SPX2340T-3.3

SPX2940 SIPEX | Alldatasheet

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Technical content

Date: 5/25/04 SPX2940 1A Low Dropout Voltage Regulator © Copyright 2004 Sip ex Corporation 1A Low Dropout Voltage Regulator Fixed Output, Fast Response SPX2940

DESCRIPTION

FEATURES

■ Guaranted 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 LM2940, MIC2940A, AS2940 ■ Standard TO-220 and TO-263 packages The SPX2940 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 SPX2940 is offered in 3-pin TO-220 & TO-263 packages. For a 3A version, refer to the SPX29300 data sheet. SPX2940 VOUTVIN +6.8µF +10µF Figure 1. Fixed Output Linear Regulator.

APPLICATIONS

■ Powering VGA & Sound Card ■ LCD Monitors ■ USB Power Supply ■ Power PCTM Supplies ■ SMPS Post-Regulator ■ PDA or Notebook Computer ■ High Efficiency Linear Power Supplies ■ Portable Instrumentation ■ Constant Current Regulators ■ Cordless Telephones ■ Automotive Electronics Now Available in Lead Free Packaging 12 3 SPX2940

3 Pin TO-263

Date: 5/25/04 SPX2940 1A Low Dropout Voltage Regulator © Copyright 2004 Sip ex Corporation ABSOLUTE MAXIMUM RATINGS NOTES: Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its normal value. Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current. Note 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Note 5: Maximum positive supply voltage of 20V must be of limited duration (<100ms) and duty cycle (<1%). The maximum continuous supply voltage is 16V. at VIN=VOUT + 1V and IOUT = 10 mA, CIN = 6.8 µF, COUT = 10µF; TA= 25°C, unless otherwise specified. The Boldface applies over the junction temperature range. Adjustable versions are set at 5.0V. PARAMETER CONDITIONS TYP MIN MAX UNITS 1.8V Version Output Voltage I OUT = 10mA 1.8 1.746 1.854 V 10mA≤IOUT≤1A, 6V≤VIN≤16V 1.8 1.710 1.890 2.5V Version Output Voltage I OUT = 10mA 2.5 2.425 2.575 V 10mA≤IOUT ≤1A, 6V≤VIN≤16V 2.5 2.375 2.625 3.3V Version Output Voltage I OUT = 10mA 3.3 3.201 3.399 V 10mA≤IOUT ≤1A, 6V≤VIN≤16V 3.3 3.135 3.465 5.0V Version Output Voltage I OUT = 10mA 5.0 4.850 5.150 V 10mA≤IOUT ≤1A, 6V≤VIN≤16V 5.0 4.750 5.250 All Voltage Options Line Regulation I O=10mA, (VOUT+1V)≤VIN≤16V 0.2 1.0 % Load Regulation V IN=VOUT+1V, 10mA≤IOUT≤1A 0.3 1.5 % ∆V Output Voltage 20 100 ppm/°C ∆T Temperature Coef. Dropout Voltage (Note 1) IO =100mA 70 200 mV (except 1.8V version) I O =1A 280 550 Ground Current (Note 3) IO =750mA, VIN=VOUT, + 1V 12 25 mA IO =1A 18 IGNDDO Ground Pin VIN=0.1V less than specified V OUT 1.2 mA Current at Dropout I OUT= 10mA Current Limit V OUT=0V (Note 2) 2.2 1.5 A Output Noise Voltage C L= 10µF 400 µVRMS 10Hz to 100kHz) IL=100mA C L=33µF 260 Thermal Resistance TO-220 Junction to Case, at Tab 3 TO-220 Junction to Ambient 60 °C/W TO-263 Junction to Case, at Tab 3 TO-263 Junction to Ambient 60

