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Kynix Part #: KY32-SPX1580T5
Manufacturer Part#:


Product Category: IC Chips
Manufacturer: SIPEX
  datasheetSPX1580T5 Datasheet
Package: TO-263
Quantity: 4822 PCS
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
Moisture Sensitivity Level(MSL): 3(168 Hours)
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Manufacturer: SIPEX
Product Category: IC Chips
Features, Applications


Low Dropout Voltage at 7A Full Load Current Adjustable Ouput Down to 1.25V from ATX Power Supply Fixed Output Voltages of 3.3V and 2.5V Extremely Tight Load and Line Regulation Current Limit and Thermal Protection Standard 5-Terminal Low Cost TO-220 and TO-263

3.3V ATX Power Supplies to 2.9V for Portable PENTIUMTM Processor to 3.5V VRE Supply High efficiency "Green" Computer Systems

The a 7A Low Dropout Regulator with extremely low dropout voltage. The adjustable version requires only two external resistors to set the output voltage. The fixed version has a preset output or 2.5V and does not require any external resistors. The SPX1580 features a low dropout of 540mV(Typ.) and offers fast transient response. This device is suitable for Pentium applications requiring 2.5V from 3.3V ATX power supplies, where a low current input voltage 1V greater than the output voltage is available. With an external sense pin the load regulation is less than 1mV. This device is an excellent choice for the use of powering low voltage microprocessors that require a lower dropout, fast transient response to regulate from 3.3V and 5V supplies. The SPX1580 is also an excellent choice as a post regulator for switching supplies applications. The SPX1580 offers protection against over-current faults, reversed input polarity, over temperature operation and positive and negative transient voltage. The SPX1580 is offered a 5 pin TO-220 and TO-263 compatible with industry standard 5-terminal regulators. For 5A, 3A and 1.5A ultra low dropout versions refer SPX1581, SPX1582 and SPX1583 data sheets respectively.



(1) VCTRL needed when VIN 5V. (2) VOUT = VREF R2. (3) VREF is measured across adjust to sense.

Power Dissipation..................................... Internally Limited Lead Temp. (Soldering, 10 Seconds)......................... 300°C Storage Temperature Range..................... to +150°C Operating Junction Temperature Range SPX1580 Control Section.......................... +125°C SPX1580 Power Transistor....................... to +150°C Input Supply Voltage..................................................... 7V VCTRL Input Voltage.................................................... 13.2V

Electrical characteristics at VOUT = VSENSE, VADJ 0V, TA=25°C, CCTL = CPWR = COUT = 33μF tantalum cap otherwise specified. The denotes the specifications which apply over full temperature range to +85°C, unless otherwise specified. PARAMETER 2.5V Version Output Voltage 3.3V Version Output Voltage All Voltage Options Reference Voltage (Note 3) Line Regulation Load Regulation (Note 1) Dropout Voltage For VIN (Note 2) (VIN - VOUT) Current Limit Minimum Load Current Thermal Regulation Ripple Rejection Control Pin Current Adjustble Pin Current Thermal Resistance TO-220-5 Thermal Resistance TO-263-5 °C/W μA Junction to Case (JC) Junction to Ambient (JA) Junction to Case (JC) Junction to Ambient (JA) 0.02 %/W dB mA VCTRL = 4.5V, VIN mA 30ms Pulse VCTRL = 5V, VIN = 7A VCTRL = 4.5V, VIN = VOUT 7A mV VCTRL = 7A VCTRL = 4.5V, VIN = 2.05V, VOUT = 100mV VCTRL = 5V, VIN=VOUT V mV VCTRL to 12V, VIN = VOUT to 7A VCTRL = 4.5V, VIN = 10mA VCTRL = 4.5V, VIN to 7A VCTRL to 12V, VIN =VOUT =10mA V VCTRL to 12V, VIN =VOUT 7A V VCTRL to 12V, VIN = VOUT to 7A MIN TYP MAX UNITS CONDITIONS

Note 1: Low duty cycle pulse testing with Kelvin connections is required to order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum differential between VIN and VOUT or VCTRL and VOUT required to maintain regulation at VOUT 95% Nominal VOUT. Note 3: VREF is measured across Adjust pin to Sense pin.

PIN NUMBER 1 2 PIN NAME SENSE ADJ DESCRIPTION Allows Kelvin sense of VOUT at the load. (Positive side of the reference voltage of the device). Negative side of the reference voltage for the device. Adding a small bypass capacitor from the ADJ pin to ground will improve the transient response. Power output of the device. Supply pin for the control circuitry of the device. The current flow into this pin will be about 1% of the output current. VCTRL must be between 1.0V and 1.3V greater than the output voltage for the device to regulate. Output load current is supplied through this pin. VIN must be between 0.1V and 0.8V greater than the output voltage for this device to regulate.

APPLICATION NOTES The SPX1580 is designed as a high performance and low cost solution for application requiring a lower dropout than traditional NPN regulators. The SPX1580 uses a separate input voltage VCTRL ( VCTRL VOUT 1.3V) to minimize the dropout voltage. This allows the 2.5V power for the load to come from a 3.3V system supply. As added benefit this will reduce the heat dissipation*, and lower heatsink and cooling fan cost. A typical application would use 3.3V for VIN and 5.0V for VCTRL from a motherboard power supply to provide a nominal 2.5V output. Using the sense pin allows Kelvin measure the output, reducing resistance-associated errors. The SPX1580 can power the 2.5V core voltage for microprocessors such as a PentiumPCTM, P55CTM, AMD5k86TM and K6TM and the IBM PowerPCTM 603EV and 604EV processors.

Search Part number : "SPX15" Included word is 15
Part Number Manufacturer Package Quantity Description
SPX1582T5-3.3/TR SIPEX TO263-5 166
SPX1584AU-L Sipex TO-220-3 830
SPX1587AR-ADJ SIPEX SOT-252 7419
SPX1587AU-3.3 SIPEX TO-220 35207
SPX1587AR-L Exar Corporation TO-252-3, DPak (2 Leads + Tab), SC-63 3770 IC REG LDO ADJ 3A TO252-3
SPX1587U-L-3-3 Exar Corporation TO-220-3 6664 IC REG LDO 3.3V 3A TO220-3
SPX1580T5-3.3 SIPEX TO263-5 2204
SPX1582T5-ADJ/M SIPEX TO-263 2980
SPX1585AT SIPEX TO-263 48965
SPX1587AT-L-1.5/TR EXAR TO-263-3 636
SPX1587AU33 N/A TO-220 6129
SPX1582T5-L Exar Corporation TO-263-6, D²Pak (5 Leads + Tab), TO-263BA 2390 IC REG LDO ADJ 3A TO263-5
SPX1587AR-L/TR Exar Corporation TO-252-3, DPak (2 Leads + Tab), SC-63 9511 IC REG LDO ADJ 3A TO252-3
SPX1580T5-L SIPEX TO-263-5 81
SPX1585AT-2.5 SIPEX TO263 153
  • SPX1582T5-3.3/TR
  • SPX1584AU-L
  • SPX1587AR-ADJ
  • SPX1587AU-3.3
  • SPX1587AR-L
  • SPX1587U-L-3-3
  • SPX1580T5-3.3
  • SPX1582T5-ADJ/M
  • SPX1585AT
  • SPX1587AT-L-1.5/TR
  • SPX1587AU33
  • SPX1582T5-L
  • SPX1587AR-L/TR
  • SPX1580T5-L
  • SPX1585AT-2.5
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