AIC AIC1117A-50CY, AIC1117A-50CT, AIC1117A-50CM, AIC1117A-50CE, AIC1117A-33CY Datasheet

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AIC1117A

1A Low Dropout Positive Adjustable Regulator

FEATURES

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l Dropout Voltage 1. 3V at 1A 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.
l Adjustable Output Voltage or Fixed 2.85V, 3.3V,

5V.

l Standard 3-Pin Power Packages.

APPLICATIONS

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l Post Regulator for Switching Supply.
l Active SCSI Termination.
l Battery Chargers.
l Constant-Current Regulators.
l Motherboard Clock Supplies.

TYPICAL APPLICATION CIRCUIT

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DESCRIPTION

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The AIC1117A is a low dropout three terminal
regulator with 1A 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 tem peratures.

V

IN

5V

C1

10µF

AIC1117A

+ V

ADJ

1

Adjustable Voltage Regulator

V

IN

5V

C1

10µF

AIC1117A-33

+

GND

Fixed Voltage Regulator

23

RF2

205

REF

V

V

OUT

3.3V

RF1

Ω

125

+

C2

Ω

10µF

REF=VOUT

V

OUT=VREF

I

=55µA (typ.)

ADJ

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

- V

ADJ

x (1+RF2/RF1)+ I

capacitors.

=1.25V (typ.)

ADJ

x RF2

(2) C2 required for stability.

V

OUT

3.3V

+

C2
10µF

Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw

DS-1117A-00 May 21, 01 TEL: [phone] FAX: [phone]

ORDERING INFORMATION

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231

231

231

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AIC1117A

AIC1117A-XXCX

PACKAGING TYPE
E: TO-252
M: TO-263
T: TO-220
Y: SOT-223

DEFAULT: ADJ.

28: 2.85V
33: 3.3V
50: 5.0V

ORDER NUMBER

AIC1117ACE
(TO-252)

AIC1117ACM
(TO-263)

AIC1117ACT
(TO-220)

PIN CONFIGURATION

FRONT VIEW
1: ADJ

2: VOUT (TAB)
3: VIN

FRONT VIEW
1: ADJ

2: VOUT (TAB)
3: VIN

FRONT VIEW
1: ADJ

2: VOUT (TAB)
3: VIN

AIC1117ACY
(SOT-223)

FRONT VIEW
1: ADJ

2: VOUT (TAB)
3: VIN

2

ABSOLUTE MAXIMUM RATINS

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VIN pin to ADJ/GND pin ...........................…….......…….......……………...................... 7V

Operating Junction Temperature Range ..................………...................... 0°C ~ 125°C

Power Dissipation …………………………………………………………….Internally Limited

Thermal Resistance (Junction to Case) TO-220 ………........……...…………... 3°C /W

TO-263 …....……....…………………….3°C /W

SOT-223 …....……..………..………..15°C /W

TO-252 ……………………………..12.5°C /W

Thermal Resistance (Junction to Ambient) TO-220 …....……....………………… 50°C/W

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

SOT-223 ……………………………..155°C/W

TO-252 ……………………………..100°C/W

Storage Temperature Range ...............................…………................. - 65°C ~ 150 °C

AIC1117A

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

ELECTRICAL CHARACTERISTICS

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(VIN=5V, TJ=25 °C, IO=10mA, Unless otherwise

specified)

PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT

Reference Voltage TJ=25°C

0°C≤TJ≤125°C

2.65V≤VIN≤7V
10mA≤IO≤1A
AIC1117A-28, VIN=5V
AIC1117A-33, VIN=5V
AIC1117A-50, VIN=7V

Output Voltage

AIC1117A
0°C≤TJ≤125°C

1.238

1.225

2.82

3.26

4.95

1.25

1.25

2.85

3.30

5.00

1.262

1.275
V

2.88

3.33

5.05
V

2.65V≤VIN≤7V
10mA≤IO≤1A

2.65≤VIN≤7V
TJ=25°C 0.015 0.2Line Regulation
0°C≤TJ≤125°C 0.035 0.2

0.98V

V

N

1.02V

N

N

%V

OUT

3