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Product Detailed Parameters
- Description：IC REG LINEAR 2.8V 200MA 4-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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)：0.35V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：40 µA
- Current - Supply (Max)：-
- PSRR：80dB ~ 55dB (1kHz ~ 100kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：4-XDFN Exposed Pad
- Supplier Device Package：4-DFN (1x1)
- Grade：-
- Qualification：-
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Overview
The LD39020ADTPU28R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 2.8 V with a maximum output current of 200 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 200 mV at full load. Quiescent current is specified at 20 µA, with shutdown consumption below 0.1 µA when enabled. It utilizes a 4-DFN (1x1 mm) surface-mount package and supports operation from -40 °C to +125 °C junction temperature.
Feature Summary
- Logic-controlled electronic shutdown function enables ultra-low power consumption in standby modes
- Internal soft-start circuit limits inrush current during power-up sequences
- Integrated thermal protection and constant current limiting safeguard against overload conditions
Applications
- Low-power battery-operated portable devices
- Space-constrained embedded systems requiring minimal footprint
- Noise-sensitive analog circuits requiring stable regulation
Procurement Notes
Verify the specific suffix 'A' indicates the high-accuracy version with ±0.5% output voltage tolerance compared to standard variants. Confirm the 'DTPU' designation corresponds to the 4-DFN 1x1 mm package type. Ensure compatibility with ceramic output capacitors as required for stability. Check RoHS compliance status through official manufacturer channels before finalizing procurement specifications.
Selection Notes
Select this component when precise voltage accuracy is critical due to its A-version tolerance specification. The DFN4 1x1 package is optimal for designs with strict space limitations. Consider the 200 mA current limit when sizing for peak loads. Verify that the input voltage remains above the minimum threshold while accounting for dropout requirements under maximum load conditions.
Part Context
This part belongs to the LD39020 family of ultra-low quiescent current regulators. The series is designed for applications demanding high efficiency and small form factors. The 'A' variant distinguishes itself through tighter output voltage tolerances compared to standard versions in the same product line.
Replacement Considerations
LD39020DTPU28R serves as a functional substitute with identical electrical characteristics but potentially different output voltage tolerance specifications.
