Texas Instruments TPS54310MPWPREP

Overview

TPS54310MPWPREP from Texas Instruments is a radiation-hardened, synchronous buck PWM converter with integrated 60-mΩ high- and low-side MOSFETs, delivering up to 3 A continuous output current. It operates from 3-V to 6-V input, supports adjustable output down to 0.9 V (±1% accuracy), and features externally compensated control for design flexibility in point-of-load regulation for FPGAs, DSPs, and microprocessors.

For engineers reviewing the TPS54310MPWPREP datasheet, TPS54310MPWPREP pinout, TPS54310MPWPREP application, or TPS54310MPWPREP equivalent, key selection criteria include its extended temperature range (–55°C to 125°C), programmable switching frequency (280–700 kHz), thermal shutdown (135–165°C trip), peak current limit (4–7.5 A), and PowerPAD™ thermally enhanced 20-pin HTSSOP package.

Technical Context

The TPS54310MPWPREP implements a voltage-mode PWM architecture with an internally compensated error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and a precision 0.891-V reference trimmed for ±1% accuracy over temperature. Its oscillator supports fixed 350/550 kHz or resistor-programmable 280–700 kHz operation via the RT pin.

Control logic includes adaptive dead-time generation, leading-edge blanking (100 ns), and dual-function pins: SS/ENA for enable/slow-start (3.35-ms internal ramp), SYNC for frequency selection or external synchronization, and PWRGD for power-good signaling with 90% Vref threshold and 3% hysteresis.

Key Specifications

Pinout & Package

The TPS54310MPWPREP is housed in a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad soldered to AGND. This eliminates external heatsinks and enables >3-A operation in compact industrial and aerospace layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54310PWP, the TPS54310MPWPREP adds radiation tolerance, extended temperature range, and DMS support-critical for aerospace. Versus LM2678SD-3.3/NOPB, it delivers higher integration, better thermal performance, and design flexibility via adjustable output and frequency.

Availability

TPS54310MPWPREP is available at Aetrix Electronics and suitable for aerospace avionics, defense electronics, industrial motor control, and ruggedized networking equipment requiring stable component supply across extended temperature and radiation-exposed environments.

Supply support for TPS54310MPWPREP 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 power management ICs, with decades of heritage in high-reliability and space-grade components.

The TPS54310MPWPREP belongs to TI's SWIFT™ family of synchronous buck regulators, designed specifically for high-current, low-voltage point-of-load applications in harsh-environment systems requiring extended temperature operation and long-term supply assurance.

FAQ

What is the maximum output current capability of the TPS54310MPWPREP under continuous operation?

The TPS54310MPWPREP delivers up to 3 A continuous output current across its full operating junction temperature range of –55°C to 125°C. This rating assumes proper PCB thermal design-including soldering the PowerPAD™ to a ≥3-inch × 3-inch 1-oz copper ground plane with ≥10 thermal vias-as specified in the SLVS818 datasheet. At 125°C ambient with adequate airflow, derating may apply based on actual thermal resistance.

Does the TPS54310MPWPREP support adjustable output voltage, and what is its minimum setting?

Yes, the TPS54310MPWPREP supports fully adjustable output voltage down to 0.9 V using an external resistor divider on the VSENSE pin. Its internal voltage reference is trimmed to 0.891 V ±1%, enabling precise regulation. The device achieves ±1% output accuracy over line, load, and temperature-critical for powering modern FPGA and ASIC cores that require tight voltage margins.

How is the switching frequency configured on the TPS54310MPWPREP?

The TPS54310MPWPREP offers three frequency modes: fixed 350 kHz (RT and SYNC open), fixed 550 kHz (SYNC ≥2.5 V), or resistor-programmable 280–700 kHz via an RT-to-AGND resistor. For example, a 100-kΩ resistor sets ~500 kHz. This flexibility allows designers to balance inductor size, efficiency, and EMI compliance without changing the TPS54310MPWPREP footprint or layout.

What thermal management features does the TPS54310MPWPREP include to sustain 3-A operation?

The TPS54310MPWPREP integrates a PowerPAD™ thermally enhanced 20-pin HTSSOP package with an exposed copper pad soldered directly to AGND. With proper PCB implementation-six 0.013″ vias in the pad and four 0.018″ vias under the body-it achieves 26°C/W junction-to-ambient thermal resistance. Combined with thermal shutdown (135–165°C) and current limiting, this enables reliable 3-A operation in compact, convection-cooled enclosures.

Is the TPS54310MPWPREP pin-compatible with commercial variants like the TPS54310PWP?

Yes, the TPS54310MPWPREP is pin-compatible and functionally identical to the commercial TPS54310PWP in the same 20-pin HTSSOP (PWP) package. Both share identical pinout, electrical specifications, and layout requirements. However, the TPS54310MPWPREP adds radiation hardening, extended temperature qualification (–55°C to 125°C), and enhanced DMS support-making it suitable for aerospace and defense applications where the commercial variant is not qualified.