Texas Instruments LP2992ILDX-5.0

Overview

LP2992ILDX-5.0 from Texas Instruments is a fixed-output, micropower, ultra-low-dropout linear regulator in 5-pin SOT-23 (DBV) package, delivering up to 250mA output current with ±0.5% output accuracy (new chip), 30µVRMS output noise (with 10nF bypass capacitor), and 70dB PSRR at 1kHz. It operates across 2.5V–16V input range and supports stable regulation with 2.2µF ceramic output capacitors - ideal for powering low-voltage MCUs and RF subsystems in space-constrained industrial and wireless applications.

For engineers reviewing the LP2992ILDX-5.0 datasheet, LP2992ILDX-5.0 pinout, LP2992ILDX-5.0 application, or LP2992ILDX-5.0 equivalent, key selection criteria include dropout voltage at 250mA (≤260mV), shutdown current (1.12µA typ), thermal performance (RθJA = 178.6°C/W), and compatibility with low-ESR ceramic capacitors without external compensation.

Technical Context

The LP2992ILDX-5.0 uses a CMOS pass transistor architecture with internal bandgap reference and soft-start circuitry to minimize inrush current. Its BYPASS pin enables low-noise operation via external 10nF capacitor, while ON/OFF pin provides active-high enable control with 0.72V logic-low threshold and 0.85V logic-high threshold (new chip).

It integrates overcurrent limiting (300–350mA peak), thermal shutdown, and internal output pulldown during disable. The regulator maintains ±1% output accuracy across –40°C to +125°C junction temperature and load range 1mA–250mA, meeting tight tolerance requirements of modern microcontrollers and RF front-ends.

Key Specifications

Pinout & Package

LP2992ILDX-5.0 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with exposed pad not present (legacy DBV variant). Thermal resistance is RθJA = 178.6°C/W on standard 2s2p JEDEC board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSS721AIDR and MCP1703T-5002E/MB, LP2992ILDX-5.0 delivers superior noise performance (30µVRMS vs uncharacterized), tighter output accuracy (±0.5% vs ±2%), and integrated thermal protection - making it the preferred choice for RF, industrial, and automotive-adjacent designs demanding robustness and signal integrity.

Availability

LP2992ILDX-5.0 is available at Aetrix Electronics and suitable for washers and dryers, land mobile radios, active antenna systems, and cordless power tools requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for LP2992ILDX-5.0 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management ICs.

The LP2992 product line is designed for micropower, low-noise, ultra-low-dropout regulation in space-constrained and thermally demanding applications - targeting industrial control, wireless infrastructure, and portable electronics.

FAQ

What is the maximum input voltage rating for LP2992ILDX-5.0?

The LP2992ILDX-5.0 has an absolute maximum continuous input voltage of 18V for the new chip revision. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input range remains 2.5V to 16V, ensuring optimal dropout, thermal, and PSRR performance across temperature and load conditions. Always verify VIN against the specific revision marked on the device top-side marking.

Does LP2992ILDX-5.0 require an external bypass capacitor?

Yes - LP2992ILDX-5.0 requires a 10nF ceramic capacitor between the BYPASS pin and GND to achieve its specified 30µVRMS output noise. Without this capacitor, output noise increases significantly (up to 10×), degrading performance in noise-sensitive applications like RF biasing or precision analog circuits. The BYPASS capacitor must be placed as close as possible to the pin with short, low-inductance traces.

Can LP2992ILDX-5.0 operate with a 2.2µF output capacitor only?

Yes - LP2992ILDX-5.0 is explicitly characterized and guaranteed stable with a single 2.2µF X7R ceramic capacitor (derated to ≥1µF effective value) on the OUT pin. This eliminates the need for larger or more expensive capacitor types. For higher ESR (>1Ω), TI recommends adding a 100nF MLCC in parallel, placed adjacent to the OUT pin.

What is the shutdown current of LP2992ILDX-5.0 when disabled?

The shutdown current of LP2992ILDX-5.0 is 1.12µA (typical) at 25°C and 1.75µA (max) across –40°C to +125°C, measured with ON/OFF pin driven low and VIN = 16V. This ultra-low disable current makes LP2992ILDX-5.0 suitable for battery-backed systems where standby power budget is critical, such as smart meters and remote sensors.

Is LP2992ILDX-5.0 pin-compatible with other LP2992 variants?

LP2992ILDX-5.0 shares the same 5-pin SOT-23 (DBV) footprint and pinout as all LP2992 fixed-output variants (e.g., LP2992IM5X-3.3), including identical IN, OUT, GND, ON/OFF, and BYPASS assignments. However, output voltage is factory-trimmed and not interchangeable - substituting a different fixed-output variant requires verifying system-level voltage tolerance and load behavior.