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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 300MA 4-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.33V @ 300mA
- Current - Output：300mA
- 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 LD39030ADTPU18R is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 1.8 V output with a maximum load current of 300 mA. It operates within an input voltage range of 1.5 V to 5.5 V and maintains a low dropout voltage of 330 mV at full load. The device features a very low quiescent current of 130 uA, ensuring minimal power consumption in standby modes. It offers high line regulation of 0.02 %/V and load regulation of 18 mV, with an accuracy of 1.5 %. Designed for reliability, it includes overcurrent and thermal protection and functions across a temperature range of -40 C to +125 C.
Feature Summary
- Provides fixed 1.8 V output with 300 mA capability
- Features very low quiescent current for efficiency
- Includes integrated overcurrent and thermal protection
Applications
- Battery-powered portable electronics
- Low noise analog circuit supply rails
- Embedded systems requiring stable low voltage
Procurement Notes
Verify the specific suffix '18R' confirms the 1.8 V fixed output variant. Confirm DFN-4 package compatibility with PCB footprint requirements. Ensure RoHS compliance documentation matches project specifications. Check datasheet for thermal pad grounding recommendations to maintain performance within the specified operating temperature range.
Selection Notes
Select this component when a fixed 1.8 V rail is required with minimal static power draw. It is suitable for applications where input voltage varies between 1.5 V and 5.5 V. Consider the 330 mV dropout voltage against minimum input requirements. The DFN-4 package is ideal for space-constrained designs needing SMD mounting.
Part Context
This part belongs to the LD39030 series of low dropout regulators from STMicroelectronics. The series is characterized by ultra-low quiescent current and compact packaging. The LD39030ADTPU18R specifically denotes the 1.8 V output version in a 4-DFN package, designed for high-efficiency power management in mobile and IoT devices.
Replacement Considerations
LD39030ADTPU28R provides 2.8 V output. LD39030DTPU25R provides 2.5 V output. LD59030DTPU18R offers lower quiescent current (28 uA) but different electrical characteristics.
