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MaxLinear, Inc. SPX1117M3-L-3-3/TR
- Part No.:
- SPX1117M3-L-3-3/TR
- Manufacturer:
- MaxLinear, Inc.
- Package:
- TO-261-4, TO-261AA
- Description:
- IC REG LINEAR 3.3V 800MA SOT223
- Quantity:
Unit Price:$0
Ext Price:$0
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- Shipping:
Product Details
SPX1117M3-L-3-3/TR - 3.3 V, 800 mA Low-Dropout Regulator
MaxLinear SPX1117M3-L-3-3/TR is a fixed 3.3 V positive linear regulator in a three-pin SOT-223 package, specified for up to 800 mA continuous output with appropriate thermal design.
Electrical limits, ordering status, pin assignment, package, and packing method were checked against MaxLinear's current SPX1117 product page and official data sheet.
Overview
The SPX1117M3-L-3-3/TR generates a fixed 3.3 V rail from a higher positive supply. It combines an 800 mA guaranteed output rating with current limiting and thermal protection in the SOT-223 format. MaxLinear identifies this exact order code as active, lead-free, and supplied on tape and reel.
Key Advantages
Fixed 3.3 V output
The fixed version needs no external resistor divider to set the nominal rail.
800 mA rating
The regulator supports moderate-load point-of-use rails when heat is managed.
Integrated protection
Internal overcurrent limiting and thermal protection simplify fault handling.
Simple stabilization
MaxLinear specifies stability with a 2.2 microfarad ceramic output capacitor for most applications.
Feature Summary
Low-dropout operation
Typical dropout is 1.1 V at 800 mA; the documented maximum is 1.3 V.
Tight 25-degree output
The 3.3 V option is specified from 3.267 V to 3.333 V at 25 degrees C.
Wide junction range
The orderable device is specified from -40 degrees C to +125 degrees C junction temperature.
SOT-223 power package
The output-connected tab provides a low-impedance electrical and thermal path to the PCB.
Package & Footprint
MaxLinear specifies SPX1117M3-L-3-3/TR in a three-pin SOT-223 package. The catalog's original `TO-261-4, TO-261AA` description refers to the same JEDEC-style package family; the registered package image uses TO-261-4.
- Use the current MaxLinear SOT-223 drawing and confirm the top-view pin order.
- Treat the large tab as VOUT electrically; do not connect it to ground.
- Use adequate output-connected copper to spread heat.
- Keep input and output capacitors close to the regulator return path.
The package JPG is checked locally and in production before publication.
Pin Functions
The fixed-output SOT-223 assignment below follows MaxLinear's top-view diagram.
The exposed tab is VOUT. Verify this connection when comparing footprints or substitutes.
Key Specifications
| Manufacturer | MaxLinear, Inc. |
|---|---|
| Regulator type | Fixed positive low-dropout linear regulator |
| Nominal output | 3.3 V |
| Output at 25 degrees C | 3.267 V minimum, 3.300 V typical, 3.333 V maximum |
| Output over full stated range | 3.234 V minimum, 3.366 V maximum under the specified line and load conditions |
| Continuous output current | 800 mA guaranteed with adequate thermal design |
| Peak current | 1 A guaranteed |
| Input supply absolute maximum | 20 V |
| Dropout at 800 mA | 1.1 V typical, 1.3 V maximum |
| Quiescent current | 5 mA typical, 10 mA maximum |
| Load regulation | 6 mV typical, 12 mV maximum from 5 mA to 800 mA |
| Ripple rejection | 60 dB minimum, 75 dB typical at 120 Hz under the stated condition |
| Operating junction temperature | -40 degrees C to +125 degrees C |
| Package and packing | SOT-223-3 / TO-261-4 family, tape and reel |
Unless otherwise stated, the MaxLinear electrical table uses 10 microfarad input and output capacitors. Fixed-output minimum input is defined as VOUT plus 1.5 V for the specified tests.
Replacement Considerations
A replacement must preserve the fixed 3.3 V output, required current, SOT-223 footprint, GND/VOUT/VIN pin order, output-connected tab, dropout limit, capacitor stability, protection behavior, and temperature range. Verify thermal performance on the actual PCB rather than assuming all SOT-223 regulators are interchangeable.
No internal replacement link is asserted without an exact API-confirmed catalog match and engineering review.
Manufacturer Information
MaxLinear lists SPX1117M3-L-3-3/TR as an active SPX1117 orderable part. M3 identifies the SOT-223 package, L identifies the lead-free option, 3-3 identifies the fixed 3.3 V output, and TR identifies tape-and-reel packing. The manufacturer's quality table lists moisture-sensitivity level 1 with a 260-degree C peak reflow rating.
Applications
Point-of-load rails
Create a local 3.3 V supply near digital or mixed-signal circuitry.
Computer hardware
Support moderate-current rails in desktop, server, graphics, and peripheral designs.
Industrial equipment
Regulate auxiliary rails where the input headroom and thermal budget are suitable.
General power supplies
Provide a simple protected fixed-voltage stage from a higher DC rail.
Quality & Authenticity
Confirm the exact SPX1117M3-L-3-3/TR order code, package marking, SOT-223 dimensions, reel label, lead finish, and lot traceability during incoming inspection. Package appearance alone does not establish authenticity. Electrical sampling should use the latest MaxLinear test limits.
FAQ
What output does SPX1117M3-L-3-3/TR provide?
It is the fixed 3.3 V member of the SPX1117 family.
Can it continuously deliver 800 mA?
Only when the input voltage, PCB copper, ambient temperature, and resulting junction temperature remain within limits.
What is the SOT-223 pin order?
For the fixed version in top view, pin 1 is GND, pin 2 is VOUT, and pin 3 is VIN; the tab is also VOUT.
What output capacitor is recommended?
MaxLinear states that 10 microfarads provides unconditional stability and 2.2 microfarads is sufficient for most applications.
What does /TR mean?
It identifies tape-and-reel packing for this active lead-free SOT-223 order code.
Engineering Notice
Validate dropout margin, startup and load transients, capacitor value and effective capacitance, output-tab routing, and junction temperature in the final design. Power dissipation rises approximately with (VIN minus 3.3 V) multiplied by load current, so the thermal limit can dominate well below the absolute input rating.
SPX1117M3-L-3-3/TR Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- MaxLinear, Inc.
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 800mA
- Current - Output:
- 800mA
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
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