Small 3A, Low-Dropout Linear Regulator in a 2.7mm × 1.6mm Package

3A Linear Regulator with Lowest Dropout and Smallest Package on the Market

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The MAX15103 is a small, low-dropout linear regulator optimized for networking, datacom, and server applications. The regulator delivers up to 3A from a 1.7V to 5.5V input supply with output accuracy of ±1.6%. The output is adjustable down to 0.6V with a guaranteed dropout voltage of less than 200mV at full load. The internal p-channel switch is protected with a foldback current limit and thermal shutdown.

The MAX15103 features an external bypass input to reduce noise. This bypass input also serves as a soft-start control. An enable input and power-good output are included for power sequence control.

The MAX15103 is available in a 1.6mm × 2.7mm WLP package and is fully specified from the -40°C to +85°C operating temperature range.

MAX15103: Functional Diagram MAX15103: Functional Diagram Enlarge+

Key Features

  • 1.7V to 5.5V Operating Range
  • 200mV Dropout Guaranteed at 3A
  • ±1.6% Output Accuracy Over Line, Load, and Temperature
  • Adjustable Output from 0.6V to 5.2V
  • Foldback Current Protection
  • Thermal Shutdown Protection
  • Low Noise 15µVRMS (typ)
  • Small 1.6mm × 2.7mm WLP Package


  • Base Stations
  • Networking
  • PLL Power
  • Servers
  • Telecom/Datacom

See parametric specs for Linear Regulators (133)

Part NumberRegulatorsVIN
Output Voltage Noise
(µV RMS)
Ref. BypassLow Batt./ Pwr. Fail OutPOK/Reset Thresh.
WatchdogOper. Temp.
minmaxminmaxtypmaxtypnomSee Notes
MAX15103 to +85
$2.03 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX15101EVKIT: Evaluation Kit for the MAX15101, MAX15102, and MAX15103.
MAX15102EVKIT: Evaluation Kit for the MAX15101, MAX15102, and MAX15103.
MAX15103EVKIT: Evaluation Kit for the MAX15101, MAX15102, and MAX15103.
Product Reliability Reports: MAX15103.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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