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AIC1086

1.5A Low Dropout Positive Adjustable Regulator

n FEATURES

l Dropout Voltage 1.3V at 1.5A Output Current.l Fast Transient Response.

l Line Regulation typically at 0.015%.l Load Regulation typically at 0.1%.l Internal Thermal and Current Limiting.

Adjustable Output Voltage or Fixed 2.85V, 3.3V,5V.

Standard 3-Pin Power Packages.

n APPLICATIONS

l Post Regulator for Switching Supply.l Battery Chargers.

l Constant-Current Regulators.l

PC Add-On Card.

n DESCRIPTION

The AIC1086 is a low dropout three terminal regulator with 1.5A output current capability. The output voltage is adjustable with the use of a resistor divider or fixed 2.85V, 3.3V, 5V. Dropout is guaranteed at a maximum of 1.5V at maximum output current. Its low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. Internal current and thermal limiting provides protection against any overload condition that would create excessive junction temperatures.

n TYPICAL APPLICATION CIRCUIT

μF OUT V IN 5V

V REF =V OUT - V ADJ =1.25V (typ.)V OUT =V REF x (1+RF2/RF1)+ I ADJ x RF2I ADJ =55μA (typ.)

(1) C1 needed if device is far away from filter

capacitors.

(2) C2 required for stability.

Adjustable Voltage Regulator

μF

OUT V IN 5V

Fixed Voltage Regulator

n ORDERING INFORMATION

n ABSOLUTE MAXIMUM RATINS

VIN pin to ADJ/GND pin ...........................…….......…….......……………...................... 7V Operating Junction Temperature Range ..................………...................... 0°C ~ 125°C

Storage Temperature Range

...............................…………................. - 65°C ~ 150°C

Thermal Resistance (Junction to Case)

TO-220………........……...…………... 3°C /W TO-263…....……....…………………….3°C /W SOT-223

…....……..………..………..15°C /W

Lead Temperature (Soldering) 10 sec.

.....................………............………...….......260°C

AIC1086

n ELECTRICAL CHARACTERISTICS (V IN=5V, T J=25°C, I O=10mA, Unless otherwise specified)

PARAMETER TEST CONDITIONS MIN.TYP.MAX.UNIT Reference Voltage AIC1086 (Adj.)

T J=25°C

0°C≤T J≤125°C

1.238

1.225

1.25

1.262

1.275

Output Voltage AIC1086-28, V

=5V

AIC1086-33, V

=5V

AIC1086-50, V

=7V

2.82

3.26

4.95

2.85

3.30

5.00

2.88

3.33

5.05

2.65≤V IN≤7V

T J=25°C0.0150.2

Line Regulation

0°C≤T J≤125°C0.0350.2

Load Regulation T J=25°C, I

=10mA ~1.5A

0°C≤T J≤125°C

0.1

0.2

0.3

0.4

Dropout Voltage ?V OUT, ?V REF=1%

I O=1.5A

0°C≤T J≤125°C

1.3 1.5V

Current Limit0°C≤T J≤125°C 1.5 2.0A

Adjusted Pin Current (I ADJ)2.65≤V IN≤7V

10mA≤I O≤ 1.5A

0°C≤T J≤125°C

55120μA

Adjusted Pin Current Change (?I ADJ)2.65≤V IN≤7V

10mA≤I O≤1.5A

0°C≤T J≤125°C

0.25μA

Temperature Stability I O=0.5A

0°C≤T J≤125°C

0.5%

Minimum Load Current0°C≤T J≤125°C510mA RMS Output Noise (% of V OUT)10Hz≤f≤10KHz0.003%

Ripple Rejection Ratio

120Hz input ripple

C OUT=25μF

6072dB

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AIC1086

n TYPICAL PERFORMANCE CHARACTERISTICS

L o a d C u r r e n t

Load Transient Response

Time (μS)04080120160200

O u t p u t V o l t a g e (V , A C )

Line Transient Response

Time (μS)

O u t p u t V o l t a g e (m V , A C )

I n p u t V o l t a g

e (V )

010********

020040060080010001200140016001.18

1.201.221.241.261.281.30Dropout Voltage (V OUT =3.3V)

M i n i m u m D i f f e r e n t i a l V o l t a g e (V )

Output Current (mA)Minimum Operating Current

Differential Voltage (V)

M i n i m u m O p e r a t i n g C u r r e n t (m A )

2345

0.20.40.60.81.01.21.41.61.8886-3-5753170

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n BLOCK DIAGRAM

V IN

V OUT

n PIN DESCRIPTIONS

ADJ PIN-Providing V REF=1.25V (typ.) for adjustable V OUT. V REF=V OUT-V ADJ and I ADJ=55μA (typ.) (GND PIN-Power ground.)

VOUT PIN-Adjustable output voltage.

VIN PIN-Power Input.

n PHYSICAL DIMENSIONS l TO-220 (unit: mm)

SYMBOL MIN MAX

A 3.56 4.82

D14.2316.51

E9.6610.66

e 2.29 2.79

e10.50 1.15

e2- 1.10

F0.51 1.39

J1 2.04 2.92

L12.7014.73

l TO-252 (unit: mm)

SYMBOL MIN MAX

A 2.19 2.38

A1 1.02 1.27

b0.640.88

b2 5.21 5.46

C10.460.58

D 5.33 5.59

E 6.35 6.73

e 2.28 (TYP.)

H9.4010.42

L0.51-

AIC1086

l SOT-223

SYMBOL MIN MAX A10.020.12B 0.600.80B1

2.90

3.15C 0.240.35D 6.30 6.80E 3.30 3.70e

2.30 (TYP.)

6.70

7.30

SOT-223 Marking

Part No.Marking AIC1086CY 1086AIC1086-28CY AX28AIC1086-33CY AX33AIC1086-50CY

AX50

l TO-263 (unit: mm)

SYMBOL

MIN MAX A

4.06 4.83b 0.50 1.00b2 1.14 1.40C

-0.7c2 1.14 1.40D 8.639.66E

9.6510.29e

2.54 (TYP.)

L 14.6015.88L1 2.28 2.80A

1.40

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