SPX5940AT-3.3 Sipexoration, SPX5940AT-3.3 Datasheet

SPX5940AT-3.3

Manufacturer Part Number

SPX5940AT-3.3

Description

1A Low Drop Out Voltage Regulator

Manufacturer

Sipexoration

Datasheet

1.SPX5940AT-3.3.pdf (7 pages)

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FEATURES

• Output Accuracy 3.3V, @ 1A Output

• Very Low Quiescent Current

• Low Dropout Voltage

• Extremely Tight Load And Line Regulation

• Very Low Temperature Coefficient

• Current & Thermal Limiting

• Error Flag Warns Of Output Dropout

PRODUCT DESCRIPTION

The SPX3940/41/42 is a low power voltage regulator. This device is an excellent choice for battery-powered applications such as

cordless telephones, radio control systems and portable computers. The SPX3940/41/42 features very low quiescent current (100µA

Typ.) and very low dropout voltage. This includes a tight initial tolerance of 1% max and 2% max., and very low output temperature

coefficient, making the SPX3940/41/42 useful as a low-power voltage reference.

The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling voltage input of batteries.

Another feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. The SPX3940/41/42 is

offered in 3-pin and 5-pin TO-220 package SOT-223, and surface mount TO-263 packages.

The regulator output voltage (of the 8-pin SO-8 and 5-pin TO-220 & TO-263) may be pin-strapped for a 3.3V or programmed from

1.24V to 29V with an external pair of resistors.

TO-263-5 Package

1 2 3 4 5

SPX3941/42

Top View

Five Lead Package Pin Functions:

SPX3941

ERROR

INPUT

GND

OUTPUT

SHUTDOWN

ADJUST

SHUTDOWN

GND

INPUT

OUTPUT

SPX3942

TO-220-5 Package

SPX3941/42

Top View

PIN CONNECTIONS

1A Low Drop Out Voltage Regulator

TO-252 Package

SOT-223 Package

Front View

SPX3940

APPLICATIONS

• Battery Powered Systems

• Cordless Telephones

• Radio Control Systems

• Portable/Palm Top/Notebook Computers

• Portable Consumer Equipment

• Portable Instrumentation

• Automotive Electronics

• SMPS Post-Regulator

• Voltage Reference

GND/

ADJ

OUT

ADJ/GND

OUT

(PRELIMINARY INFORMATION)

TO-220 Package

Front View

SPX3940

SPX3940/41/42

TO-263Package

with Shutdown

Rev. 12/19/00

GND/ ADJ

OUT

GND/ ADJ

OUT

Related parts for SPX5940AT-3.3

SPX5940AT-3.3 Summary of contents

Page 1

FEATURES • Output Accuracy 3.3V Output • Very Low Quiescent Current • Low Dropout Voltage • Extremely Tight Load And Line Regulation • Very Low Temperature Coefficient • Current & Thermal Limiting • Error Flag Warns Of Output ...

Page 2

ABSOLUTE MAXIMUM RATINGS Power Dissipation..........................................Internally Limited Lead Temp. (Soldering, 5 Seconds) ................................ 260°C Storage Temperature Range .............................. -65° to +150°C Operating Junction Temperature Range (Note 9) SPX3940/41/42...................................... -40C° to +125°C ELECTRICAL CHARACTERISTICS operating temperature range. PARAMETER CONDITIONS (Note 2) 3.3V ...

Page 3

PARAMETER CONDITIONS Output Leakage Current V = 30V 0H Output Low Voltage 400µA 0L Upper Threshold Voltage (Note 8) Lower Threshold Voltage (Note 8) Hysteresis (Note 8) Input logic Voltage Low (Regulator ON) ...

Page 4

APPLICATION HINTS EXTERNAL CAPACITORS The stability of the SPX3940/41/42 requires a 2.2µF or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electrolytic works fine here. For operations of below -25°C ...

Page 5

Also, it may be programmed for any output voltage between its 1.235V reference and its 30V maximum rating. Figure 2, an external pair of resistors is required. Refer to the below equation for the programming of the output voltage:: V ...

Page 6

TYPICAL APPLICATIONS SPX3940 FIXED +3.3V REGULATOR + OUT SPX3940 GND 4 SPX3940/41/ 3.3V OUT + 10uF Rev. 12/19/00 ...

Page 7

... SPX3940AM3-5.0 SPX3940M3 SPX3940M3-3.3 SPX3940M3-5.0 SPX3940AR SPX3940AR-3.3 SPX3940AR-5.0 SPX3940R SPX3940R-3.3 SPX3940R-5.0 SPX3940AU SPX3940AU-3.3 SPX3940AU-5.0 SPX3940U SPX3940U-3.3 SPX3940U-5.0 SPX3940AT SPX5940AT-3.3 SPX3940AT-5.0 SPX3940T SPX3940T-3.3 SPX3940T-5.0 SPX3941R-3.3 SPX3941R-5.0 SPX3941U-3.3 SPX3941U-5.0 SPX3941T-3.3 SPX3941T-5.0 SPX3942R SPX3942U SPX3942T Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: ...

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