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Product Detailed Parameters
- Description：IC REG LINEAR 5V 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)：5V
- 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 LDK320AM50R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a nominal output voltage of 5 V with a maximum output current capability of 200 mA. The device operates from an input voltage range spanning 2.5 V to 18 V and features a typical dropout voltage of 100 mV at a 100 mA load. Quiescent current is specified as typically 60 μA, reducing to less than 1 μA in shutdown mode. The component includes logic-controlled enable functionality and offers high power supply rejection ratio performance.
Feature Summary
- Logic-controlled electronic shutdown enables ultra-low standby consumption
- High power supply rejection ratio ensures stable operation under noisy conditions
- Integrated thermal overload and short-circuit current limiting protections
- Compatible with small ceramic output capacitors for compact designs
Applications
- Digital signal controllers
- Television systems
- Blu-ray and DVD players
- Personal computers
- Industrial equipment
Procurement Notes
Verify the specific suffix 'A' indicates the ±0.5% output voltage tolerance variant rather than the standard ±2% version. Confirm the SOT-23-5L package designation matches your board layout requirements. Ensure the ordering code corresponds to the fixed 5 V output configuration. Cross-reference the datasheet revision date to confirm the electrical characteristics align with your design specifications.
Selection Notes
Select this component when precise voltage regulation is required within a low-power system. The high accuracy variant suits applications demanding tight output voltage stability over temperature variations. Consider the enable pin requirement if system power sequencing or remote shutdown capabilities are necessary. Evaluate the thermal resistance characteristics against your expected ambient operating temperatures.
Part Context
This device belongs to the LDK320 family of low-dropout regulators designed for battery-powered applications. The family shares common architectural features including PMOS pass elements and bandgap references. Variants within the series differ primarily in output voltage options, tolerance grades, and available packaging styles such as SOT-89.
Replacement Considerations
LDK320AU50R (SOT-89 package)
FAQ
What distinguishes the LDK320A from the standard LDK320?
The LDK320A variant offers a tighter output voltage tolerance of ±0.5% at 25 °C, whereas the standard version provides ±2% tolerance.
Is the adjustable version available in the SOT-23-5L package?
No, the adjustable version with the ADJ pin is not available in the SOT-23-5L package; it is only offered in the SOT-89 package.
