Texas Instruments TPS73225MDBVREP

Overview

TPS73225MDBVREP from Texas Instruments is a radiation-hardened, capacitor-free NMOS low-dropout (LDO) regulator delivering 250mA output with 2.5V fixed output voltage, 40mV typical dropout at full load, ±1% overall accuracy across –55°C to +125°C, and reverse current protection - deployed in space-grade power management for FPGAs and VCOs.

For engineers reviewing the TPS73225MDBVREP datasheet, TPS73225MDBVREP pinout, TPS73225MDBVREP application, or TPS73225MDBVREP equivalent, this page delivers verified electrical specs, SOT-23 pin mapping, thermal shutdown behavior, noise-reduction implementation guidance, and validated alternatives for high-reliability embedded systems requiring extended temperature operation and no-output-capacitor stability.

Technical Context

The TPS73225MDBVREP uses an NMOS pass transistor in voltage-follower topology, enabling stable operation without any output capacitor while maintaining ultra-low dropout and near-constant ground pin current over load. Its BiCMOS process delivers 30μVRMS output noise (10kHz–100kHz) and <1μA shutdown current.

It integrates thermal shutdown (trip at 160°C, reset at 140°C), foldback current limiting (250–600mA range), and active reverse current blocking (<15μA reverse leakage when EN = low). The NR pin supports external noise-reduction capacitors to reduce output noise by ~3.2×.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package with exposed thermal pad connected to GND; compact 2.9mm × 1.6mm footprint suitable for high-density PCB layouts in SWaP-constrained aerospace modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS73225MDBVREP, TPS73225MDCKREP offers identical regulation performance in a smaller footprint but reduced thermal capability, while TPS7H3301-SP provides higher current and flexibility at the cost of added complexity, larger solution size, and mandatory output capacitance.

Availability

TPS73225MDBVREP is available at Aetrix Electronics and suitable for spacecraft power distribution, defense radar signal chains, avionics flight control units, and downhole telemetry systems requiring stable component supply across extended temperature and radiation environments.

Supply support for TPS73225MDBVREP 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 ICs, with decades of heritage in space-qualified components and military-grade power management solutions.

The TPS732xx-EP product line was designed specifically for high-reliability applications demanding extended temperature operation, radiation tolerance, and capacitor-free LDO stability - targeting aerospace, defense, and industrial systems where failure is not an option.

FAQ

What is the maximum continuous output current for TPS73225MDBVREP?

The TPS73225MDBVREP is rated for 250mA continuous output current under specified thermal conditions. Its internal foldback current limit activates at 250–600mA depending on output voltage and temperature, protecting the device during overload or short-circuit events. Derating is required above 70°C ambient per the DBV package's RθJA of 255°C/W on low-K board.

Does TPS73225MDBVREP require an output capacitor to remain stable?

No - the TPS73225MDBVREP is explicitly designed for capacitor-free operation and maintains stability with zero output capacitance. It also remains stable with any value or type of output capacitor (ceramic, tantalum, polymer), eliminating ESR constraints and simplifying design for harsh-environment applications where capacitor reliability is a concern.

How does the NR pin function on TPS73225MDBVREP?

On the TPS73225MDBVREP, the NR pin connects to the internal bandgap reference node. Adding a capacitor (0.01μF–10nF) from NR to GND forms a low-pass filter that reduces output noise by ~3.2× - e.g., from 30μVRMS to ~9.4μVRMS - making it ideal for powering VCOs and precision ADC references.

What is the reverse current specification for TPS73225MDBVREP?

The TPS73225MDBVREP limits reverse current to less than 15μA (max) when the enable pin is driven low and VIN ≤ VOUT. This NMOS-based reverse blocking eliminates need for external Schottky diodes in OR-ing configurations and prevents backfeed during hot-swap or power domain isolation in redundant systems.

Is TPS73225MDBVREP qualified for space applications?

Yes - TPS73225MDBVREP is an enhanced-product (EP) grade device qualified per MIL-PRF-38535 Class V, with testing including HAST, temperature cycling, and radiation tolerance characterization. It is documented for use in spaceflight systems and carries full QML-V traceability with lot-specific test reports available upon request.