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Product Detailed Parameters
- Description：IC REG LINEAR 4.5V 100MA TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：4.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.5V @ 100mA
- Current - Output：100mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：3 mA
- PSRR：77dB ~ 60dB (120Hz ~ 10kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The LE45ABZ is a fixed-output linear voltage regulator manufactured by STMicroelectronics. It provides a stable 4.5V output with a maximum continuous current of 100mA. The device supports an input voltage range up to 18V and features a low dropout voltage of 0.5V at full load. It is housed in a compact TO-92-3 through-hole package, suitable for space-constrained designs requiring reliable power regulation.
Feature Summary
- Fixed 4.5V output voltage ensures consistent power delivery
- Low dropout characteristic maintains regulation under varying loads
- Integrated overcurrent and thermal protection safeguards operation
Applications
- Portable electronic devices requiring stable low-voltage supply
- Battery-powered systems needing efficient linear regulation
- General-purpose circuit boards requiring simple voltage step-down
Procurement Notes
Verify the specific suffix (e.g., -TR) if reel packaging is required, as the base part number typically denotes bulk packaging. Confirm the lead time and availability status directly with authorized distributors or the manufacturer, as stock levels fluctuate. Ensure the procurement order explicitly states the TO-92-3 package type to avoid confusion with surface-mount variants.
Selection Notes
Select this component when a fixed 4.5V rail is needed with moderate current demands up to 100mA. It is appropriate for applications where input voltages do not exceed 18V and efficiency losses from linear regulation are acceptable. Consider alternative switching regulators if higher efficiency or lower heat dissipation is critical for the thermal design.
Part Context
This part belongs to the family of very low drop voltage regulators with inhibit functionality. It is designed for applications requiring simple, cost-effective power management solutions. The TO-92-3 package allows for easy integration into through-hole PCB layouts, making it suitable for prototyping and legacy board designs.
Replacement Considerations
Check for pin-compatible alternatives within the same LExx series. Verify that substitute parts match the 4.5V output, 100mA current rating, and 18V max input voltage. Ensure thermal and electrical characteristics align with the original design requirements before substitution.
