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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 500MA 8-DFN
- Series：ECOPACK®
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.19V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：65 µA
- Current - Supply (Max)：120 µA
- PSRR：65dB ~ 38dB (100Hz ~ 100kHz)
- Control Features：Current Limit, Enable
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：8-VDFN Exposed Pad
- Supplier Device Package：8-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LDLN050PU18R is a high-performance, low-dropout linear voltage regulator from the LDLN050 series by STMicroelectronics. It features a PMOS pass element and delivers a guaranteed output current of 500 mA. The device operates within an input voltage range of 2.7 V to 6.5 V and provides a fixed output voltage of 1.8 V. Key electrical characteristics include a typical quiescent current of 48 µA, ultra-low output noise of 13 µV RMS, and a power supply rejection ratio (PSRR) of 65 dB at 100 Hz. It supports fast startup times of 50 µs and ensures stability with minimum external capacitance of 2 µF.
Feature Summary
- Ultra-low output noise design suitable for noise-sensitive circuits
- Fast dynamic performance with rapid startup capabilities
- High power supply rejection ratio for stable operation
Applications
- Powering sensors in industrial applications
- Supplying microcontrollers (MCUs)
- Powering wireless integrated circuits
Procurement Notes
Verify the specific suffix 'PU18R' against official datasheets to confirm the fixed 1.8 V output voltage and reel packaging configuration. Ensure compatibility with the DFN8 package dimensions and thermal requirements for your PCB layout.
Selection Notes
Select this component when a 500 mA load current is required alongside strict noise constraints. The low dropout voltage minimizes power loss, while the low quiescent current extends battery life in portable devices. Verify that the application environment falls within the -40 °C to 125 °C operating temperature range.
Part Context
This part belongs to the LDLN050 family of LDO regulators designed for industrial and sensitive electronic loads. The series utilizes a PMOS pass element to achieve low impedance and fast transient response. It is AEC-Q100 Level 1 qualified, indicating suitability for automotive-grade environments requiring robust reliability.
Replacement Considerations
Consult official substitution lists for equivalent 500 mA LDOs with similar noise and PSRR specifications. Verify pinout compatibility and thermal dissipation characteristics before replacing.
