1. Products
  2. Power Management
  3. LDO Linear Regulators
  4. Positive Linear Regulators (LDO)
  5. HMC976

Alternative Parts


Features and Benefits

  • High Current 400mA
  • Low Dropout: 300mV at 400mA Output
  • Ultra Low Noise: 3nV/√Hz at 10 kHz, 6nV/√Hz at 1 kHz
  • High Power Supply Rejection Ratio(PSRR): <60 dB at 1 kHz, <30 dB at 1 MHz
  • Adjustable Voltage Output: VR 1.8 to 5V at 400mA
  • Works with Low ESR Ceramic Capacitors
  • Low Power-Down Current: <1 μA
  • Thermal Protection
  • 16 Lead 3 x 3 mm SMT Package: 9 mm²

Product Details

The HMC976LP3E is a BiCMOS ultra low noise linear voltage regulator. The high Power Supply Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz range provides excellent rejection of any preceding switching regulator or other power supply noise. The voltage output is ideal for frequency generation subsystems including Hittite’s broad line of PLLs with integrated VCOs. The output voltage can be adjusted lower than the default value by using one external resistor.

The output can be set to 5V by grounding the HV pin. The regulator can be powered down by the TTL-compatible Enable input. The HMC976LP3E is housed in a 3x3mm QFN SMT package.


  • Test Instrumentation
  • Military Radios, Radar and ECM
  • Basestation Infrastructure
  • Ultra Low Noise Frequency Generation
  • Fractional-N Synthesizer Supply
  • Mixed-Signal Circuit Supply

Product Lifecycle icon-not-recommended Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Evaluation Kits (1)

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
HMC976LP3E Material Declaration Reliability Data 16-Lead QFN (3mm x 3mm w/ EP)
HMC976LP3ETR Material Declaration Reliability Data 16-Lead QFN (3mm x 3mm w/ EP)
Wafer Fabrication Data

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Lead Times

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.