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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 500MA PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：12 mA
- PSRR：80dB ~ 65dB (120Hz ~ 65dB)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Supplier Device Package：PPAK
- Grade：-
- Qualification：-
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Overview
The LF33CPT-TR is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum load current of 0.5 A. The device operates within an input voltage range of 2.5 V to 16 V and features a typical dropout voltage of 0.45 V at full load. It includes integrated protection against overcurrent and thermal overload. The component is housed in a surface-mount PPAK package with four power terminals and one tab, designed for efficient heat dissipation. It supports an operating temperature range from -40 °C to +125 °C.
Feature Summary
- Integrated enable control feature for power management
- Built-in overcurrent and thermal shutdown protection mechanisms
- Low quiescent current operation suitable for battery-powered systems
Applications
- Battery-powered portable electronic devices
- Low-noise analog circuit power supplies
- Embedded system voltage regulation
Procurement Notes
Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is STMicroelectronics to ensure authenticity. Check the datasheet for exact pinout compatibility with your PCB footprint. Ensure the operating environment stays within the specified -40 °C to 125 °C range for reliable performance.
Selection Notes
Select this component when a fixed 3.3 V output is required with up to 500 mA load capability. It is appropriate for applications needing low dropout voltage to maximize battery life. Consider the PPAK package for its thermal performance in space-constrained designs. Verify that the input voltage does not exceed the 16 V maximum rating under all conditions.
Part Context
This part belongs to the LFxx series of very low-drop regulators from STMicroelectronics. The series offers various output voltages and packages including TO-220, DPAK, and PPAK. The LF33CPT-TR specifically utilizes the PPAK package for high-current applications requiring good thermal characteristics. It is part of a broader family of LDOs designed for efficiency and reliability.
Replacement Considerations
Compatible substitutes include other 3.3V 0.5A LDOs from STMicroelectronics such as the LF33CDT-TR or LF33ABDT-TR, provided pinouts and thermal requirements match. Verify electrical specifications and package dimensions before substitution.
