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Product Detailed Parameters
- Description：LDI54-3.0EN
- Series：LDI54-xxEN
- Mfr：Diotec Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：45V
- Voltage - Output (Min/Fixed)：3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.35V @ 100mA
- Current - Output：350mA
- Current - Quiescent (Iq)：-
- Current - Supply (Max)：-
- PSRR：85dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDI54-3.0EN is a fixed linear voltage regulator (LDO) manufactured by Diotec Semiconductor, housed in an SOT-23-5 surface-mount package. It provides a fixed positive output voltage of 3 V with a maximum output current of 350 mA. The device supports an input voltage range from 3 V to 45 V and features a typical dropout voltage of 350 mV at 100 mA load. It operates within a junction temperature range of -40 °C to +125 °C.
Feature Summary
- Fixed 3 V output voltage regulation
- High input voltage tolerance up to 45 V
- Low dropout performance for efficient power management
- Compact SOT-23-5 surface-mount packaging
Applications
- Battery-powered portable electronics
- Embedded systems requiring stable 3 V logic levels
- Industrial control modules
- Communication equipment power supplies
Procurement Notes
Verify the specific manufacturer datasheet for absolute maximum ratings and thermal characteristics before integration. Confirm that the input voltage remains within the specified 3 V to 45 V range under all operating conditions. Ensure proper PCB layout for heat dissipation given the SOT-23-5 package constraints. Check for RoHS compliance documentation if required by your assembly standards.
Selection Notes
Select this component when a stable 3 V rail is needed from higher voltage sources up to 45 V. The 350 mA current capability suits moderate load applications. Consider the low dropout characteristic for battery-operated devices where headroom is limited. The SOT-23-5 package offers space efficiency for dense circuit boards compared to larger regulator packages.
Part Context
This part belongs to Diotec Semiconductor's LDI54 series of linear regulators. The series is designed for general-purpose voltage regulation tasks requiring high input voltage tolerance. The LDI54-3.0EN specifically targets applications needing a precise 3 V output in a compact form factor, distinguishing it from higher current or adjustable variants within the same product family.
Replacement Considerations
Check for direct pin-compatible alternatives such as other 3 V LDOs in SOT-23-5 packages from different manufacturers. Verify that substitute parts meet the 45 V input voltage requirement and 350 mA output current specification. Ensure thermal performance and dropout voltage characteristics are comparable to maintain system stability.
