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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 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)：5.5V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：60 µA
- Current - Supply (Max)：100 µA
- PSRR：55dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDK120M12R is a fixed positive Low Dropout (LDO) voltage regulator manufactured by STMicroelectronics. It delivers a precise 1.2V output with a maximum load current of 200mA. The device operates from an input supply voltage range of 1.9V to 5.5V. Key electrical characteristics include low quiescent current and very low noise performance, making it suitable for sensitive analog circuits. The typical dropout voltage is specified at 150mV under full load conditions.
Feature Summary
- Provides stable 1.2V fixed output voltage
- Supports up to 200mA continuous load current
- Features very low noise architecture
- Operates with low quiescent current consumption
Applications
- Portable battery-powered devices requiring low noise power
- RF modules and wireless communication interfaces
- Sensor signal conditioning circuits
- Embedded microcontroller power supplies
Procurement Notes
Verify the complete part number including the suffix 'M12R' to ensure correct output voltage and package configuration. Confirm that the source document explicitly identifies this specific variant as a 1.2V fixed regulator. Check for any specific ordering or marking codes that may indicate different thermal or packaging options within the same family.
Selection Notes
Select this component when a low-noise, fixed 1.2V rail is required for sensitive analog or RF sections. Ensure the input voltage remains within the 1.9V to 5.5V operational range. Consider the SOT-23-5 package constraints for thermal management if operating near the 200mA limit. Verify compatibility with system ground references and load transient requirements.
Part Context
This component belongs to the LDK120 series of low-dropout regulators from STMicroelectronics. The series offers various output voltages and packages. The LDK120M12R specifically denotes the 1.2V fixed output version in the SOT-23-5 package. It is designed for applications demanding high PSRR and low noise in space-constrained portable electronics.
Replacement Considerations
Check for other LDK120 variants with identical 1.2V output and SOT-23-5 packaging. Verify pin-to-pin compatibility before substitution. Ensure replacement parts meet the same low-noise and quiescent current specifications. Cross-reference with official STMicroelectronics documentation for approved alternatives.
