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Product Detailed Parameters
- Description：IC REG LINEAR 3V 50MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.6V @ 50mA
- Current - Output：50mA
- Current - Quiescent (Iq)：170 µA
- Current - Supply (Max)：13 mA
- PSRR：63dB (120Hz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-25°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 LD2979M30TR is a fixed-output low-dropout voltage regulator manufactured by STMicroelectronics, providing a nominal output of 3.0 V with a maximum load current of 50 mA. It operates within an input voltage range up to 16 V and features a typical dropout voltage of 200 mV at full load. The device incorporates logic-controlled electronic shutdown functionality via an inhibit pin, which must be driven above 2 V for activation. Electrical characteristics include a quiescent current of 80 µA at no load and a supply voltage rejection ratio of 63 dB. Stability is maintained using only a 1 µF output capacitor.
Feature Summary
- Logic-controlled electronic shutdown function for power management
- Very low dropout voltage performance under load conditions
- Internal protection against thermal overload and current limiting
Applications
- Battery-powered systems requiring low noise regulation
- Low power applications utilizing the shutdown feature
- Local regulators in embedded circuitry
Procurement Notes
Verify component authenticity through authorized channels as the part status is End-of-Life. Confirm package integrity upon receipt, specifically checking for SOT-23-5L physical conformity. Ensure the inhibit pin is properly biased during testing to validate functional operation according to datasheet specifications.
Selection Notes
Select this component when a fixed 3.0 V rail is required with minimal external capacitance. The inclusion of an inhibit pin allows for system-level standby control. Verify that the application does not exceed the 50 mA output limit or the 16 V maximum input rating.
Part Context
This device belongs to the LD2979 series of very low drop regulators. It is available in multiple fixed output voltages including 3.3 V, 3.8 V, and 5.0 V variants. All members of the series share the same SOT-23-5L package and internal protection mechanisms.
Replacement Considerations
LD2979M33TR
FAQ
How is the electronic shutdown function activated?
The device is turned off when the inhibit pin voltage is below 0.18 V. To enable the regulator, the pin must be connected to a positive voltage higher than 2 V.
What is the minimum output capacitance required for stability?
The LD2979M30TR requires a minimum of 1 µF output capacitance to maintain stability.
