LDF   Product is in volume production.

1A Very low drop voltage regulator IC

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The LDF is a fast, very low drop linear regulator which operates from an input supply voltage in the range of 2.6 V to 16 V.

It is available in fixed and adjustable output voltage versions, from 0.8 V to 12 V.

The LDF features are: high output precision, very low-dropout voltage, low noise, and low quiescent current, therefore suitable for low voltage microprocessors and memory applications.

Enable logic control pin and power-good output are featured on PPAK/DFN packages.

Current and thermal protection are provided.

Key Features

  • Input voltage from 2.6 to 16 V
  • Very low-dropout voltage (500 mV max. at 1 A load)
  • Low quiescent current (200 μA typ. @ 1 A load)
  • Available in 1% precision in PPAK and DFN6 packages, 2% in DPAK
  • 1 A guaranteed output current
  • Wide range of output voltages available on request: adjustable from 0.8 V, fixed up to 12 V in 100 mV steps
  • Logic-controlled electronic shutdown
  • Power Good (PPAK and DFN packages)
  • Fast dynamic response to line and load changes
  • Internal current and thermal protections
  • Temperature range: -40 °C to 125 °C

Resources

Technical Documentation

Product Specifications
Description Version Size
DS10028 DS10028: 1 A very low drop voltage regulator 2.0 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 2.2 216 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
LDFPT-TR PPACK 5 Tape And Reel - 1 1 Active 0.476 1000 EAR99 CHINA MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LDFPVR DFN6 2x2 Tape And Reel - 1 1 Active 0.476 1000 EAR99 CHINA MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LDFPUR DFN6 3x3 Tape And Reel - 1 1 Active 0.476 1000 EAR99 CHINA MORE INFO Free Sample Add to cart DISTRIBUTOR AVAILABILITY
LDF33PT-TR PPACK 5 Tape And Reel 3.3 1 1 Active 0.549 1000 EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
LDF25PT-TR PPACK 5 Tape And Reel 2.5 1 1 Active 0.549 1000 EAR99 CHINA MORE INFO No availability reported, please contact our Sales office
LDF18PT-TR PPACK 5 Tape And Reel 1.8 1 1 Active 0.549 1000 EAR99 CHINA MORE INFO No availability reported, please contact our Sales office
LDF33DT-TR DPAK Tape And Reel 3.3 2 1 Active 0.549 1000 EAR99 CHINA 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**
LDFPT-TR ActivePPACK 5IndustrialEcopack2 0 0
LDFPVR ActiveDFN6 2x2IndustrialEcopack2
LDFPUR ActiveDFN6 3x3IndustrialEcopack2 0 0
LDF33PT-TR ActivePPACK 5IndustrialEcopack2
LDF25PT-TR ActivePPACK 5IndustrialEcopack2
LDF18PT-TR ActivePPACK 5IndustrialEcopack2
LDF33DT-TR ActiveDPAKIndustrialEcopack2 0 0
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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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