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Product Detailed Parameters
- Description：IC REG LINEAR 2.8V 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)：2.8V
- 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 LD59030DTPU28R is a fixed-output low dropout linear regulator from STMicroelectronics, providing a stable 2.8 V output with a maximum current capability of 300 mA. It 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. The device exhibits a quiescent current of 28 µA in active mode and less than 0.03 µA in shutdown mode. It includes internal protections such as thermal shutdown and current fold-back, along with a soft-start circuit. The component is housed in a compact DFN-4 (1x1 mm) package suitable for space-constrained surface-mount applications.
Feature Summary
- Ultra-low dropout voltage performance ensures efficient power regulation under minimal headroom conditions.
- Logic-controlled electronic shutdown function enables deep sleep modes for extended battery life.
- Internal soft-start limits inrush current during power-up sequences.
- Compatible with small ceramic output capacitors for reduced board footprint.
Applications
- Low power battery-operated portable devices
- Space-constrained embedded systems requiring high accuracy
- RF modules and sensor nodes needing low noise supply rails
Procurement Notes
Verify the specific suffix '28R' confirms the 2.8 V fixed output variant when sourcing. Ensure compatibility with DFN-4 1x1 mm land patterns. Confirm RoHS compliance status through official manufacturer documentation prior to integration into final assemblies.
Selection Notes
Select this component for designs requiring precise 2.8 V regulation with minimal static power consumption. The DFN-4 package offers significant size reduction compared to traditional SOT packages. Consider the 135 mV dropout characteristic against your minimum input voltage requirements to ensure stable operation across the entire load range.
Part Context
This part belongs to the LD59030 series of very low dropout linear regulators designed for high efficiency and low noise. The series supports various fixed output voltages ranging from 0.8 V to 5.0 V in 50 mV steps, all sharing the same compact DFN-4 footprint and protection features.
Replacement Considerations
LD59030DTPU18R provides a similar form factor with a 1.8 V output. LD59030DTPU30R offers a 3.0 V output option within the same series. Verify pinout and thermal characteristics remain identical before substituting.
