LD2981ABM38TR

$0.50

Description：IC REG LINEAR 3.8V 100MA SOT23-5
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR)

SKU:604eac6b0c41 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 3.8V 100MA SOT23-5
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：16V
Voltage - Output (Min/Fixed)：3.8V
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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LD2981ABM38TR

Overview

The LD2981ABM38TR is a fixed-output ultra-low-drop voltage regulator from STMicroelectronics, providing a nominal 3.8V output with a guaranteed maximum current of 100mA. It operates within an input voltage range of 2.5V to 16V and features a typical dropout voltage of 180mV at full load. The device incorporates logic-controlled electronic shutdown via the INHIBIT pin, reducing quiescent current to less than 1µA in off mode. Designed for stability with low ESR ceramic capacitors, it includes internal current and thermal limits.

Feature Summary

Ultra-low dropout voltage operation suitable for battery-powered systems
Logic-controlled electronic shutdown function for standby power reduction
Stable performance when used with low ESR ceramic output capacitors
Integrated internal current limiting and thermal shutdown protection

Applications

Cellular phones
Palmtop or laptop computers
Personal digital assistants (PDA)
Camcorders and cameras

Procurement Notes

Verify that the specific part number matches the required output voltage and package configuration. Confirm the presence of the 'A' suffix indicates the ±0.75% tolerance version. Ensure compatibility with low ESR ceramic capacitors as specified in the datasheet application notes. Check for any environmental compliance markings such as ECOPACK on the packaging.

Selection Notes

Select this component for applications requiring precise voltage regulation with minimal power loss under light loads. The tight ±0.75% output voltage tolerance makes it suitable for sensitive analog circuits. Consider the SOT-23-5L package for compact designs where space is limited. Evaluate the thermal resistance characteristics if operating near maximum load currents.

Part Context

This component belongs to the LD2981 series of ultra-low drop voltage regulators. The series offers various fixed output voltages including 1.5V, 1.8V, 2.5V, 3.0V, 3.3V, 3.6V, 3.8V, and 5.0V. The 'AB' designation specifically denotes the high-precision version with tighter output voltage tolerances compared to the standard 'C' version.