SPX1083 SIPEX | Alldatasheet

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Rev. 10/23/00 SPX1083 8A Low DropOut Voltage Regulator Adjustable & Fixed 3.3V FEATURES APPLICATIONS

  • Adjustable Output Down to 1.2V or Fixed 3.3V & 5V • Powering Intel Pentium µP from +5V Supplies
  • Output Current of 8A • Power PC Supplies
  • Low Dropout Voltage • SMPS Post-Regulator
  • Extremely Tight Load and Line Regulation • High Efficiency “Green” Computer Systems
  • Current & Thermal Limiting • High Efficiency Linear Power Supplies
  • Standard 3-Terminal Low Cost TO-220 • Portable Instrumentation
  • Similar to Industry Standard LT1083/LT1584 • Constant Current Regulators
  • Adjustable Power Supplies
  • Battery Charger PRODUCT DESCRIPTION The SPX1083 is a low power 8A Adjustable Voltage Regulator that is very easy to use. It requires only 2 external resistors to set the output voltage. This device is an excellent choice when using Powering Intel  Microprocessor to convert from +5V to 3.3V supplies, and as a post regulator for switching supplies applications. The SPX1083 features low dropout of a maximum 1.5 volts. The SPX1083 offers full protection against over-current faults, reversed input polarity, reversed load insertion, over temperat ure operation, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The I Q of this device flows into the load which increases efficiency. The SPX1083 is offered in a 3-pin TO-220 package compatible with older 3-terminal regulators. For a 5A low dropout regulator r efer to the SPX1083 datasheet. Front View TO-220-3 (U) SPX1083 1 23 ADJ/GND VOUT VIN PIN CONNECTIONS

Rev. 10/23/00 SPX1083 ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range ELECTRICAL CHARACTERISTICS (Note 1) at IOUT = 10mA, TA = 25°C, unless otherwise specified. Parameter Conditions SPX1083A SPX1083 Units Typ Min Max Min Max 3.3V Version Output Voltage (Note 2) SPX1083-3.3V, 0≤IOUT≤8A, 4.75V≤VIN≤25V 3.3 3.3 3.270 3.240 3.330 3.360 3.230 3.201 3.370 3.399 V 5.0V Version Output Voltage (Note 2) SPX1083-3.3V, 0≤IOUT≤8A, 6.5V≤VIN≤25V 5.0 5.0 4.950 4.900 5.050 5.100 4.900 4.650 5.100 5.150 All Voltage Options Reference Voltage 10 mA ≤ IOUT ≤ IFULLLOAD 3.3V≤(VIN - VOUT )≤ VIN MAX – VOUT MAX 1.250 1.250 1.238 1.225 1.262 1.270 1.238 1.225 1.262 1.270 V Mid Load Current (V IN- VOUT) = VIN MAX – VOUT MAX 5 10 10 mA Line Regulation 29V ≤VIN - VOUT ≤ VIN MAX – VOUT MAX ILOAD = 10mA 0.015 0.05 0.2 0.5 0.2 0.5 Load Regulation 10mA ≤ IOUT ≤ IFULLLOAD (VIN - VOUT)=3V 0.1 0.2 0.3 0.4 0.3 0.4 Dropout Voltage IOUT=IFULLLOAD , ∆VREF=1% 1.1 1.2 1.2 V Current Limit V IN - VOUT=5V 9.5 8.0 8.0 A Long Term Stability TA=125°C, 1000Hrs. 0.3 1 1 % Adjust Pin Current TA=25°C 55 90 90 µA Adjust Pin Current Change 0.2 5 5 µA Thermal Regulation 30ms pulse 0.003 0.01 0.01 %/W Temperature Stability 0.5 % Ripple Rejection Ratio V IN - VOUT=3V IOUT =3A, COUT = 25µF, CADJ = 25µF, f= 120Hz 75 60 60 dB Output Noise, RMS 10Hz to 10kHz 0.003 % V O Thermal Resistance Junction-to-Case TO-220 Junction to Tab Junction to Ambient 2.7 0.65 2.7 0.65 °C/W The Bold specifications apply to the full operating temperature range. Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 2: A 10µF output capacitor is required on SPX1083

Rev. 10/23/00 SPX1083 TYPICAL CHARACTERISTICS REFERENCE VOLTAGE (V) 1.270 1.260 1.230 TEMPERATURE (ºC) TEMPERATURE STABILITY 1.250 1.240 SHORT CIRCUIT CURRENT (A) INPUT/OUTPUT DIFFERENTIAL (V) 51 01 5 2 02 5 3 0 SHORT CIRCUIT CURRENT MINIMUM OPERATING CURRENT INPUT/OUTPUT DIFFERENTIAL (V) 51 01 5 2 02 5 3 03 5 MINIMUM OPERATING CURRENT MINIMUM INPUT/OUTPUT DIFFERENTIAL (V) 0 68 10 OUTPUT CURRENT (A) DROPOUT VOLTAGE 975 OUTPUT VOLTAGE DEVIATION (%) 0.05 -0.05 -0.15 -0.20 -50 25 150 INPUT/OUTPUT DIFFERENTIAL (V) LOAD REGULATION -25 0 50 100 125 ADJUSTMENT PIN CURRENT (µA) TEMPERATURE (ºC) ADJUSTMENT PIN CURRENT 100 25 50 75 100 125 1500-25-50 25 50 75 100 125 1500-25-50 35754321 -0.10 0.10INDICATES GUARANTEED TEST POINT -40ºC T J 150ºC 0ºC TJ 120ºC TJ =150ºC TJ =25ºC TJ = -55ºC TJ =150ºC TJ =-55ºC TJ =25ºC IFULLLOAD -55ºC 150ºC 25ºC

Rev. 10/23/00 SPX1083 TYPICAL APPLICATIONS Pentium Processor is a trademark of Intel Corp. Power PC is a trademark of IBM Corp. IN OUT ADJ SPX1083 Powering Intel Pentium TM with SPX1083 VIN Intel Pentium TM +5V 3.45V VCC IN OUT ADJ SPX1083 VOUT Fig. 5 Typical Adjustable Regulator VIN LOAD ADJ SPX1083 Fig. 4 8A Current output Regulator VIN OUTIN VOUT = VREF (1 + R2 ) + IADJ R2 VREF

Rev. 10/23/00 SPX1083

ORDERING INFORMATION

Ordering No. Precision Output Voltage Packages SPX1083U 2% Adj 3 Lead TO-220 SPX1083U-3.3 2% 3.3V 3 Lead TO-220 SPX1083U-5.0 2% 5.0V 3 Lead TO-220 SPX1083AU 1% Adj 3 Lead TO-220 SPX1083AU-3.3 1% 3.3V 3 Lead TO-220 SPX1083AT-5.0 1% 5.0V 3 Lead TO-220 SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices:

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liab ility arising out of the application or use of any pr oduct or circuit described hereing; neither does it convey any licens Corporation