SPX1583

1.5A Ultra-Low Dropout Voltage Regulator
OBS (Obsolete)

Overview

Information 1.5A Ultra Low Dropout Voltage Regulator
Output Option Adjustable
VOUT (V) Adj
VOUT Adj MIN (V) 1.25
VOUT Adj MAX (V) 6
IOUT (mA) 1500
VIN MIN (V) 1.8
VIN MAX (V) 5.5
IQ (µA) 5000
Accuracy (%) 2%
Vdrop (mV) 400
Output Noise (µVRMS) -
PSRR (dB) 80
Junction Temp Range (°C) 0 to 125
Package TO263-5
Features Enable, Remote sense, Current limit and thermal protection
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The SPX1583 is a 1.5A 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 of 3.3V, 2.8V or 2.5V and does not require any external resistors. The SPX1583 features a low dropout of less than 400mV (typical) and offers fast transient response. This device is suitable for Pentium applications requiring 2.8V or 2.5V from 3.3V ATX power supplies, where a low current input voltage 1V greater than the output voltage is needed. With an external sense pin the load regulation is less than 1mV. This device is an excellent choice for the use in powering low voltage microprocessors that require a lower dropout, fast transient response to regulate from 3.3V and 5V supplies. The SPX1583 is also an excellent choice as a post regulator for switching supplies applications.

The SPX1583 offers full protection against overcurrent faults, reversed input polarity, over temperature operation and positive and negative transient voltage.

The SPX1583 is offered in a 5 pin TO-220 and TO-263 compatible with industry standard 5 terminal regulators. For 7A, 5A and 3A ultra low dropout versions refer to SPX1580, SPX1581 and SPX1582 datasheets respectively.

  • Low dropout voltage 500mV at 1.5A full load current
  • Adjustable output down to 1.2V from ATX power supply
  • Extremely tight voltage and line regulation
  • Standard 5-terminal low cost TO-263

Documentation & Design Tools

All Types Product Briefs & Brochures
Type Title Version Date File Size
Product Brochures Power Management Brochure R03 April 2025 6.2 MB

