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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 3A D2PAK-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：50 mA
- Current - Supply (Max)：100 mA
- PSRR：67dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Supplier Device Package：D2PAK-3
- Grade：-
- Qualification：-
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Overview
The LD29300D2M33R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a nominal output of 3.3 V with a guaranteed maximum load current of 3 A. It operates within an input voltage range up to 14 V and features a typical dropout voltage of 0.4 V at full load. The device incorporates internal thermal overload and short-circuit protection mechanisms. It utilizes a D2PAK surface-mount package and supports an operating junction temperature range from -40 °C to +125 °C.
Feature Summary
- Very low dropout voltage characteristic for efficient power management under high load conditions
- High accuracy fixed output voltage regulation with tight tolerance specifications
- Integrated electronic protection against overcurrent and excessive thermal stress
Applications
- Switching power supply post-regulation stages
- Series power supplies for monitors and televisions
- Computer system logic power distribution
- Battery-powered equipment requiring stable voltage rails
Procurement Notes
Verify the specific suffix 'R' indicates tape-and-reel packaging configuration when sourcing components. Confirm that the part number corresponds to the fixed 3.3 V variant rather than adjustable or other voltage options. Ensure compatibility with standard D2PAK footprint requirements during procurement planning.
Selection Notes
Select this component for applications requiring high current delivery with minimal voltage drop across the regulator. Consider the thermal resistance characteristics of the D2PAK package for adequate heat dissipation in enclosed environments. Evaluate input voltage headroom to ensure operation remains within the specified dropout limits under all expected load conditions.
Part Context
This device belongs to the LD29300xx series of very low drop voltage regulators designed for high-current applications. The series offers multiple fixed output voltages and adjustable variants housed in various packages including TO-220, D2PAK, and P2PAK configurations. The D2M33 designation specifically identifies the 3.3 V fixed output version in the D2PAK form factor.
Replacement Considerations
Compatible substitutes include LD29300V33 (TO-220 package) and LD29300P2M33R (P2PAK package). Verify pinout compatibility and thermal performance metrics before substituting different package types within the same regulatory family.
