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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 500MA 6-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：12V
- Voltage Dropout (Max)：0.3V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：800 µA
- Current - Supply (Max)：-
- PSRR：62dB ~ 55dB (120Hz ~ 10kHz)
- Control Features：Enable, Power Good
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：6-VDFN Exposed Pad
- Supplier Device Package：6-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LDFMPUR is a 500 mA very low drop linear regulator from STMicroelectronics, operating with an input supply voltage range of 2.5 V to 16 V. It provides fixed and adjustable output voltages from 0.8 V to 12 V. The device features high output precision, very low dropout voltage (300 mV max at 500 mA load), low noise, and low quiescent current (200 µA typ). It includes logic-controlled electronic shutdown, Power Good output, and internal current and thermal protection, suitable for low voltage microprocessors and memory applications.
Feature Summary
- Very low dropout voltage performance for efficient power management
- Logic-controlled electronic shutdown and Power Good output for system monitoring
- Internal current and thermal protection mechanisms
- Low quiescent current operation
Applications
- Low voltage microprocessor power supplies
- Memory circuit powering
- Battery-powered systems requiring low dropout regulation
Procurement Notes
Verify the specific suffix 'PUR' against official STMicroelectronics documentation to confirm package type and tape/reel specifications. Ensure the required output voltage matches available fixed or adjustable variants. Confirm temperature range and pinout compatibility with your PCB design before ordering.
Selection Notes
Select this component when a 500 mA output current is sufficient and input voltages range between 2.5 V and 16 V. Consider its low dropout characteristic for maintaining regulation near the minimum input voltage. Evaluate the need for logic control and Power Good signals for system integration.
Part Context
The LDFM series comprises fast, very low drop linear regulators designed for low voltage applications. This family offers high precision and low noise, making it suitable for sensitive analog and digital circuits. The LDFMPUR variant belongs to this active product line within STMicroelectronics' LDO regulator portfolio.
Replacement Considerations
Check for direct cross-references in ST's replacement guide. Verify if other LDFM variants with different suffixes offer identical electrical characteristics but different packaging or temperature grades.
