SPX3819

500mA Low-Noise LDO Voltage Regulator
Data Sheet

Description

The SPX3819 is a positive voltage regulator with a low dropout voltage and low noise output. In addition, this device offers a very low ground current of 800μA at 100mA output. The SPX3819 has an initial tolerance of less than 1% max and a logic compatible on/off switched input. When disabled, power consumption drops to nearly zero. Other key features include reverse battery protection, current limit and thermal shutdown. The SPX3819 includes a reference bypass pin for optimal low noise output performance. With its very low output temperature coefficient, this device also makes a superior low power voltage reference.

The SPX3819 is an excellent choice for use in battery powered applications such as cordless telephones, radio control systems and portable computers. It is available in several fixed output voltage options or with an adjustable output voltage.

This device is offered in 8-pin NSOIC, 8-pin DFN and 5-pin SOT-23 packages.

Features

  • Low noise: 40µV possible
  • High accuracy: 1%
  • Reverse battery protection
  • Low dropout: 340mV at full load
  • Low quiescent current: 90µA
  • Zero off-mode current
  • Fixed output: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
  • 5-pin SOT-23, 8-pin nSOIC and 8-pin 2 x 3 DFN packages

Application

Design Tools

Symbols & Footprints

Packaging

Pkg Code Details Quantities Dimensions PDF
DFN8 2x3
  • JEDEC Reference: MO-229
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 59ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 2
  • Width: 3
  • Thickness: 1.00
  • Lead Pitch: 0.5
NSOIC8
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 128.4ºC/W (std); 96.8ºC/W (fused)
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 98
  • Quantity per Reel: 2500
  • Quantity per Tube: 98
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27
SOT-223-3
  • JEDEC Reference: TO-261
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 62.3ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 78
  • Quantity per Reel: 2500
  • Quantity per Tube: 78
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Heatsink by sprocket hole
  • Dimensions: mm
  • Length: 6.50
  • Width: 3.50
  • Thickness: 1.80
  • Lead Pitch: 2.30
SOT-23-5
  • JEDEC Reference: MO-178
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 191ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 180 x 8 x 12
  • Tape & Reel Unit Orientation: 3 Pins at sprocket hole.
  • Dimensions: mm
  • Length: 2.90
  • Width: 1.60
  • Thickness: 1.45
  • Lead Pitch: 0.95
TO-220-3
  • JEDEC Reference: TO-220
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 29.4ºC/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: 0.355 max
  • Width: 0.420 max
  • Thickness: 0.190 max
  • Lead Pitch: 0.10
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

