SONY AIWA F2100 Diagram

AIC1740

Low Output Voltage, 500mA Low Dropout

Linear Regulator

n FEATURES

•Low Dropout Voltage of 900mV at 500mA Output Current (3.0V Output Version).

•Guaranteed 500mA Output Current.

•Internal 1.5Ω P-MOSFET Draws no Base Current.

•Low Ground Current at 65μA.

•2% Accuracy Output Voltage of 1.8V/ 2.0V/ 2.5V/ 2.7V/ 3.0V.

•Input Voltage Range up to 12V.

•Needs only 4.7μF for Stability.

•Current and Thermal Limiting.

n APPLICATIONS

•Voltage Regulator for CD-ROM Drivers.

•Voltage Regulator for LAN Cards.

•Voltage Regulator for Monitor Microprocessor.

•Voltage Regulator for RAM Module.

•Wireless Communication Systems.

•Battery Powered Systems.

n DESCRIPTION

The AIC1740 is a 3-pin low dropout linear regulator. The superior characteristics of the AIC1740 include zero base current loss, very low dropout voltage, and 2% accuracy output voltage. Typical ground current remains approximately

65μA, from no load to maximum loading conditions. Dropout voltage is exceptionally low. Output current limiting and thermal limiting are built in to provide maximal protection to the AIC1740 against fault conditions.

The AIC1740 comes in the popular SOT-223, TO-251 and TO-252 packages.

nTYPICAL APPLICATION CIRCUIT

VIN

VOUT

AIC1740

VI N

VOUT

+

1μF

GND

+

10μF

CI N

COUT

Low Dropout Linear Regulator

Analog Integrations Corporation	4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC	www.analog.com.tw
DS-1740-00 Aug 2, 00	TEL: [phone] FAX: [phone]	2

AIC1740

n ORDERING INFORMATION

AIC1740-XCX

ORDER NUMBER

PIN CONFIGURATION

PACKAGING TYPE

AIC1740-18CE

FRONT VIEW

E: TO-252

AIC1740-20CE

1: VOUT

AIC1740-25CE

F: TO-251

2: GND

Y: SOT-223

AIC1740-27CE

3: VIN

1

2

3

AIC1740-30CE

OUTPUT VOLTAGE

(TO-252)

18:

1.8V

AIC1740-18CF

20:

2.0V

FRONT VIEW

25:

2.5V

AIC1740-20CF

1: VOUT

27:

2.7V

AIC1740-25CF

2: GND

30:

3.0V

AIC1740-27CF

1

2

3

3: VIN

AIC1740-30CF

(TO-251)

AIC1740-18CY

FRONT VIEW

AIC1740-20CY

1: VOUT

AIC1740-25CY

2: GND

AIC1740-27CY

3: VIN

1

2

3

AIC1740-30CY

(SOT-223)

n ABSOLUTE MAXIMUM RATINGS

Input Supply Voltage ...................................… …			…	… ....................................			-0.3~12V
Operating Junction Temperature Range		.......…	…	… ..............................			-40°C~ 85°C
Storage Temperature Range	.........................…		…	… … ..........................			-65°C~150°C
Power Dissipation ....… … … … … … … … … … … … … ..… … … … … ..… … ...............							0.85W
Thermal Resistance θJC	TO-251, TO-252 Package ....…				… .…	… ..........	12.5°C/W
	SOT-223	Package	....… … … …		..… …	… .............	15°C/W

n TEST CIRCUIT

Refer to the TYPICAL APPLICATION CIRCUIT

2

AIC1740

n ELECTRICAL CHARACTERISTICS (Ta=25°C, CIN=1μF, COUT=10μF, unless otherwise specified.)

PARAMETER	TEST CONDITIONS		MIN.	TYP.	MAX.	UNIT
Output Voltage	No Load
	AIC1740-30	VIN=4.0~12V	2.940	3.0	3.060
	AIC1740-27	VIN=4.0~12V	2.646	2.7	2.754	V
	AIC1740-25	VIN=4.0~12V	2.450	2.5	2.550
	AIC1740-20	VIN=4.0~12V	1.960	2.0	2.040
	AIC1740-18	VIN=4.0~12V	1.764	1.8	1.836
Output Voltage	(Note 1)			50
Temperature						PPM/°C
Coefficiency
Line Regulation	IL=1mA, VIN=4.0~12V			3	10	mV
Load Regulation	VIN=5V, IL=0.1~500mA			20	50	mV
(Note 2)
Current Limit	VIN=5V, VOUT=0V			650		mA
(Note 3)
Dropout Voltage	AIC1740s	IL=0.1mA		0.2	10	mV
(Note 4)	AIC1740-30	IL=500mA		900	1050
	AIC1740-27			950	1100
	AIC1740-25			1000	1150	mV
	AIC1740-20			1260	1410
	AIC1740-18			1370	1520
Ground Current	IO=0.1mA~IMAX, VIN=4V~12V		65	90	μA

Note 1: Guaranteed by design.

Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low ON time. Note 3: Current limit is measured by pulsing a short time.

Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the value measured with a 1V differential.

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