Texas Instruments TPS54610PWPR

Overview

TPS54610 from Texas Instruments is a 3-V to 6-V input, 6-A synchronous buck PWM converter with integrated 30-mΩ high- and low-side MOSFETs, adjustable output down to 0.9 V (±1.0% accuracy), and selectable switching frequency (350/550 kHz fixed or 280–700 kHz adjustable). It delivers point-of-load regulation for FPGAs and microprocessors in space-constrained telecom and computing systems.

For engineers reviewing the TPS54610 datasheet, TPS54610 pinout, TPS54610 application, or TPS54610 equivalent, key selection considerations include its HTSSOP-28 PowerPAD™ thermal performance, internal/external slow-start control, power-good signaling for supply sequencing, and cycle-by-cycle current limiting with 200 ns response time.

Technical Context

The TPS54610 implements a voltage-mode PWM control architecture with a high-performance error amplifier (110 dB open-loop gain, 5 MHz unity-gain bandwidth) enabling flexible LC filter design. Its adaptive dead-time logic prevents shoot-through by coordinating high- and low-side gate drive timing based on MOSFET gate voltage thresholds.

It integrates undervoltage lockout (UVLO start at 2.95 V, 160 mV hysteresis), thermal shutdown (trip at 150°C, 10°C hysteresis), and overcurrent protection via high-side current sensing with 100 ns leading-edge blanking - all operating without external components beyond compensation network and bootstrap capacitor.

Key Specifications

Pinout & Package

TPS54610 is housed in a thermally enhanced 28-pin HTSSOP (PWP) package measuring 9.70 mm × 6.40 mm, featuring an exposed thermal pad for direct PCB copper connection to AGND - eliminating need for external heatsinks in most 6-A applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54612PWPR and TPS54616PWPR, the TPS54610 offers full output adjustability down to 0.9 V - critical for next-generation low-voltage processors - while maintaining identical thermal, protection, and layout compatibility across the family.

Availability

TPS54610 is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and portable computing applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS54610 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.

The TPS546xx family was designed specifically for high-density point-of-load applications in networking, computing, and communications equipment - prioritizing thermal performance, integration, and robust protection in compact packages.

FAQ

What is the minimum recommended input voltage for reliable operation of the TPS54610?

The TPS54610 incorporates an undervoltage lockout (UVLO) circuit that prevents startup until the input voltage reaches 2.95 V (typical). Operation is guaranteed from 3 V to 6 V per datasheet specifications. Below 3 V, the device remains disabled even if VIN momentarily exceeds the threshold due to UVLO hysteresis (160 mV) and 2.5 μs deglitching - ensuring stable behavior during brownout conditions. The TPS54610 will not function reliably below this threshold.

Can the TPS54610 be synchronized to an external clock, and what are the constraints?

Yes, the TPS54610 supports external synchronization via the SYNC pin across 330 kHz to 700 kHz. To synchronize, drive SYNC with a clean CMOS-level clock and connect an RT resistor set to produce a free-running frequency ≈80% of the external clock. For example, for a 500 kHz sync signal, use RT ≈ 100 kΩ. The SYNC pin must meet logic thresholds (high ≥2.5 V, low ≤0.8 V), and pulse width must exceed 50 ns. The TPS54610 does not support spread-spectrum or phase-shifted synchronization.

How does the TPS54610 handle output current sinking, and is it safe for pre-biased start-up?

The TPS54610 supports continuous current sinking during output discharge or negative transients, enabled by its synchronous architecture and high-side/lower-side MOSFET control. However, it lacks dedicated pre-bias start-up capability: if the output is pre-charged above target before enable, the device may source excessive current until regulation is established. The TPS54610 relies on external circuitry (e.g., input OR-ing diode) for true pre-bias tolerance - unlike later TI parts such as TPS54673.

What thermal performance can be expected from the TPS54610 in a standard 4-layer PCB layout?

In a JEDEC-standard 4-layer test board (3″×3″, 1.5 oz top/bottom copper, 12 thermal vias to inner planes), the TPS54610 achieves RθJA = 31.0°C/W with soldered thermal pad. At 6 A output and 5 V input, junction temperature rise is ~45°C above ambient - well within the 125°C max rating. Without thermal vias or pad soldering, RθJA degrades to 40.5°C/W, limiting continuous current to ~4.5 A at 70°C ambient. The TPS54610's PowerPAD™ design makes thermal performance highly layout-dependent.

Is the TPS54610 RoHS-compliant and qualified for industrial temperature range?

Yes, the TPS54610PWPR is RoHS-compliant (lead-free, halogen-free) and specified for operation across –40°C to +125°C junction temperature. Its absolute maximum ratings and recommended operating conditions explicitly cover this full industrial range, and thermal metrics (e.g., RθJB = 15.1°C/W) are validated under JEDEC JESD51-2 conditions. The device meets TI's standard industrial qualification testing including HTOL, uHAST, and temperature cycling - making it suitable for harsh-environment deployments where the TPS54610 is deployed.