LD39100   Product is in volume production.

1 A low quiescent current low noise voltage regulator

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The LD39100 provides 1 A maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. The device is stable with ceramic capacitors on the input and output. The ultra-low dropout voltage, low quiescent current and low-noise features make it suitable for low power battery-powered applications. Power supply rejection is 70 dB at low frequency and starts to roll off at 10 kHz. Enable logic control function puts the LD39100 in shutdown mode, allowing a total current consumption lower than 1 µA. The device also includes short-circuit constant current limiting and thermal protection. LD39100 is available also in AEC-Q100 qualified version, in the DFN6 (3x3 mm) with wettable flank package.

Key Features

  • AEC-Q100 qualified
  • Input voltage from 1.5 to 5.5 V
  • Ultra-low dropout voltage (200 mV typ. at 1 A load)
  • Very low quiescent current (20 µA typ. at no load, 200 µA typ. at 1 A load, 1 µA max. in off mode)
  • Very low-noise with no bypass capacitor (30 µ VRMS at VOUT = 0.8 V)
  • Output voltage tolerance: ±2.0% at 25 °C
  • 1 A guaranteed output current
  • Wide range of output voltages available on request: 0.8 V to 4.5 V with 100 mV step and adjustable from 0.8 
  • Logic-controlled electronic shutdown
  • Stable with ceramic capacitors COUT = 1 µF
  • Internal current and thermal limit
  • DFN6 (3x3 mm) package
  • Temperature range: -40 °C to 125 °C

Resources

Technical Documentation

Product Specifications
Description Version Size
DS6257 DS6257: 1 A, low quiescent current, low-noise voltage regulator 7.0 1 MB

Publications and Collaterals

Selection Guides
Description Version Size
Linear and Switching Voltage Regulators Selection Guide 3.0 370 KB
Brochures
Description Version Size
Brochure Power management guide 10.2018 4 MB
Low-dropout (LDO) linear voltage regulators - Quick Reference Guide 2.0 216 KB
Power management for handheld and portable 2.0 1 MB
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Sample & Buy

Part Number Package Packing Type Output Voltage (V) (nom) Output Tolerance (typ) Output Current (A) (nom) Marketing Status Unit Price (US$) * Quantity ECCN (US) Country of Origin More info Order from ST Order from Distributors
LD39100PU12R DFN6 3x3 Tape And Reel 1.2 2 1 Active 0.834 1000 EAR99 MALAYSIA MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PURY DFN6 3x3 Tape And Reel - 2 1 Active 0.834 1000 EAR99 THAILAND MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PU30R DFN6 3x3 Tape And Reel 3 2 1 Preview 0.834 1000 EAR99 - MORE INFO No availability reported, please contact our Sales office
LD39100PU33RY DFN6 3x3 Tape And Reel 3.3 2 1 Active 0.834 1000 EAR99 THAILAND MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PU25RY DFN6 3x3 Tape And Reel 2.5 2 1 Active 0.834 1000 EAR99 THAILAND MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PU25R DFN6 3x3 Tape And Reel 2.5 2 1 Preview 0.834 1000 EAR99 - MORE INFO No availability reported, please contact our Sales office
LD39100PU18RY DFN6 3x3 Tape And Reel 1.8 2 1 Active 0.834 1000 EAR99 THAILAND MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PU18R DFN6 3x3 Tape And Reel 1.8 2 1 Preview 0.834 1000 EAR99 - MORE INFO No availability reported, please contact our Sales office
LD39100PU12RY DFN6 3x3 Tape And Reel 1.2 2 1 Active 0.834 1000 EAR99 THAILAND MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PUR DFN6 3x3 Tape And Reel - 2 1 Active 0.834 1000 EAR99 MALAYSIA MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LD39100PU33R DFN6 3x3 Tape And Reel 3.3 2 1 Active 0.834 1000 EAR99 MALAYSIA MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LD39100PU12R ActiveDFN6 3x3IndustrialEcopack2
LD39100PURY ActiveDFN6 3x3AutomotiveEcopack2 0 0
LD39100PU30R PreviewDFN6 3x3IndustrialEcopack2
LD39100PU33RY ActiveDFN6 3x3AutomotiveEcopack2 0 0
LD39100PU25RY ActiveDFN6 3x3AutomotiveEcopack2
LD39100PU25R PreviewDFN6 3x3IndustrialEcopack2
LD39100PU18RY ActiveDFN6 3x3AutomotiveEcopack2 0 0
LD39100PU18R PreviewDFN6 3x3IndustrialEcopack2
LD39100PU12RY ActiveDFN6 3x3AutomotiveEcopack2 0 0
LD39100PUR ActiveDFN6 3x3IndustrialEcopack2 0 0
LD39100PU33R ActiveDFN6 3x3IndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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