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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 1A DPAK
- 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：-
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- 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 LDF33DT-TR is a low-dropout voltage regulator manufactured by STMicroelectronics, designed for applications requiring stable power delivery. It provides a fixed output voltage of 3.3 V with a maximum output current capability of 1 A. The device operates within an input voltage range from 2.6 V to 16 V and features a typical dropout voltage of 500 mV. Key electrical specifications include a quiescent current of 200 uA, a line regulation of 0.01 %/V, and a load regulation of 0.2 %/A. It offers a typical power supply rejection ratio (PSRR) of 60 dB. The component is housed in a TO-252-3 surface-mount package and supports operation across a temperature range of -40 °C to +125 °C.
Feature Summary
- Provides a fixed 3.3 V output with high current capacity up to 1 A
- Operates with a wide input voltage range extending up to 16 V
- Features low quiescent current consumption for efficiency
- Includes thermal protection mechanisms for reliable operation
Applications
- Portable battery-powered equipment
- Post-regulation for switching regulators
- Battery chargers
- Car audio systems
Procurement Notes
Verify the specific revision code and manufacturing date code upon order confirmation, as components may be subject to obsolescence or lifecycle changes. Confirm that the TO-252-3 package variant matches your PCB footprint requirements exactly. Ensure compliance with RoHS directives if required for your target market. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability status before finalizing procurement plans.
Selection Notes
Select this component when a fixed 3.3 V rail is needed with up to 1 A load current. Consider the TO-252-3 package for adequate heat dissipation in space-constrained designs. Evaluate the 500 mV dropout voltage against your minimum input voltage constraints. Compare the 200 uA quiescent current against system power budget requirements. Verify that the operating temperature range meets environmental conditions.
Part Context
This device belongs to the LDF series of low-dropout regulators from STMicroelectronics. The series is characterized by its ability to maintain regulation with minimal voltage difference between input and output. The LDF33DT-TR specifically targets applications requiring robust performance in automotive and industrial environments. It complements other PMIC offerings by providing simple, cost-effective linear regulation solutions.
Replacement Considerations
Check for direct pin-compatible alternatives within the same LDF family or similar LDO architectures from the same manufacturer. Verify that any substitute maintains the 3.3 V output, 1 A current rating, and TO-252-3 package form factor. Ensure thermal and electrical characteristics match or exceed original specifications.