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
SPX3819A1-3-3 DFN8 2x3 OBS
SPX3819A1-3-3/TR DFN8 2x3 OBS
SPX3819A1-L-3-3 DFN8 2x3 OBS
SPX3819M3-1-8 SOT-223-3 OBS
SPX3819M3-3-0 SOT-223-3 OBS
SPX3819M3-3-1 SOT-223-3 OBS
SPX3819M3-3-3 SOT-223-3 OBS
SPX3819M3-L-1-8 SOT-223-3 OBS
SPX3819M3-L-3-0 SOT-223-3 OBS
SPX3819M3-L-3-1 SOT-223-3 OBS
SPX3819M3-L-3-3 SOT-223-3 OBS
SPX3819M5 SOT-23-5 -40 125 OBS
SPX3819M5/TR SOT-23-5 -40 125 OBS
SPX3819M5-1-2 SOT-23-5 -40 125 OBS
SPX3819M5-1-2/TR SOT-23-5 -40 125 OBS
SPX3819M5-1-5 SOT-23-5 OBS
SPX3819M5-1-5/TR SOT-23-5 -40 125 OBS
SPX3819M5-1-8 SOT-23-5 -40 125 OBS
SPX3819M5-1-8/TR SOT-23-5 -40 125 OBS
SPX3819M5-2-5 SOT-23-5 -40 125 OBS
SPX3819M5-2-5/TR SOT-23-5 -40 125 OBS
SPX3819M5-2-5/TRR SOT-23-5 -40 125 OBS
SPX3819M5-3-0 SOT-23-5 -40 125 OBS
SPX3819M5-3-0/TR SOT-23-5 -40 125 OBS
SPX3819M5-3-1 SOT-23-5 OBS
SPX3819M5-3-1/TR SOT-23-5 OBS
SPX3819M5-3-3 SOT-23-5 -40 125 OBS
SPX3819M5-3-3/TR SOT-23-5 -40 125 OBS
SPX3819M5-5-0 SOT-23-5 -40 125 OBS
SPX3819M5-5-0/TR SOT-23-5 -40 125 OBS
SPX3819M5-L SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L/TR
SPX3819M5-L/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-1-2 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L-1-2/TR
SPX3819M5-L-1-2/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-1-5 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L-1-5/TR
SPX3819M5-L-1-5/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-1-8 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L-1-8/TR
SPX3819M5-L-1-8/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-2-5 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L-2-5/TR
SPX3819M5-L-2-5/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-3-0 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L-3-0/TR
SPX3819M5-L-3-0/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-3-1 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L
SPX3819M5-L-3-1/TR SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L/TR
SPX3819M5-L-3-3 SOT-23-5 -40 125 OBS Order
SPX3819M5-L-3-3/TR SOT-23-5 -40 125 Active Order
SPX3819M5-L-5-0 SOT-23-5 -40 125 OBS Suggested:
SPX3819M5-L-5-0/TR
SPX3819M5-L-5-0/TR SOT-23-5 -40 125 Active Order
SPX3819R2 DFN8 2x3 OBS
SPX3819R2-1-2 DFN8 2x3 -40 125 OBS
SPX3819R2-1-2/TR DFN8 2x3 OBS
SPX3819R2-1-5 DFN8 2x3 OBS
SPX3819R2-1-5/TR DFN8 2x3 OBS
SPX3819R2-1-8 DFN8 2x3 OBS
SPX3819R2-1-8/TR DFN8 2x3 OBS
SPX3819R2-2-5 DFN8 2x3 OBS
SPX3819R2-2-5/TR DFN8 2x3 OBS
SPX3819R2-3-0 DFN8 2x3 OBS
SPX3819R2-3-1 DFN8 2x3 OBS
SPX3819R2-3-3 DFN8 2x3 OBS
SPX3819R2-3-3/TR DFN8 2x3 OBS
SPX3819R2-5-0 DFN8 2x3 OBS
SPX3819R2-L DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L/TR
SPX3819R2-L/TR DFN8 2x3 -40 125 Active Order
SPX3819R2-L-1-2 DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L-1-2/TR
SPX3819R2-L-1-2/TR DFN8 2x3 -40 125 Active Order
SPX3819R2-L-1-5 DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L
SPX3819R2-L-1-5/TR DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L/TR
SPX3819R2-L-1-8 DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L-1-8/TR
SPX3819R2-L-1-8/TR DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L/TR
SPX3819R2-L-2-5 DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L
SPX3819R2-L-2-5/TR DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L/TR
SPX3819R2-L-3-0 DFN8 2x3 OBS
SPX3819R2-L-3-1 DFN8 2x3 OBS
SPX3819R2-L-3-3 DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L
SPX3819R2-L-3-3/TR DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L/TR
SPX3819R2-L-5-0 DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L
SPX3819R2-L-5-0/TR DFN8 2x3 -40 125 OBS Suggested:
SPX3819R2-L/TR
SPX3819S NSOIC8 -40 125 OBS
SPX3819S/TR NSOIC8 OBS
SPX3819S-1-8 NSOIC8 -40 125 OBS
SPX3819S-1-8/TR NSOIC8 OBS
SPX3819S-2-5 NSOIC8 -40 125 OBS
SPX3819S-2-5/TR NSOIC8 -40 125 OBS
SPX3819S-3-0 NSOIC8 OBS
SPX3819S-3-0/TR NSOIC8 OBS
SPX3819S-3-1 NSOIC8 OBS
SPX3819S-3-1/TR NSOIC8 OBS
SPX3819S-3-3 NSOIC8 -40 125 OBS
SPX3819S-3-3/TR NSOIC8 OBS
SPX3819S-5-0 NSOIC8 -40 125 OBS
SPX3819S-5-0/TR NSOIC8 OBS
SPX3819S-L NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L/TR NSOIC8 -40 125 Active Order
SPX3819S-L-1-2 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L-1-2/TR
SPX3819S-L-1-2/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-1-5 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L-1-5/TR
SPX3819S-L-1-5/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-1-8 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L-1-8/TR
SPX3819S-L-1-8/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-2-5 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L-2-5/TR
SPX3819S-L-2-5/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-3-0 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L
SPX3819S-L-3-0/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-3-1 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L
SPX3819S-L-3-1/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-3-3 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L-3-3/TR
SPX3819S-L-3-3/TR NSOIC8 -40 125 OBS Suggested:
SPX3819S-L/TR
SPX3819S-L-5-0 NSOIC8 -40 125 OBS Suggested:
SPX3819S-L-5-0/TR
SPX3819S-L-5-0/TR NSOIC8 -40 125 Active Order
SPX3819T5-1-8 TO-263-5 OBS
SPX3819T5-1-8/TR TO-263-5 OBS
SPX3819T5-3-0 TO-263-5 OBS
SPX3819T5-3-1 TO-263-5 OBS
SPX3819T5-3-3 TO-263-5 OBS
SPX3819T5-3-3/TR TO-263-5 OBS
SPX3819T5-L-1-8 TO-263-5 OBS
SPX3819T5-L-3-0 TO-263-5 OBS
SPX3819T5-L-3-1 TO-263-5 OBS
SPX3819T5-L-3-3 TO-263-5 OBS
SPX3819U TO-220-3 OBS
SPX3819U-1-8 TO-220-3 OBS
SPX3819U-2-5 TO-220-3 OBS
SPX3819U-3-0 TO-220-3 OBS
SPX3819U-3-1 TO-220-3 OBS
SPX3819U-3-3 TO-220-3 OBS
SPX3819U-5-0 TO-220-3 OBS
SPX3819U-L TO-220-3 OBS
SPX3819U-L-1-8 TO-220-3 OBS
SPX3819U-L-2-5 TO-220-3 OBS
SPX3819U-L-3-0 TO-220-3 OBS
SPX3819U-L-3-1 TO-220-3 OBS
SPX3819U-L-3-3 TO-220-3 OBS
SPX3819U-L-5-0 TO-220-3 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.

