Texas Instruments LP2982IM5X-3.0/NOPB

Overview

LP2982IM5X-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 power supply for low-power microcontrollers, RF modules, and sensor interfaces in battery-operated portable electronics.

For engineers reviewing the LP2982IM5X-3.0/NOPB datasheet, LP2982IM5X-3.0/NOPB pinout, LP2982IM5X-3.0/NOPB application, or LP2982IM5X-3.0/NOPB equivalent, key selection criteria include dropout performance at light-to-moderate loads, ON/OFF control timing behavior, bypass-capacitor–dependent noise reduction (30 μV RMS), thermal shutdown response, and compatibility with tantalum or ceramic+series-resistor output capacitors.

Technical Context

The LP2982IM5X-3.0/NOPB uses a vertically integrated PNP (VIP) pass transistor architecture to achieve ultra-low dropout and minimal ground current-375 μA typical at 50 mA load and 80 μA at 1 mA. Its internal 1.23-V bandgap reference enables high initial accuracy and tight line regulation (0.007%/V typical).

It integrates active ON/OFF control with logic-compatible thresholds (ON ≥1.4 V, OFF ≤0.15 V), sleep-mode operation (<1 μA IQ), overcurrent foldback limiting (150 mA peak), and thermal shutdown (125°C junction limit). The BYPASS pin connects to an external 0.01-μF capacitor to reduce output noise by stabilizing the reference node.

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 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3002E/TT and TPS70630DRVR, the LP2982IM5X-3.0/NOPB delivers superior noise performance via its BYPASS pin and tighter output accuracy at low load, making it optimal for precision analog and RF supply rails-whereas the alternatives trade noise and accuracy for higher current or integrated supervision features.

Availability

LP2982IM5X-3.0/NOPB is available at Aetrix Electronics and suitable for wearable health monitors, industrial wireless transmitters, automotive cabin cameras, portable test equipment, and battery-powered IoT edge nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LP2982IM5X-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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.

The LP2982 product line was developed specifically for micropower, ultra-low-dropout regulation in space-constrained, battery-powered systems-emphasizing minimal quiescent current, high accuracy, and noise-sensitive analog supply integrity.

FAQ

What is the minimum input voltage required for LP2982IM5X-3.0/NOPB to maintain regulated 3.0-V output at 50 mA?

The LP2982IM5X-3.0/NOPB requires a minimum input voltage of 3.12 V to sustain 3.0 V ±1% output at 50 mA load, based on its typical 120 mV dropout voltage. At lower loads, dropout decreases significantly-e.g., 7 mV at 1 mA-allowing operation down to ~3.007 V. Input below 3.12 V at full load causes output to droop outside specification.

Can LP2982IM5X-3.0/NOPB use ceramic output capacitors, and if so, what design constraints apply?

Yes, LP2982IM5X-3.0/NOPB can use ceramic output capacitors, but only with a 1-Ω series resistor to raise effective ESR into the stable range. TI explicitly warns that low-ESR ceramics (e.g., 2.2 μF NPO with ~15 mΩ ESR) cause oscillation. Tantalum (4.7 μF) is preferred for unconditional stability; if using ceramic, verify phase margin across −40°C to +125°C with the added resistor.

How does the BYPASS pin on LP2982IM5X-3.0/NOPB reduce output noise, and what capacitor type is recommended?

The BYPASS pin connects directly to the internal bandgap reference node; adding a 0.01-μF capacitor here shunts high-frequency noise away from the reference, reducing output RMS noise from ~120 μV to 30 μV (300 Hz–50 kHz). NPO or COG ceramic capacitors are recommended due to their ultra-low leakage (<1 nA)-excessive leakage shifts output voltage via reference loading.

What happens to LP2982IM5X-3.0/NOPB if the output voltage exceeds the input voltage, and how is this mitigated?

If VOUT rises above VIN by >0.7 V, the internal PNP pass transistor's inherent collector-base diode becomes forward-biased, causing reverse current flow that may trigger parasitic SCR latch-up and device failure. To prevent this, TI mandates an external Schottky diode (cathode to VIN, anode to VOUT) whenever reverse voltage conditions are possible-limiting reverse bias to ~0.3 V.

Is LP2982IM5X-3.0/NOPB compatible with lead-free reflow processes, and what is its moisture sensitivity level (MSL)?

Yes, LP2982IM5X-3.0/NOPB is RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020). Its SOT-23-5 (DBV) package carries MSL-1 rating-unlimited floor life at ≤30°C/85% RH, requiring no bake prior to assembly. The NOPB suffix confirms lead-free terminations and compatible plating (e.g., matte tin).