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Product Detailed Parameters
- Description：IC REG LINEAR 2.9V 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)：2.9V
- 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 LDK120M29R is a low dropout voltage regulator from STMicroelectronics providing a fixed 2.9 V output with a maximum current of 200 mA. It operates within an input voltage range of 1.9 V to 5.5 V and features a typical dropout voltage of 300 mV. The device exhibits a quiescent current of 60 µA and maintains a power supply rejection ratio of 88 dB. It is housed in an SOT-753 package, supports surface mount installation, and functions reliably across a temperature range of -40°C to +125°C.
Feature Summary
- Provides stable regulated voltage with minimal voltage drop under load conditions
- Maintains high power supply rejection to suppress noise interference
- Operates efficiently with low static current consumption
Applications
- Battery-powered portable electronic devices requiring efficient power management
- Embedded systems needing clean power supplies for sensitive analog circuits
- Communication modules requiring stable voltage regulation under varying loads
Procurement Notes
Verify the specific suffix R indicates reel packaging configuration when sourcing components. Confirm the exact output voltage tolerance matches design requirements before integration. Ensure thermal management strategies align with the specified operating temperature range for reliable long-term performance in final assemblies.
Selection Notes
Choose this component when a fixed 2.9 V rail is required with moderate current demands up to 200 mA. Consider its low quiescent current for battery life optimization. Evaluate the SOT-753 footprint against available board space constraints during the initial schematic capture phase.
Part Context
This regulator belongs to the LDK120 series designed for low-noise applications. It complements other variants in the family offering different fixed output voltages while sharing similar electrical characteristics and package options for consistent design implementation across multiple product lines.
Replacement Considerations
Direct substitutes include LDK120M28R for 2.8 V output or LDK320ADU120R for 12 V output if voltage levels differ. Verify pin compatibility and thermal performance when swapping between these related regulators.
