Texas Instruments LP2986AIMX-3.3/NOPB

Overview

LP2986AIMX-3.3/NOPB from Texas Instruments is a micropower, ultra-low-dropout linear voltage regulator delivering a precise 3.3 V output at up to 200 mA with 0.5% initial accuracy (A grade), 180 mV typical dropout at full load, and <1 µA quiescent current in shutdown - designed for battery-powered portable electronics requiring stable low-noise supply rails.

For engineers reviewing the LP2986AIMX-3.3/NOPB datasheet, LP2986AIMX-3.3/NOPB pinout, LP2986AIMX-3.3/NOPB application, or LP2986AIMX-3.3/NOPB equivalent, key selection criteria include guaranteed 200-mA output capability, integrated ERROR flag with ±5% output monitoring, thermal/overcurrent protection, −40°C to +125°C junction operation, and fixed 3.3-V output configured via internal resistive divider without external components.

Technical Context

The LP2986AIMX-3.3/NOPB uses a vertically integrated PNP (VIP) bipolar process to achieve ultra-low dropout and high precision. Its error amplifier compares the internal 1.23-V reference against feedback from either internal TAP/SENSE connections (for fixed 3.3 V) or an external resistor divider (for adjustable outputs).

It integrates an open-collector ERROR comparator that asserts low when VOUT falls >5% below nominal, plus active-high SHUTDOWN control enabling sleep mode with sub-1-µA quiescent draw. Protection includes thermal shutdown and current limiting with 400-mA peak capability.

Key Specifications

Pinout & Package

LP2986AIMX-3.3/NOPB is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with standard lead spacing and surface-mount compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LP2986AIMX-3.3/NOPB, LP2985AIMX-3.3/NOPB offers identical accuracy and package but reduced current capacity, while TLS850C2TE/V33 trades micropower efficiency for automotive robustness and higher drive strength - neither is pin-compatible, but both serve adjacent design requirements where 200-mA precision LDO capability is needed.

Availability

LP2986AIMX-3.3/NOPB is available at Aetrix Electronics and suitable for cellular phones, palmtop computers, camcorders, and digital cameras requiring stable component supply with long-term production support.

Supply support for LP2986AIMX-3.3/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 specializing in analog and embedded processing technologies, with leadership in power management ICs and precision analog solutions.

The LP2986AIMX-3.3/NOPB belongs to TI's LP298x family of micropower LDO regulators, engineered specifically for portable battery-operated equipment demanding ultra-low dropout, high accuracy, and integrated supervision features.

FAQ

What is the maximum input voltage rating for the LP2986AIMX-3.3/NOPB?

The LP2986AIMX-3.3/NOPB has an absolute maximum input voltage rating of 16 V and a recommended operating range of 2.1 V to 16 V. Exceeding 16 V may cause permanent damage. The device maintains regulation down to 2.1 V input when delivering 3.3 V output, enabled by its 180-mV typical dropout voltage at full load.

Does the LP2986AIMX-3.3/NOPB require external components to deliver its fixed 3.3-V output?

No, the LP2986AIMX-3.3/NOPB delivers its fixed 3.3-V output without external resistors. It uses an internal resistive divider; users configure fixed mode by connecting SENSE to OUT and FEEDBACK to TAP. Only mandatory external components are input (≥2.2 µF) and output (≥4.7 µF ceramic) capacitors for stability.

How does the ERROR pin on the LP2986AIMX-3.3/NOPB function, and what external circuitry is needed?

The ERROR pin on the LP2986AIMX-3.3/NOPB is an open-collector output that goes low when VOUT drops more than ~5% below nominal (i.e., below 3.135 V). An external pull-up resistor to VOUT or another supply (≤16 V) is required. The pin can sink up to 300 µA; if unused, it may be left floating.

What thermal performance can be expected from the LP2986AIMX-3.3/NOPB in SOIC-8 package?

In the SOIC-8 (D) package, the LP2986AIMX-3.3/NOPB has a junction-to-ambient thermal resistance (R_θJA) of 114.4°C/W on a high-K test board. At 200 mA and 1-V dropout, power dissipation is ~200 mW, resulting in ~23°C junction rise above ambient - well within the −40°C to +125°C operating range without forced cooling.

Is the LP2986AIMX-3.3/NOPB compatible with ceramic output capacitors, and what ESR range is acceptable?

Yes, the LP2986AIMX-3.3/NOPB is stable with ceramic output capacitors ≥4.7 µF. Unlike many older LDOs, it does not require minimum ESR; it is optimized for low-ESR ceramics. TI specifies stability across a wide ESR range (0.01 Ω to 1 Ω), making X7R, COG, and NP0 ceramics fully suitable without added series resistance.