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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 500MA 8-DFN
- Series：-
- 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)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.5V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：65 µA
- Current - Supply (Max)：120 µA
- PSRR：65dB ~ 38dB (100Hz ~ 100kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-VDFN Exposed Pad
- Supplier Device Package：8-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LDLN050PU33R is a 500 mA low-dropout linear voltage regulator from STMicroelectronics, providing a fixed 3.3 V output. It operates within an input voltage range of 2.7 V to 6.5 V and features a typical quiescent current of 48 µA. The device delivers ultra-low output noise of 13 µV RMS and achieves high power supply rejection ratio (PSRR) of 65 dB at 100 Hz. It supports fast startup times of 50 µs and maintains stability with minimum capacitance of 2 µF. The component functions across a temperature range of -40 °C to 125 °C and includes built-in current limiting and thermal protection.
Feature Summary
- Ultra-low output noise design suitable for sensitive circuits
- Fast dynamic response with rapid startup characteristics
- Integrated reverse current protection capabilities
Applications
- Powering microcontrollers in industrial environments
- Supplying wireless integrated circuits
- Providing stable voltage to precision sensors
Procurement Notes
Verify the specific suffix PU33R against official datasheets to confirm the fixed 3.3 V output and DFN8 package configuration. Ensure compatibility with required output capacitance values for stability. Confirm availability status as product lifecycles may change without prior notice.
Selection Notes
Select this regulator for applications requiring low noise and high PSRR under space constraints. The DFN8 package offers a compact footprint while maintaining thermal performance. Consider the 500 mA output capability and low quiescent current for battery-operated systems requiring efficient power management.
Part Context
This component belongs to the LDLN050 series of high-performance LDO regulators designed for industrial and consumer electronics. The series emphasizes low noise and fast transient response, making it suitable for powering analog and digital loads in compact form factors.
Replacement Considerations
Consult official substitution guides for compatible alternatives. Verify pinout compatibility and electrical specifications before replacing existing components in established designs.
