Texas Instruments TPS54680MPWPEP

Overview

TPS54680MPWPEP from Texas Instruments is a radiation-hardened, high-efficiency synchronous buck PWM converter with integrated 30-mΩ high-side and low-side MOSFETs, delivering up to 6-A continuous output current across 3-V to 6-V input. It supports power-up/down tracking via the TRACKIN pin for precise sequencing in multi-rail systems and operates at fixed 350 kHz or adjustable 280–700 kHz switching frequency. Designed for defense, aerospace, and medical applications, it enables point-of-load regulation for FPGAs, DSPs, and ASICs requiring tight voltage sequencing.

For engineers reviewing the TPS54680MPWPEP datasheet, TPS54680MPWPEP pinout, TPS54680MPWPEP application, or TPS54680MPWPEP equivalent, key selection criteria include its –55°C to 125°C operating junction temperature range, integrated PowerPAD™ thermal management, tracking-enabled sequencing capability, and dual overcurrent/thermal protection architecture.

Technical Context

The TPS54680MPWPEP implements a voltage-mode PWM control architecture with an internal error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and adaptive dead-time logic to prevent shoot-through. Its TRACKIN multiplexer dynamically selects between external reference ramp and internal 0.891-V precision reference based on input voltage slope, enabling accurate tracking during power-up and power-down transitions.

It integrates a dedicated VBIAS LDO (2.7–2.9 V output) for internal biasing, under-voltage lockout (2.95 V start / 2.80 V stop), and a programmable oscillator using an external RT resistor. The device features peak-current limiting (6.5–12 A trip range depending on VIN), thermal shutdown (135–165°C), and open-drain PWRGD output asserting at ≥90% of VREF with 3% hysteresis.

Key Specifications

Pinout & Package

The TPS54680MPWPEP is housed in a thermally enhanced 28-pin HTSSOP (PWP) package with an exposed PowerPAD™ on the underside for direct PCB thermal conduction. The package requires soldering the PowerPAD to a large copper area connected to AGND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54680QPWPREP, the TPS54680MPWPEP provides guaranteed operation down to –55°C and full defense-grade traceability, while LTM4625IY#PBF trades tracking and ruggedness for integration and ease of layout-making TPS54680MPWPEP the sole choice for mission-critical sequencing in harsh environments.

Availability

TPS54680MPWPEP is available at Aetrix Electronics and suitable for defense electronics, aerospace flight control systems, and medical imaging subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS54680MPWPEP 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 power management solutions.

The TPS54680MPWPEP belongs to TI's SWIFT™ family of integrated synchronous buck regulators, engineered specifically for high-density, high-reliability power delivery in defense, aerospace, and medical systems demanding extended temperature operation and full product lifecycle traceability.

FAQ

What is the maximum continuous output current supported by the TPS54680MPWPEP?

The TPS54680MPWPEP delivers up to 6 A of continuous output current when operated within its recommended conditions: input voltage 3–6 V, junction temperature ≤125°C, and proper PCB thermal design with the PowerPAD soldered to a ≥3″×3″ 1-oz copper plane. At 125°C junction temperature and 5-V input, typical efficiency remains above 89%, ensuring reliable thermal performance without derating.

Does the TPS54680MPWPEP support power supply sequencing with other regulators?

Yes, the TPS54680MPWPEP supports precise power-up and power-down sequencing via its TRACKIN pin. When an external voltage ramp (e.g., from another regulator's PWRGD or soft-start output) is applied to TRACKIN, the TPS54680MPWPEP's output follows that ramp at the same rate-enabling strict ordering between core and I/O rails in FPGAs and processors without external sequencers.

What is the purpose of the PowerPAD™ in the TPS54680MPWPEP package?

The PowerPAD™ is an exposed thermal pad on the underside of the TPS54680MPWPEP's HTSSOP package. It must be soldered directly to a large copper area connected to AGND to conduct heat from the die to the PCB. With θJCbot = 1.3 °C/W, this feature enables full 6-A operation without heatsinks and is essential for meeting the –55°C to 125°C extended temperature specification.

Can the switching frequency of the TPS54680MPWPEP be adjusted, and how?

Yes, the TPS54680MPWPEP supports both fixed and adjustable switching frequencies. Leaving the RT pin (Pin 28) open configures 350 kHz operation. Connecting an external resistor from RT to AGND sets the frequency: 180 kΩ yields ~280 kHz, 100 kΩ yields ~500 kHz, and 68 kΩ yields ~700 kHz. The relationship is linear and documented in TI's SGLS212A datasheet.

What protection features does the TPS54680MPWPEP include to ensure system reliability?

The TPS54680MPWPEP integrates multiple autonomous protections: peak-current limiting (trip range 6.5–12 A depending on VIN), thermal shutdown (135–165°C with 10°C hysteresis), under-voltage lockout (2.95 V start / 2.80 V stop with 2.5-µs deglitch), and open-drain PWRGD output (asserts at ≥90% VREF). These features eliminate the need for external fault management circuitry in safety-critical designs.