Texas Instruments LP591250MDRVREP

Overview

LP591250MDRVREP from Texas Instruments is an enhanced-product, 500-mA low-dropout regulator (LDO) designed for RF and analog circuits. It delivers ultra-low 12 μVRMS output noise, 75 dB PSRR at 1 kHz, 30 μA quiescent current (no load), 95 mV dropout at 500 mA (VOUT ≥ 3.3 V), and operates from 1.6 V to 6.5 V input across 0.8–5.5 V output range. It powers sensitive receivers in defense-grade inertial navigation and GPS systems.

For engineers reviewing the LP591250MDRVREP datasheet, LP591250MDRVREP pinout, LP591250MDRVREP application, or LP591250MDRVREP equivalent, key selection criteria include its extended temperature range (–55°C to +125°C), power-good output with 140-μs delay, reverse current protection, and stability with only 1-μF ceramic input/output capacitors-critical for space-constrained, high-reliability embedded designs.

Technical Context

The LP591250MDRVREP integrates a precision bandgap reference, error amplifier, and current-limited pass transistor to maintain tight output regulation under fast load transients (±45 mV deviation at 10 μs edge). Its internal 3-MΩ EN pulldown resistor enables reliable disable behavior, while the 100-Ω output discharge path ensures rapid turnoff without external circuitry.

It achieves class-leading noise performance without a bypass capacitor by optimizing internal biasing and feedback loop dynamics, and supports remote placement of the output capacitor-a key advantage for layout-sensitive RF supply domains where decoupling must be localized near the load.

Key Specifications

Pinout & Package

The LP591250MDRVREP is housed in a thermally enhanced 6-pin WSON (DRV) package measuring 2.00 mm × 2.00 mm with exposed thermal pad. The pad must be connected to PCB ground plane via thermal vias for optimal thermal performance (R_θJB = 40.0°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL7407LPGDR and TPS7A2025PDQNR, the LP591250MDRVREP uniquely combines military-grade temperature range, power-good signaling, and ultra-low noise in a single-channel, space-optimized WSON package-making it irreplaceable for mission-critical analog power delivery where reliability and spectral purity are non-negotiable.

Availability

LP591250MDRVREP is available at Aetrix Electronics and suitable for defense electronics, aerospace avionics, and medical instrumentation requiring stable component supply, full traceability, and extended lifecycle support.

Supply support for LP591250MDRVREP 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 high-reliability components for industrial, automotive, and aerospace markets.

The LP5912-EP product line delivers enhanced-product LDOs engineered for defense, aerospace, and medical applications-featuring controlled baselines, extended temperature operation, and full product traceability throughout the supply chain.

FAQ

What is the maximum output current capability of the LP591250MDRVREP?

The LP591250MDRVREP delivers up to 500 mA of continuous output current. This rating is validated across the full operating junction temperature range of –55°C to +125°C and assumes proper PCB thermal design using the exposed thermal pad. At 500 mA and VOUT ≥ 3.3 V, dropout remains as low as 95 mV, enabling efficient operation even with marginal input headroom. The device includes thermal shutdown and current limiting to protect against overload conditions.

Does the LP591250MDRVREP require an external noise bypass capacitor?

No, the LP591250MDRVREP does not require an external noise bypass capacitor. Its internal architecture achieves 12 μVRMS output noise (10 Hz–100 kHz) without one-verified across all output voltages and load conditions. This simplifies layout, reduces BOM cost, and eliminates potential resonance issues associated with discrete bypass networks. The device remains stable with only 1-μF ceramic input and output capacitors.

How does the power-good (PG) output function on the LP591250MDRVREP?

The PG pin on the LP591250MDRVREP is an open-drain output that asserts high when VOUT reaches 86–93% of its nominal value, with a typical delay of 140 μs after turn-on. It requires an external pullup resistor to a compatible logic voltage. PG provides precise system-level power sequencing feedback-critical for synchronizing FPGA configuration, microcontroller boot, or RF synthesizer lock detection in safety-critical platforms.

What is the purpose of the NC pin on the LP591250MDRVREP DRV package?

Pin 2 (NC) on the LP591250MDRVREP has no internal connection. It must either be left floating or connected to GND-never driven or tied to any active signal. This pin serves a mechanical and layout role, improving package symmetry and solder joint reliability. Connecting it to GND helps reduce parasitic impedance and improves thermal conduction through the PCB, but it contributes no electrical functionality.

Is the LP591250MDRVREP qualified for extended temperature operation?

Yes, the LP591250MDRVREP is fully qualified for operation from –55°C to +125°C junction temperature. As part of TI's Enhanced Product (EP) program, it undergoes rigorous testing across this range, features controlled manufacturing baselines, and provides full traceability-meeting requirements for defense, aerospace, and medical applications where environmental resilience and long-term supply assurance are mandatory.