ELECTRICAL CHARACTERISTICS

Date: 5/25/04 SPX2940 1A Low Dropout Voltage Regulator © Copyright 2004 Sip ex Corporation The SPX2940 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and nega- tive transient voltage. Thermal Considerations Although the SPX2940 offers limiting circuitry for overload conditions, it is still necessary to insure that the maximum junction temperature is not exceeded in the application. Heat will flow through the lowest resistance path, the junction-to-case path. In order to insure the best thermal flow of the component, proper mount- ing is required. Consult heatsink manufacturer for thermal resistance and design of heatsink. For example, TO-220 design: Assume that V IN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 50°C/W, θHA= 1°C/W, θCH = 2°C/W, and θJC = 3°C/W. Where TA = ambient temperature θ HA = heatsink to ambient thermal resistance θCH = case to heatsink thermal resistance θJC = junction to case thermal resistance The power calculated under these conditions is: PD = (VIN - VOUT) * IOUT = 7.5W. And the junction temperature is calculated as TJ = TA + PD * (θHA + θCH + θJC) or Reliable operation is insured. Capacitor Requirements The output capacitor is needed to insure stability and minimize the output noise. The value of the capacitor varies with the load. However, a minimum value of 10µF aluminum capacitor will guarantee stability over all load conditions. A tantalum capacitor is recommended if a faster load transient response is needed. If the power source has a high AC impedance, a 0.1µF ceramic capacitor between input & ground is recommended. Minimum Load Current To ensure a proper behavior of the regulator under light load, a minimum load of 5mA for SPX2940 is required. SPX2940 VOUTVIN +6.8µF +10µF Figure 18. Fixed Output Linear Regulator.

APPLICATION INFORMATION

Date: 5/25/04 SPX2940 1A Low Dropout Voltage Regulator © Copyright 2004 Sip ex Corporation PACKAGE: 3 PIN TO-263 E D e b .160 - .190 .000 - .010 Dimensions in inches3-PIN TO-263 JEDEC TO-263 (AA) Variation .020 - .039 .015 - .029 .070 - .110 - - A b c D E L MIN NOM MAX e .100 BSC .066- .330 - .380 D1 .270 - - .380 - .420 .245 -- H .575 - .625 .070 L3 .010 BSC 123 c A H SEATING PLANE L 0º-8º See View C E/2 View C GAUGE PLANE SEATING PLANE c WITH PLATING BASE METAL b SECTION B-B B B

Date: 5/25/04 SPX2940 1A Low Dropout Voltage Regulator © Copyright 2004 Sip ex Corporation B SEATING PLANE A CHAMFER OPTIONAL C A A E øPQ D E2 E/2 L C C D D b c WITH PLATING BASE METAL b CONTACT AREA e .140 - .190 .020 - .055 Dimensions in (mm)

3 PIN TO-220

(AB) Variation .080 - .115 .015 .027 .040 .045 - .070 .480 - .507 A b .380 - .420E MIN NOM MAX c .014 - .024 D .560 - .650 .330 - .355 E1 .270 - .350 E2 - - .030 e .100 BSC e1 .200 BSC H1 .230 - .270 L1 - - .250 L2 - - - ∆P .139 - .161 Q .100 - .135 PACKAGE: 3 PIN TO-220

Date: 5/25/04 SPX2940 1A Low Dropout Voltage Regulator © Copyright 2004 Sip ex Corporation PART NUMBER ACC. OUTPUT VOLTAGE PACKAGE SPX2940U-1.8 3% 1.8V 3 Lead TO-220 SPX2940U-2.5 3% 2.5V 3 Lead TO-220 SPX2940U-3.3 3% 3.3V 3 Lead TO-220 SPX2940U-5.0 3% 5.0V 3 Lead TO-220 SPX2940T-1.8 3% 1.8V 3 Lead TO-263 SPX2940T-1.8/TR 3% 1.8V 3 Lead TO-263 SPX2940T-2.5 3% 2.5V 3 Lead TO-263 SPX2940T-2.5/TR 3% 2.5V 3 Lead TO-263 SPX2340T-3.3 3% 3.3V 3 Lead TO-263 SPX2340T-3.3/TR 3% 3.3V 3 Lead TO-263 SPX2940T-5.0 3% 5.0V 3 Lead TO-263 SPX2940T-5.0/TR 3% 5.0V 3 Lead TO-263 Corporation ANALOG EXCELLENCE Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability aris ing out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. Sipex Corporation Headquarters and Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600

ORDERING INFORMATION

TAB = GND 12 3 Front View TAB = GND VIN VOUTGND 321 PACKAGE PINOUTS Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX2940T-3.3/TR = standard; SPX2940T-3.3-L/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263.