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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 300MA 4-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.23V @ 300mA
- Current - Output：300mA
- Current - Quiescent (Iq)：40 µA
- Current - Supply (Max)：305 µA
- PSRR：75dB ~ 55dB (1kHz ~ 100kHz)
- Control Features：Enable, Soft Start
- Protection Features：Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：4-XDFN Exposed Pad
- Supplier Device Package：4-DFN (1x1)
- Grade：-
- Qualification：-
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Overview
The LD59030DTPU33R is a fixed-output low dropout linear regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum current capacity of 300 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 135 mV at full load. Quiescent current is specified at 40 µA, while power supply rejection ratio reaches 80 dB at 1 kHz. It includes internal soft-start, overcurrent protection, and thermal shutdown. The component is housed in a compact 4-DFN (1x1 mm) surface-mount package and supports operation from -40 °C to +125 °C.
Feature Summary
- Ultra-low dropout voltage performance for efficient battery-powered applications
- Logic-controlled enable pin for electronic shutdown with minimal standby consumption
- Integrated protection mechanisms including thermal shutdown and current fold-back
- Compatible with small ceramic output capacitors for space-constrained designs
Applications
- Low power portable consumer electronics
- Battery-operated sensor nodes
- Embedded systems requiring stable 3.3 V logic rails
- Space-constrained mobile devices
Procurement Notes
Verify the exact suffix 'DTPU33R' against official STMicroelectronics documentation to confirm the 3.3 V fixed output variant. Ensure compatibility with DFN-4 packaging requirements and check for RoHS compliance status in the latest datasheet revision before finalizing procurement specifications.
Selection Notes
Select this regulator when a fixed 3.3 V rail is required with high accuracy and low noise. Consider the 300 mA current limit and 135 mV dropout characteristics against system load profiles. Verify that the input voltage remains within the 1.5 V to 5.5 V range under all operating conditions to ensure proper regulation.
Part Context
This component belongs to the LD59030 series of ultra-low dropout linear regulators designed for low-power applications. The series offers various fixed output voltages and shares common features such as low quiescent current and compact packaging. It serves as a power management solution for devices prioritizing efficiency and board space savings.
Replacement Considerations
Consult official manufacturer substitution lists for verified equivalents. Generic LDO replacements may differ in dropout voltage, quiescent current, or stability requirements with ceramic capacitors.
