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Product Detailed Parameters
- Description：IC REG LINEAR 3V 100MA 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)：16V
- Voltage - Output (Min/Fixed)：3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.375V @ 100mA
- Current - Output：100mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：2.6 mA
- PSRR：63dB (1kHz)
- 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 LD2981CM30TR is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.0V output with a maximum load current of 100mA. The device features an ultra-low quiescent current of 80µA in normal operation and less than 1µA in shutdown mode, making it suitable for battery-powered applications. It includes logic-controlled electronic shutdown via the inhibit pin and offers internal protection against overcurrent and thermal overload.
Feature Summary
- Ultra-low dropout voltage capability ensures efficient power regulation with minimal energy loss under varying load conditions.
- Logic-controlled electronic shutdown function allows precise power management and standby mode activation via the inhibit pin.
- Internal current and thermal limit protections safeguard the device and connected circuits from damage during fault conditions.
Applications
- Battery-powered portable electronics requiring low quiescent current
- Cellular phones and personal digital assistants (PDAs)
- Palmtop and laptop computers
Procurement Notes
Verify the specific suffix 'CM30' to confirm the 3.0V fixed output voltage and SOT-23-5 package configuration. Ensure compatibility with low ESR ceramic capacitors as required by the datasheet specifications. Confirm RoHS compliance status for environmental regulations. Check lead times and production cycles directly with authorized distributors or the manufacturer for accurate delivery estimates.
Selection Notes
Select this component when a fixed 3.0V supply is needed with high efficiency and low noise. The SOT-23-5 package is ideal for space-constrained designs. Consider the 100mA output limit for load requirements. The TTL-compatible inhibit pin enables easy integration with microcontroller GPIOs for power control functions.
Part Context
This part belongs to the LD2981 family of ultra-low drop voltage regulators. The series is characterized by low quiescent current and fast dynamic response. Other variants in the family offer different fixed output voltages such as 2.5V, 3.3V, and 5.0V, sharing similar performance characteristics and protection features.
Replacement Considerations
Compatible substitutes within the same family include LD2981ABM30TR and LD2981CU30TR. Verify that alternative parts maintain the same 3.0V output, 100mA current rating, and SOT-23-5 package footprint to ensure direct interchangeability without circuit redesign.