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement PDN
SPX1583T TO-263-5 OBS
SPX1583T-1-5 TO-263-5 OBS
SPX1583T-1-5/TR TO-263-5 OBS
SPX1583T-2-5 TO-263-5 OBS
SPX1583T-2-5/TR TO-263-5 OBS
SPX1583T-3-0 TO-263-5 OBS
SPX1583T-3-0/TR TO-263-5 OBS
SPX1583T-3-3 TO-263-5 OBS
SPX1583T-3-3/TR TO-263-5 OBS
SPX1583T-L TO-263-5 OBS
SPX1583T-L-1-5 TO-263-5 OBS
SPX1583T-L-1-5/TR TO-263-5 OBS
SPX1583T-L-2-5 TO-263-5 OBS
SPX1583T-L-2-5/TR TO-263-5 OBS
SPX1583T-L-3-0 TO-263-5 OBS
SPX1583T-L-3-0/TR TO-263-5 OBS
SPX1583T-L-3-3 TO-263-5 OBS
SPX1583T-L-3-3/TR TO-263-5 OBS
SPX1583T/TR TO-263-5 OBS
SPX1583T5 TO-263-5 0 125 OBS
SPX1583T5-1-5 TO-263-5 OBS
SPX1583T5-1-5/TR TO-263-5 OBS
SPX1583T5-1-8 TO-263-5 OBS
SPX1583T5-1-8/TR TO-263-5 OBS
SPX1583T5-2-5 TO-263-5 0 125 OBS
SPX1583T5-2-5/TR TO-263-5 0 125 OBS
SPX1583T5-2-8 TO-263-5 OBS
SPX1583T5-2-85 TO-263-5 OBS
SPX1583T5-2-85/TR TO-263-5 OBS
SPX1583T5-3-3 TO-263-5 0 125 OBS
SPX1583T5-3-3/TR TO-263-5 OBS
SPX1583T5-5-0 TO-263-5 OBS
SPX1583T5-5-0/TR TO-263-5 OBS
SPX1583T5-L TO-263-5 0 125 OBS SPX1582T5-L/TR
SPX1583T5-L-1-5 TO-263-5 0 125 OBS
SPX1583T5-L-1-5/TR TO-263-5 0 125 OBS
SPX1583T5-L-1-8 TO-263-5 0 125 OBS
SPX1583T5-L-1-8/TR TO-263-5 0 125 OBS
SPX1583T5-L-2-5 TO-263-5 0 125 OBS
SPX1583T5-L-2-5/TR TO-263-5 0 125 OBS
SPX1583T5-L-2-8 TO-263-5 0 125 OBS
SPX1583T5-L-2-8/TR TO-263-5 0 125 OBS
SPX1583T5-L-2-85 TO-263-5 0 125 OBS
SPX1583T5-L-2-85/TR TO-263-5 0 125 OBS
SPX1583T5-L-3-0 TO-263-5 0 125 OBS
SPX1583T5-L-3-0/TR TO-263-5 0 125 OBS
SPX1583T5-L-3-3 TO-263-5 0 125 OBS
SPX1583T5-L-3-3/TR TO-263-5 0 125 OBS
SPX1583T5-L-5-0 TO-263-5 0 125 OBS
SPX1583T5-L-5-0/TR TO-263-5 0 125 OBS
SPX1583T5-L/TR TO-263-5 0 125 OBS SPX1582T5-L/TR
SPX1583T5/TR TO-263-5 0 125 OBS
SPX1583U TO-220-5 OBS
SPX1583U-1-5 TO-220-5 OBS
SPX1583U-2-5 TO-220-5 OBS
SPX1583U-3-0 TO-220-5 OBS
SPX1583U-3-3 TO-220-5 OBS
SPX1583U5 TO-220-5 OBS
SPX1583U5-1-5 TO-220-5 OBS
SPX1583U5-1-8 TO-220-5 OBS
SPX1583U5-2-5 TO-220-5 OBS
SPX1583U5-2-8 TO-220-5 OBS
SPX1583U5-2-85 TO-220-5 OBS
SPX1583U5-3-3 TO-220-5 OBS
SPX1583U5-5-0 TO-220-5 OBS
SPX1583U5-L TO-220-5 OBS
SPX1583U5-L-1-5 TO-220-5 OBS
SPX1583U5-L-1-8 TO-220-5 OBS
SPX1583U5-L-2-5 TO-220-5 OBS
SPX1583U5-L-2-8 TO-220-5 OBS
SPX1583U5-L-2-85 TO-220-5 OBS
SPX1583U5-L-3-3 TO-220-5 OBS
SPX1583U5-L-5-0 TO-220-5 OBS
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Packaging

Pkg Code Details Quantities Dimensions
TO-220-5
  • JEDEC Reference: TS-001
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 29.3ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: n/a
  • Quantity per Tube: 50
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: inch
  • Length: 0.370 max
  • Width: 0.415 max
  • Thickness: 0.190 max
  • Lead Pitch: 0.067
TO-263-5
  • JEDEC Reference: TO-263
  • MSL Pb-Free: L3 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 31.2ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 500
  • Quantity per Tube: 50
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 24 x 16
  • Tape & Reel Unit Orientation: Tab away from sprocket hole.
  • Dimensions: inch
  • Length: 0.380 max
  • Width: 0.420 max
  • Thickness: 0.190
  • Lead Pitch: 0.067

Notifications

Distribution Date Description File
07/17/2023 In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. ADDENDUM A: Fixed MBB label logo for DX204001 to MaxLinear logo. ADDENDUM B: Replaced ‘All other affected products outer box label’ with clearer pictures. Corrected Date Issued (from original PCN) issue date +90 days to August 30, 2023.
06/01/2023 In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability.
06/01/2023 In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. ADDENDUM: Fixed MBB label logo for DX204001 to MaxLinear logo.
07/26/2016 Product discontinuation notification. Discontinued.
12/22/2015 Alternate assembly site Addition of an alternate assembly supplier Nantong Fujitsu (China).
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site

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Yes. Try our Excel-based heat calculation spreadsheet ANP-03, Thermal Calculator
 
For further study, this spreadsheet is mentioned in the following helpful application note: ANP-02, Thermal Considerations for Linear Regulators 
  

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