AIC AIC1085-33CT, AIC1085-33CM, AIC1085-33CE, AIC1085-18CT, AIC1085-18CM Datasheet

AIC1085

1%

1%

213

3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

SPEC NO: DS-1085-01 FEB 02, 01

n FEATURES

l Dropout Voltage 1.3V at 3A Output Current.
l Fast Transient Response.
l Extremely Tight Line and Load Regulation.
l Internal Thermal and Current Limiting.
l Adjustable Output Voltage or Fixed 1.5V, 1.8V,

3.3V.

l Standard 3-Pin Power Packages.

n APPLICATIONS

l Mother Board I/O Power Supplies.
l Microprocessor Power Supplies.
l High Current Regulator.
l Post Regulator for Switching Supply.

n TYPICAL APPLICATION CIRCUIT

ADJ

23

RF2

205

REF

V

OUT

3.3V

RF1

Ω

125

+

C2

Ω

10µF

V
5V

IN

+ V

C1

10µF

AIC1085

1

n DESCRIPTION

The AIC1085 is a low dropout three terminal
regulator with 3A output current capability. The
output voltage is adjustable with the use of a resistor
divider or fixed 1.5V, 1.8V, and 3.3V. Dropout is
guaranteed at a maximum of 1.4V 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.

V

REF=VOUT

V

OUT=VREF

I

ADJ

(1) C1 needed if device is far away from
(2) C2 required for stability.

- V

ADJ

x (1+RF2/RF1)+ I

=55µA (typ.)

filter capacitors.

=1.25V (typ.)

ADJ

x RF2

Adjustable Voltage Regulator

V
5V

IN

+

C1

10µF

AIC1085-33

GND

+

C2
10µF

V

OUT

3.3V

Fixed Voltage Regulator

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: [phone] FAX:[phone]

n ORDERING INFORMATION

231

AIC108

5-XXXX

AIC1085

3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

SPEC NO: DS-1085-01 FEB 02, 01

ORDER NUMBER PIN CONFIGURATION

PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220

TEMPERATURE RANGE
C: 0°C~70°C

OUTPUT VOLTAGE

DEFAULT: ADJ.

15: 1.5V
18: 1.8V
33: 3.3V

n ABSOLUTE MAXIMUM RATINGS

AIC1085CE
(TO-252)

AIC1085CM
(TO-263)

AIC1085CT
(TO-220)

FRONT VIEW
1: ADJ (GND)

2: VOUT (TAB)
3: VIN

FRONT VIEW
1: ADJ (GND)

2: VOUT (TAB)
3: VIN

FRONT VIEW
1: ADJ (GND)

2: VOUT (TAB)
3: VIN

2 31

1 2 3

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-252 …………………….…………… 15°C/W

TO-263, TO-220 ………............………... 6°C /W

Thermal Resistance Junction to Ambient TO-252 …………………………..… 100°C/W

(Assume no ambient airflow, no heatsink) TO-263 ….....…….....……………... 60°C /W

TO-220 …....……....……………….. 50°C /W

Lead Temperature (Soldering) 10 sec. .....................………............……..….......260°C

n TEST CIRCUIT

Refer to TYPICAL APPLICATION CIRCUIT.

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: [phone] FAX:[phone]

AIC1085

3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

SPEC NO: DS-1085-01 FEB 02, 01

n ELECTRICAL CHARACTERISTICS (V

=5V, TA=25°C, IO=10mA, Unless otherwise

IN

specified)

PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT

Reference Voltage (V

Output Voltage

OUT -VADJ

)

AIC1085 (Adj.)
TA=25°C
AIC1085-15 VIN=5V

AIC1085-18 VIN=5V
AIC1085-33 VIN=5V

1.238

1.48

1.78

3.26

1.25

1.50

1.80

3.30

Line Regulation Adj : 2.75V≤ VIN ≤5.25V %

Fix : V

OU T

+1V≤ V

IN

≤7V

0.015 0.2

TA=25°C

Load Regulation

10mA < I

O

< 3A

0.6 %

TA=25°C
∆V

Dropout Voltage

, ∆V

OUT

10mA ≤ IO ≤3A

REF

=1%

1.3 1.4 V
0°C ≤TJ ≤125°C
VIN = 5V

Current Limit

3 4 A

0°C ≤TJ ≤125°C

1.262

1.52

1.82

3.34

V

V

Adjusted Pin Current (I

) 2.75V ≤ V

ADJ

Adjusted Pin Current Change
(∆I

)

ADJ

Temperature Stability

Minimum Load Current

RMS Output Noise (% of V

OUT

Ripple Rejection Ratio

≤ 7V 55 120 µA

IN

2.75V ≤ V

IN

≤ 7V

0.2 5 µA
0°C ≤TJ≤125°C

IO=0.5A

0.5 %
0°C ≤TJ≤125°C

0°C ≤TJ ≤125°C 5 10 mA

)

10Hz ≤ f ≤ 10KHz 0.003 %
120Hz input ripple

C

OUT

(VIN-V

=25µF

)=3V

OUT

60 72 dB

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: [phone] FAX:[phone]