Quality & Environmental Data

Part Number RoHS | Exempt RoHS Halogen Free REACH MSL Rating / Peak Reflow Package
SPX3819R2-L/TR N Y Y Y L1 / 260ᵒC DFN8 2x3
SPX3819R2-L-1-2/TR N Y Y Y L1 / 260ᵒC DFN8 2x3
SPX3819M5-L-5-0/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819S-L-5-0/TR N Y Y Y L1 / 260ᵒC NSOIC8
SPX3819S-L/TR N Y Y Y L1 / 260ᵒC NSOIC8
SPX3819M5-L-1-2/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819M5-L-1-5/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819M5-L-1-8/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819M5-L-2-5/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819M5-L-3-0/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819M5-L-3-3/TR N Y Y Y L1 / 260ᵒC SOT-23-5
SPX3819M5-L/TR N Y Y Y L1 / 260ᵒC SOT-23-5

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please contact customersupport@maxlinear.com.
Distribution Date Description File
09/16/2018 The SPX3819 datasheet has been revised to correct the ESD Rating. The correct value: ESD Rating (HBM) ...1kV
02/16/2018 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L. Addendum: Remove SOT-89 parts from affected products list.
07/11/2017 Product Discontinuation Notification
02/15/2017 Qualification of alternate assembly subcon, ANST.
01/27/2017 Qualification of alternate assembly subcon, ANST, China.
01/12/2017 Standard tape and reel quantity will change from 2500 pieces to 3000 pieces for SOT23-3L/5L/6L.
10/06/2016 Qualification of alternate assembly subcon, JCET.
07/26/2016 Product discontinuation notification. Discontinued.
04/13/2016 Qualification of alternate assembly subcon, JCET.
08/29/2014 Alternate Assembly Site. Addition of JCET for assembly using copper wire or gold wire bonding and standard reel quantity changing from 2500 to 3000 pieces.
10/04/2013 Addition of an alternate qualified assembly site, UTAC Thailand, for assembly using copper or gold wire bonding. Material change and alternate assembly site.
07/30/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for SOT23 package using copper wire bonding. Material Change.
07/02/2013 Qualification of an alternate qualified assembly supplier, ASE Chung-Li (Taiwan) for the 8L NSOIC package using copper wire bonding. Material change and alternate assembly supplier qualified.
09/29/2011 Product marking change for products in 2x3mm, 8ld DFN. To improve product traceability.
12/07/2009 Enhancement of NSOIC 8, NSOIC14 and NSOIC16 packages to Green (halogen-free) via Mold Compound & Die Attach Material. Enhance packages to be Green (halogen-free).
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand
08/12/2008 Datasheet Change: Line Regulation Product Re-Characterization.
12/05/2007 Announcing the re-activation of previously announced discontinued products The previously announced discontinued products listed above are being re-activated due to continuing Customer 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

Frequently Asked Questions

The SPX3819 data sheet contains a graph of ground current vs load current for your review.
 
Also we suggest that you download the Thermal Considerations application note which includes a few example calculations from the SPX3819: ANP-02, Thermal Considerations for Linear Regulators
 
The Linear Regulator Heat Calculator could also prove helpful: ANP-03, Thermal Calculator
 
Customer bench testing is strongly recommended using intended application circuit to ensure proper operation. 

Input and output capacitance may be increased without limit.

If the bypass pin is to be used, a 10nF ceramic capacitor is suggested. You may also use the value / type mentioned. The only concern with the bypass feature is that startup time is increased. If startup time is a concern then the bypass pin should be kept open. Different values of bypass capacitors will result in different startup times.

This is a little difficult to answer without knowing how the LED will be modulated. If the enable input is used for modulation it is possible that the device may not react fast enough to provide an output. This is very true if the Bypass pin is used. If the output load exceeds the current limit trip point, then the output will be turned off to protect the device. However if the output is always on and modulation is done with some external circuitry, then adding extra capacitance to the output could satisfy the current demand of the LED so as not to cause current limit activation.

The best way to determine this is to go to maxlinear.com and type the part into the search function. At or near the top of the results you should see something that looks like:
 
 
 

In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:

 
 
 

Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:

 
 
 

Notice the status column and the “Show obsolete parts” link.  A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:

 
 
 

Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:

 
 
 

And then Product Change Notifications:

 
  
 

Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:

 
 
 

If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.

Ceramic capacitors may be used for this part. For Tantalum or Aluminum Electrolytic types, keep the Equivalent Series Resistance (ESR) as small as possible.

A small common mode choke would be best for filtering this ripple. Variations / combinations of input capacitance might also help but bench testing would be required.

The datasheet does not state that this device is operable in a pre-biased output condition; therefore, leakage may occur.

If the input voltage is above dropout voltage then the part will regulate for the entire output current range up to 500mA.

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