Texas Instruments LP2987AIM-3.8/NOPB

Overview

LP2987AIM-3.8/NOPB from Texas Instruments is a micropower, 200 mA ultra-low-dropout linear voltage regulator with programmable power-on reset delay and 3.8 V fixed output. It features 180 mV dropout at 200 mA, 0.5% output voltage accuracy (A-grade), and operates across −40°C to +125°C junction temperature. Used in portable battery-powered systems requiring stable low-noise supply and reliable reset signaling.

For engineers reviewing the LP2987AIM-3.8/NOPB datasheet, LP2987AIM-3.8/NOPB pinout, LP2987AIM-3.8/NOPB application, or LP2987AIM-3.8/NOPB equivalent, key selection criteria include dropout performance at full load, reset delay configurability via external capacitor, shutdown quiescent current (<2 μA), and SOIC-8 package thermal characteristics for embedded power management.

Technical Context

The LP2987AIM-3.8/NOPB uses a vertically integrated PNP (VIP) pass transistor architecture enabling ultra-low dropout and low ground pin current-1 mA at 200 mA load. Its error flag circuit monitors output voltage with ±5% threshold hysteresis and doubles as a power-on reset signal when paired with an external capacitor on the DELAY pin.

Unlike the LP2988 variant, this part lacks the BYPASS pin and associated noise-reduction capability; it is optimized for cost-sensitive, low-noise-tolerant applications rather than RF or precision analog circuits. The SOIC-8 package has θ_J−A = 160°C/W, supporting continuous 200 mA operation within thermal limits under typical PCB layout conditions.

Key Specifications

Pinout & Package

LP2987AIM-3.8/NOPB is housed in an 8-pin SOIC surface-mount package (Package Drawing D0008A), with exposed pad not present. Thermal resistance θ_J−A = 160°C/W enables 200 mA continuous operation with standard 2-layer PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7703IPW and TPS76338QDBVRQ1, LP2987AIM-3.8/NOPB uniquely combines 200 mA current capability, 180 mV dropout, programmable reset delay, and shutdown control in a standard SOIC-8 package-making it optimal for portable industrial and consumer devices demanding both precision and configurability.

Availability

LP2987AIM-3.8/NOPB is available at Aetrix Electronics and suitable for cellular phone power management, palmtop computer core supply, camcorder image sensor bias, and personal stereo audio codec supply requiring stable component supply across production lifecycles.

Supply support for LP2987AIM-3.8/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 leader designing analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The LP2987 family delivers micropower, ultra-low-dropout regulation with integrated power-on reset for portable and battery-operated systems where efficiency, accuracy, and reliability are critical.

FAQ

What is the dropout voltage specification for LP2987AIM-3.8/NOPB at full 200 mA load?

The LP2987AIM-3.8/NOPB has a typical dropout voltage of 180 mV at 200 mA load and 25°C, defined as the input-to-output differential at which output drops 100 mV below nominal. This value remains stable across −40°C to +125°C junction temperature, enabling reliable operation near battery end-of-discharge.

Does LP2987AIM-3.8/NOPB include a bypass pin for noise reduction like the LP2988?

No, LP2987AIM-3.8/NOPB does not include a functional BYPASS pin. That feature is exclusive to the LP2988 variant, which uses an external capacitor on the BYPASS pin to reduce output noise. LP2987AIM-3.8/NOPB is optimized for general-purpose low-dropout regulation without added noise filtering circuitry.

How is the power-on reset delay configured on LP2987AIM-3.8/NOPB?

The reset delay on LP2987AIM-3.8/NOPB is set using an external capacitor connected to the DELAY pin. A 2.2 µA internal current source charges this capacitor; when voltage reaches 1.23 V, the ERROR pin releases high. Delay time follows T_DELAY = C_DLY × 5.59×10⁵, with max recommended C_DLY = 1 µF.

What package type and thermal characteristics apply to LP2987AIM-3.8/NOPB?

LP2987AIM-3.8/NOPB uses the SOIC-8 (D) package with Package Drawing Number D0008A. Its junction-to-ambient thermal resistance θ_J−A is 160°C/W, allowing continuous 200 mA operation with standard 2-layer PCB copper area and adequate airflow. No exposed thermal pad is present.

Is LP2987AIM-3.8/NOPB pin-compatible with other members of the LP2987/LP2988 family?

Yes, LP2987AIM-3.8/NOPB shares identical SOIC-8 pinout with all LP2987 and LP2988 variants in that package-including LP2987IM-3.8/NOPB and LP2988AIM-3.8/NOPB-but functional differences exist: LP2987AIM-3.8/NOPB lacks BYPASS functionality, while LP2988 variants require different decoupling for noise suppression.