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Product Detailed Parameters
- Description：IC REG LINEAR 1.5V 500MA DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：1.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1V @ 200mA (Typ)
- Current - Output：500mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：12 mA
- PSRR：82dB ~ 65dB (120Hz ~ 10kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
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Overview
The LF15CDT is a positive low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 1.5V with a maximum output current of 0.5A. The device features a typical dropout voltage of 0.5V at 1.5A load, though datasheets indicate 1V at 200mA for specific conditions. It supports input voltages up to 16V and offers high power supply rejection ratio (PSRR), reaching 82dB at 120Hz and 65dB at 10kHz. The component is housed in a DPAK package.
Feature Summary
- Fixed 1.5V output voltage regulation
- High power supply rejection ratio for noise filtering
- Low dropout voltage design for efficiency
- Supports up to 0.5A continuous output current
Applications
- Powering sensitive analog circuits
- Supplying RF circuit stages
- Post-regulation for switching power supplies
- Digital logic level translation power sources
Procurement Notes
Verify the exact suffix against the manufacturer's official documentation to confirm pinout compatibility and thermal characteristics. Ensure the procurement channel provides genuine components with traceable lot codes. Cross-reference the ordering part number with the latest datasheet revision to avoid discrepancies in electrical specifications or package dimensions.
Selection Notes
Select this component when a stable 1.5V rail is required from higher input voltages. Consider its PSRR performance if the upstream power source contains significant ripple. Evaluate thermal dissipation requirements based on the voltage drop between input and output currents. Verify that the DPAK package fits the available PCB space and thermal management strategy.
Part Context
This LDO belongs to STMicroelectronics' family of low-power linear regulators designed for portable and battery-operated applications. It complements other fixed-output variants in the series, offering a balance between simplicity and performance for noise-sensitive systems. The DPAK package facilitates surface-mount assembly while providing adequate heat dissipation for moderate current loads.
Replacement Considerations
Check for direct pin-compatible substitutes such as the LF15CDT-TR for tape-and-reel packaging needs. Verify equivalent electrical parameters like output voltage tolerance and quiescent current before substitution.
