead Free Device Blank : Original Device

AP L1085-33 :

°

33

AP L1085 XXXXX

XXXXX

- D a te C od e

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V T

T

STG

T

Input Voltage 7 V

I

Operating Junction Temperature Range

J

Control Section Power Transistor

0 to 125

0 to 150 Storage Temperature Range -65 to +150 Lead Temperature (Soldering, 10 second) 260

L

C

°

C

°

C

°

Electrical Characteristics

V

REG

I

LIMIT

I

Reference Voltage

REF

Output Voltage

OUT

Line Regulation

LINE

Load Regulation

LOAD

V

Dropout Voltage

D

Current Limit

Adjust Pin Current

ADJ

APL1085-3.3

APL1085

APL1085-3.3

APL1085

APL1085-3.3

1.5V≤(V 10mA≤ I 10mA≤ I T

J

T

J

2.75V≤V

4.75V≤V T

J

(V V

I N

V

∆

(V

IN -VOUT

OUT

=0~125°C

=0~125°C, (Notes 1)

≤

IN

≤

IN

=25°C, (Notes 1)

=3V, 10mA≤ I

)

IN -VOUT

=5V, 0mA≤ I

=1% ,I

REF

=1.7V, T

)

IN -VOUT

T

(V

IN -VOUT

=3V, T

)

T (V T

=0∼

J

IN -VOUT

=3V, I

)

125°C

≤5.75V,

)

=0~125°C

3A, T

≤

J

3A, 4.75V≤V

7V, I 7V, I

OUT

=

OUT

=

OUT

≤

OUT

=3A ,T

=10mA,

OUT

10mA, 0mA ,

3A

J

7V,

≤

IN

3A

≤

OUT

=0~125°C

C

=25°

J

125°C

=

J

C

=25°

J

125°C

=

J

APL1085Symbol Parameter Test Conditions

Unit

Min. Typ. Max.

1.225(-2%) 1.250 1.275(+2%) V

3.235(-2%) 3.300 3.365(+2%) V

0.03 0.2 %

%

0.05

0.3

0.5

1.3 1.4 V

4.5

3.5

5.0

4.0

6.0

5.0

6.5

5.5 60 120

µ

A

Copyright  ANPEC Electronics Corp. Rev. B.5 - Jun, 2003

www.anpec.com.tw2

APL1085

Electrical Characteristics Cont.

APL1085Symbol Parameter Test Conditions

Unit

Min. Typ. Max.

∆

I

Adjust Pin Current

I

ADJ

Change APL1085

Minimum Load

LMIN

Current APL1085

I

Quiescent Current

Q

≤

3A

)≤5.75V,

1.5V≤( V 10mA≤ I

1.5V≤( V T

=0∼

J

V

I N

IN -VOUT

OUT

IN -VOUT

125°C

=5V 8 13 mA

0.2 5

210mA

APL1085-3.3

PSRR Ripple Rejection

L

Long -Term

S

F=120Hz, C (V

IN -VOUT

T

=

J

)=3V, I

125°C,1000Hrs.

=22µF, Ta nt . ,

out

=3A

OUT

60 dB

0.03 1.0 %

Stability

V

N

θ

JC

RMS Output Noise(% of V

Thermal Resistance

OUT

T

C,10Hz? F? 10kHz

=25°

J

)

Control Circuitry/Power Transistor

0.003 %

0.7/3.0

°

Junction to Case

NOTE 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulations are

measured at a constant junction temperature by low duty cycle pulse testing.

Application Circuits

A

µ

C/

W

(2.75V~7V)

V

IN

V

(5V)

IN

10µ

C

*Required for stability APL1085:C2=10µF * R1 is typically in range of 100Ω to 120Ω

Copyright  ANPEC Electronics Corp. Rev. B.5 - Jun, 2003

Typical Regulator

+

F

C

1

APL1085

+

Solid Tantalum C

2*

(1.250V/ 3A)

V

OUT

5V to 3.3V Regulator

+

F

1

APL1085

+

R1

R2

R1/(R1+R2)=1.250V/3.3V

V

(3.3V/ 3A)

OUT

Solid Tantalum C

2*

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APL1085

Typical Characteristics

Dropout Voltage vs Output Current

1.5

1.4

1.3

TJ= -50°C

1.2

1.1

1.0

0.9

0.8

Dropout Voltage (V)

0.7

TJ= 25°C

TJ=125°C

0.6

0.5 0 0.5 1 1.5 2 2.5 3

Output Current (A)

TJ=0°C

Short-Circuit Current vs Temperature

14

13

VIN-V

OUT (SHORT CIRCUIT)

=5V

12

11

10

9

8

7

Shout- Circuit Current (A)

6

5

4

-50 0 50 100 150

VIN-V

OUT(SHORT CIRCUIT)

=3.3V

Temperature (°C)

Load Regulation vs Temperature

0.10

∆

I =3A

0.05

0.0

-0.05

-0.10

-0.15

Output Voltage Deviation (%)

-0.20

-50 0 50 100 150

Temperature (°C)

Reference Voltage vs Temperature

1.275

1.270

1.265

1.260

1.255

1.250

1.245

1.240

1.235

Reference Voltage (V)

1.230

1.225

-50 0 50 100 150

Temperature (°C)

Copyright  ANPEC Electronics Corp. Rev. B.5 - Jun, 2003

www.anpec.com.tw4