1. Products
  2. Power Management
  3. LDO Linear Regulators
  4. Positive Linear Regulators (LDO)
  5. MAX38904B


Features and Benefits

  • Delivers Flexible Operating Range
    • 1.7V to 5.5V Input Voltage Range
    • 0.6V to 5.0V Programmable Output Voltage
    • 2A Maximum Output Current
    • 100mV Maximum Dropout at 2A Load
    • < 1.5µA Shutdown Supply Current
  • Reduces Noise and Improves Accuracy
    • ±1% DC Accuracy Over Load, Line, and Temperature
    • 5.1μVRMS Output Noise, 10Hz to 100kHz
    • 1.3mA Quiescent Supply Current
    • > 70dB PSRR at 10kHz
  • Enables Ease-of-Use and Robust Protection
    • Active Discharge of 70Ω at OUT
    • Stable with 8µF (Min) Output Capacitance
    • Programmable Soft-Start Rate
    • Overcurrent and Overtemperature Protection
    • Output-to-Input Reverse Current Protection
    • Power-OK Status Pin
  • Reduces Size, Improves Reliability
    • 3mm x 3mm 14-pin TDFN Package and 2.2mm x 1.37mm, 5 x 3 Bump, 0.4mm Pitch WLP
    • -40°C to 125°C Operating Temperature

Product Details

The MAX38904 is a 1.7V–5.5V VIN, low-noise linear regulator that delivers up to 2A of output current with only 5.1µVRMS of output noise from 10Hz to 100kHz. The regulator maintains ±1% output accuracy over a wide input voltage range, requiring only 100mV of input-to-output headroom at full load. The 1.3mA no-load supply current is independent of dropout voltage. The MAX38904A/B/C/D have a 70Ω active discharge feature to quickly discharge output capacitors.

The output voltage on MAX38904B can be adjusted to a value in the range of 0.6V to 5.0V by using two external resistors. The MAX38904B also includes an active-high POK signal for trouble-free load startup.

The MAX38904A has nine pin-selectable output voltages 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V.

The wafer-level package (WLP) versions of the MAX38904 are available as C and D variants. The MAX38904C uses external feedback resistors for adjusting the output voltage, while the MAX38904D has factory preset output voltages over the range of 0.7V to 5.0V in 50mV steps.

All versions include a programmable output soft-start rate, output overcurrent, and thermal overload protection.

The MAX38904A/B are offered in a 3mm x 3mm, 14-pin TDFN package, while the MAX38904C/D are available in 5 x 3 bump, 2.2mm x 1.37mm WLP, 0.4mm pitch.


  • Communication Systems, Test Equipment, Medical Equipment
  • High-End Audio Systems
  • High-Resolution Data Acquisition Systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (4)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX38904BATD+ Material Declaration Reliability Data Thin Dual Flatpack No Leads
MAX38904BATD+T Material Declaration Reliability Data Thin Dual Flatpack No Leads
Wafer Fabrication Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.