spx3940am3-l-5-0-tr Exar Corporation, spx3940am3-l-5-0-tr Datasheet

spx3940am3-l-5-0-tr

Manufacturer Part Number

spx3940am3-l-5-0-tr

Description

1.0a Low Dropout Voltage Regulator

Manufacturer

Exar Corporation

Datasheet

1.SPX3940AM3-L-5-0-TR.pdf (11 pages)

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The SPX3940 is a 1A, accurate voltage regulators with a low drop out voltage of 280mV(typical)

at 1A. These regulators are specifically designed for low voltage applications that require a low

dropout voltage and a fast transient response. They are fully fault protected against over-current,

reverse battery, and positive and negative voltage transients.

The SPX3940 is offered in 3-pin SOT-223, TO-220 & TO-263 packages. For a 3A version, refer

to the SPX29300 data sheet.

Date: 4/14/06 Rev A

Figure 1. Fixed Output Linear Regulator.

FEATURES

■ 1% Output Accuracy SPX3940A

■ Guaranteed 1.5A Peak Current

■ Low Quiescent Current

■ Low Dropout Voltage of 280mV at 1A

■ Extremely Tight Load and Line Regulation

■ Extremely Fast Transient Response

■ Reverse-battery Protection

■ Internal Thermal Protection

■ Internal Short Circuit Current Limit

■ Replacement for LM3940

■ Standard SOT-223, TO-220

Now Available in Lead Free Packaging

and TO-263 packages

1A Low Dropout Voltage Regulator

6.8µF

Fixed Output, Fast Response

SPX3940 1A Low Dropout Voltage Regulator

SPX3940

APPLICATIONS

■ VGA & Sound Card

■ Automotive Electronics

■ LCD Monitors

■ Cordless Telephones

■ Power PC

■ SMPS Post-Regulator

■ Laptop, Palmtop, and Notebook Computer

■ High Efficiency Linear Power Supplies

■ Constant Current Regulators

■ Portable Instrumentation

TYPICAL APPLICATIONS CIRCUIT

10µF

Supplies

3 Pin TO-263

SPX3940

OUT

GND

SPX3940

DESCRIPTION

OUT

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spx3940am3-l-5-0-tr Summary of contents

Page 1

Low Dropout Voltage Regulator Fixed Output, Fast Response FEATURES ■ 1% Output Accuracy SPX3940A ■ Guaranteed 1.5A Peak Current ■ Low Quiescent Current ■ Low Dropout Voltage of 280mV at 1A ■ Extremely Tight Load and Line Regulation ■ ...

Page 2

ABSOLUTE MAXIMUM RATINGS Lead Temperature (soldering, 5 seconds) ................................. 260°C Storage Temperature Range ..................................... -65°C to +150°C Operating Junction Temperature Range ................... -40°C to +125°C Input Voltage (Note 5) ................................................................... 16V and ...

Page 3

IN 1.240V Reference Ibias 3.320 3.315 3.310 3.305 3.300 3.295 3.290 3.285 3.280 (V) IN Figure 2. Line Regulation 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 0 0.25 0.5 0.75 Figure 4. Ground ...

Page 4

IL(A) Figure 6. Ground Current vs Load Current in Dropout 280 270 260 250 240 230 220 210 200 190 180 -40 - ...

Page 5

Figure 12. Ground Current vs Temperature at I 350 330 310 290 270 250 230 210 190 170 150 -40 - ...

Page 6

The SPX3940 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and nega- tive transient voltage. Thermal Considerations Although the SPX3940 offers limiting circuitry for overload conditions still necessary to insure that the maximum ...

Page 7

E E FRONT VIEW Thermal Pad (L1) D1 BACK VIEW E1 Date: 4/14/06 Rev A Chamfer Optional Gauge Plane θ DETAIL C 3 Pin TO-263 JEDEC TO-263 Inches SYMBOL Controlling ...

Page 8

FRONT VIEW Seating Plane SIDE VIEW Chamfer Optional C A2 Date: 4/14/06 Rev A ø Pin TO-220 JEDEC TO-220 Dimensions in Inches: SYMBOL Controlling Dimension MIN ...

Page 9

A ø 3 Pin SOT-223 SYMBOL MIN 0.02 A2 1.50 b 0.66 b2 2.90 c 0.23 D 6.30 E 6. 0.75 L2 ø 0º SIPEX Pkg Signoff Date/Rev: Date: 4/14/06 Rev A ...

Page 10

TO-263-3 Package ( GND V IN OUT Front View TAB=GND PART NUMBER ACC. SPX3940AU-1-8 1% SPX3940AU-2-5 1% SPX3940AU-3-3 1% SPX3940AU-5-0 1% SPX3940AT-1-8 1% SPX3940AT-1-8/TR 1% SPX3940AT-2-5 1% SPX3940AT-2-5/TR 1% SPX3940AT-3-3 1% SPX3940AT-3-3/TR 1% SPX3940AT-5-0 1% SPX3940AT-5-0/TR ...

Page 11

... SPX3940M3-5-0 2% SPX3940M3-5-0/TR 2% Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX3940AM3-3-3/TR = standard; SPX3940AM3-L-3-3/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263 and 2,500 for SOT-223. Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive ...

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