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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 1A 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)：0.5V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：800 µA
- Current - Supply (Max)：-
- PSRR：60dB ~ 45dB (120Hz ~ 100kHz)
- Control Features：Enable, Power Good
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- 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：-
Download product information
Overview
The LDF33PT-TR is a fixed-output low-dropout (LDO) voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum load current of 1 A. The device features a line regulation of 0.04 %/V and a load regulation of 0.6 %/A, ensuring precise voltage control under varying conditions. It operates within an input voltage range of 2.6 V to 16 V and maintains accuracy within ±1.5%. Designed for surface-mount applications, it utilizes a PPAK package with five pins. The component supports operation from -40 °C to +125 °C and draws a typical static current of 800 µA.
Feature Summary
- Provides a fixed 3.3 V output with high precision regulation
- Supports up to 1 A continuous load current
- Operates over a wide temperature range suitable for industrial environments
Applications
- Power management in portable electronic devices
- Voltage regulation for microcontroller supply rails
- Battery-powered system power conditioning
Procurement Notes
Verify the specific datasheet revision and package marking codes against official STMicroelectronics documentation before integration. Confirm that the PPAK footprint matches your PCB layout requirements. Ensure input voltage constraints are respected to maintain dropout performance. Cross-reference the part number with authorized distributors to confirm authenticity and traceability.
Selection Notes
Select this component when a fixed 3.3 V rail is required with moderate current capability. The PPAK package offers thermal efficiency for surface-mount designs. Consider the 800 µA quiescent current if battery life is a critical factor. Verify that the input voltage range aligns with your source supply to ensure proper regulation without excessive heat dissipation.
Part Context
This part belongs to STMicroelectronics' LDO regulator family, designed for efficient voltage conversion. The LDF series emphasizes compact packaging and reliable performance in space-constrained applications. It serves as a key component in power management integrated circuits (PMIC) for consumer and industrial electronics requiring stable low-voltage supplies.
