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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 500MA SOT23-5
- Series：-
- Mfr：Diotec Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.125V @ 100mA
- Current - Output：500mA
- Current - Quiescent (Iq)：3.6 µA
- Current - Supply (Max)：-
- PSRR：80dB ~ 45dB (100Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°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 LDI8119-3.3EN is a fixed positive linear voltage regulator manufactured by Diotec Semiconductor, housed in an SOT-23-5 surface-mount package. It provides a nominal output voltage of 3.3V with a maximum continuous output current of 500mA. The device supports input voltages up to 18V and operates within a junction temperature range of -40°C to +125°C. Key electrical characteristics include a typical quiescent current of 3.6µA and a maximum dropout voltage of 0.125V at 100mA load. Power supply rejection ratio (PSRR) ranges from 80dB at 100Hz to 45dB at 10kHz.
Feature Summary
- Integrated enable control pin for power management
- Built-in overcurrent and thermal overload protection
- Low quiescent current consumption for efficiency
- Fixed 3.3V output configuration
Applications
- Battery-powered portable electronic devices
- Embedded systems requiring stable 3.3V logic levels
- Industrial control modules operating in wide temperature ranges
- Communication equipment power supplies
Procurement Notes
Verify the specific ordering suffix and tape-and-reel quantity against the manufacturer's latest datasheet before finalizing purchase orders. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the supplier provides valid traceability documentation for quality assurance purposes.
Selection Notes
Select this component when a compact SOT-23-5 footprint is required for 500mA applications. The low dropout characteristic makes it suitable for batteries approaching their discharge cutoff voltage. Verify that the input voltage does not exceed the 18V absolute maximum rating under all transient conditions.
Part Context
This part belongs to the LDI8119 series of low-dropout regulators designed for general-purpose power management. The series offers various fixed output voltages while maintaining consistent performance metrics across the family. It serves as a cost-effective solution for space-constrained designs requiring reliable linear regulation.
Replacement Considerations
Consult official substitution lists for equivalent parts with matching pinouts and electrical specifications. Verify that any alternative regulator maintains the same SOT-23-5 package dimensions and thermal characteristics to ensure mechanical compatibility.
