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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 200MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.35V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：90 µA
- Current - Supply (Max)：100 µA
- PSRR：88dB ~ 48dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDK320M33R is a fixed-output linear voltage regulator from the LDK320 series, manufactured by STMicroelectronics. It provides a nominal output voltage of 3.3 V with a maximum continuous output current of 200 mA. The device operates within an input voltage range of 2.5 V to 18 V and features a typical dropout voltage of 100 mV at 100 mA load. Key electrical parameters include a quiescent current of 60 µA (typical) and a power supply rejection ratio (PSRR) of 88 dB at 120 Hz. It incorporates logic-controlled electronic shutdown, reducing off-mode current to less than 1 µA. Protection mechanisms include short-circuit current limiting, thermal shutdown, and safe operating area protection.
Feature Summary
- Logic-controlled electronic shutdown for ultra-low power consumption in standby mode
- High power supply rejection ratio for effective noise filtering
- Integrated thermal, short-circuit, and safe operating area protections
- Stabilized operation compatible with ceramic output capacitors
Applications
- Digital Signal Controllers
- Television systems
- Blu-ray and DVD players
- Personal computers
- Industrial equipment
Procurement Notes
Verify the specific suffix 'M33R' against official documentation to confirm the fixed 3.3 V output voltage and SOT-23-5 package configuration. Ensure compatibility with required input voltage ranges and load conditions. Confirm environmental compliance status such as RoHS3 adherence prior to integration into final designs.
Selection Notes
Select this component for applications requiring low dropout performance and high accuracy. Consider the 3.3 V fixed output and 200 mA current capability. Evaluate the need for the enable pin functionality for power management. Verify that the SOT-23-5 package fits the board layout constraints and thermal requirements.
Part Context
The LDK320M33R belongs to the LDK320 family of low-dropout regulators designed for battery-powered applications. This series offers high accuracy and high PSRR. The M33R designation specifically indicates the fixed 3.3 V output variant packaged in SOT-23-5. The family supports various output voltages and packages including SOT-89.
Replacement Considerations
Consult official STMicroelectronics documentation for confirmed substitute part numbers within the LDK320 series or equivalent product lines. Verify pinout compatibility and electrical specifications before substitution.
