Texas Instruments LP2982AIM5X-3.0/NOPB

Overview

LP2982AIM5X-3.0/NOPB from Texas Instruments is a fixed 3.0-V, 50-mA ultra-low-dropout linear regulator in SOT-23-5 package, featuring 1% output voltage accuracy (A-grade), 120 mV typical dropout at 50 mA load, and <1 μA shutdown quiescent current. It serves as a precision, micropower power supply for low-voltage battery-powered systems such as portable audio and handheld computing.

For engineers reviewing the LP2982AIM5X-3.0/NOPB datasheet, LP2982AIM5X-3.0/NOPB pinout, LP2982AIM5X-3.0/NOPB application, or LP2982AIM5X-3.0/NOPB equivalent, key selection criteria include guaranteed 50-mA output under 2.1–16 V input, ON/OFF control interface, bypass-capacitor-enabled 30 μV RMS noise, and thermal/overcurrent protection - all in a 2.9 mm × 1.6 mm surface-mount package.

Technical Context

The LP2982AIM5X-3.0/NOPB uses a vertically integrated PNP (VIP) process to achieve ultra-low dropout and minimal ground current. Its internal architecture includes a high-accuracy 1.23-V reference, ON/OFF logic-controlled sleep mode, and a dedicated BYPASS pin for external capacitor filtering of the reference node.

It operates across −40°C to +125°C junction temperature, supports input voltages from 2.1 V to 16 V, and delivers regulated 3.0 V ±1% output with line regulation of 0.007%/V and load regulation maintained over 1–50 mA. Protection features include foldback current limiting and thermal shutdown with automatic recovery.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant, lead-free (NOPB).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700T-3002E/TT and TLC7703IPK, the LP2982AIM5X-3.0/NOPB uniquely combines 1% accuracy, ON/OFF control, and BYPASS-enabled ultra-low noise in a 50-mA micropower LDO - making it optimal for space-constrained, battery-sensitive analog and mixed-signal systems where precision and quiet operation are non-negotiable.

Availability

LP2982AIM5X-3.0/NOPB is available at Aetrix Electronics and suitable for portable audio devices, wireless sensor nodes, handheld computing, and industrial control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for LP2982AIM5X-3.0/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in power management ICs and precision analog components.

The LP2982 product line was designed specifically for micropower, ultra-low-dropout regulation in battery-powered portable electronics - emphasizing low noise, high accuracy, and minimal quiescent current across extended temperature ranges.

FAQ

What is the minimum input voltage required for LP2982AIM5X-3.0/NOPB to regulate 3.0 V output?

The LP2982AIM5X-3.0/NOPB requires a minimum input voltage of VOUT + VDO = 3.0 V + 120 mV = 3.12 V (typical at 50 mA). At lighter loads, dropout drops significantly - e.g., 7 mV at 1 mA - allowing regulation down to ~3.007 V. The absolute minimum input per datasheet is 2.1 V, but regulation is only guaranteed above VOUT + VDO across temperature and load.

Does LP2982AIM5X-3.0/NOPB require an external BYPASS capacitor to function?

No, the LP2982AIM5X-3.0/NOPB operates without the BYPASS capacitor, but its output noise increases to ~120 μV RMS. Adding a 0.01 μF NPO/COG ceramic capacitor to the BYPASS pin reduces noise to 30 μV RMS - a critical requirement for sensitive analog circuits. Leakage current in this capacitor directly impacts output accuracy, so low-leakage dielectrics are mandatory.

Can LP2982AIM5X-3.0/NOPB be used with ceramic output capacitors?

Yes, but only with a 1 Ω series resistor. The LP2982AIM5X-3.0/NOPB is unstable with low-ESR ceramic capacitors alone due to its internal compensation. A 4.7 μF tantalum is recommended for unconditional stability; if using ceramic (e.g., 4.7 μF X7R), a 1 Ω resistor must be placed in series with the capacitor to raise effective ESR into the stable range per Figure 40 in the datasheet.

What happens if the output voltage exceeds the input voltage on LP2982AIM5X-3.0/NOPB?

If VOUT rises above VIN by more than ~0.7 V, the internal PNP pass transistor's inherent collector-base diode becomes forward-biased, causing reverse current flow. This can trigger latch-up and permanent damage. To prevent this, an external Schottky diode (cathode to VIN, anode to VOUT) must be added in applications where output may float high - such as during hot-swap or backup-supply scenarios.

Is LP2982AIM5X-3.0/NOPB pin-compatible with other LP2982 variants like LP2982AIM5-3.3?

Yes - all LP2982 SOT-23-5 variants (including LP2982AIM5X-3.0/NOPB, LP2982AIM5-3.3, LP2982AIM5-5.0) share identical pinout, package dimensions, and electrical interface. Only the fixed output voltage differs. PCB layout and support circuitry (IN, OUT, BYPASS, ON/OFF, GND) are fully interchangeable across the family.