Texas Instruments TPS54910PWPRG4

Overview

TPS54910PWPRG4 from Texas Instruments is a 3-V to 4-V input, 9-A synchronous buck PWM converter with integrated high- and low-side MOSFETs (15 mΩ typical r_DS(on)), adjustable 0.9-V to 2.5-V output, externally compensated error amplifier (1% V_ref = 0.891 V), and selectable switching frequency (350/550 kHz fixed or 280–700 kHz adjustable). It serves as a point-of-load regulator for FPGA core supplies in telecom infrastructure.

For engineers reviewing the TPS54910PWPRG4 datasheet, TPS54910PWPRG4 pinout, TPS54910PWPRG4 application, or TPS54910PWPRG4 equivalent, key selection considerations include thermal performance in the 28-pin HTSSOP PowerPAD™ package, fast transient response under 9-A load steps, UVLO hysteresis (0.16 V), internal slow-start time (3.35 ms), and compatibility with Type-3 compensation networks for stability across wide L/C variations.

Technical Context

The TPS54910PWPRG4 implements a voltage-mode PWM control architecture with an internally trimmed 0.891-V reference, high-gain (110 dB) error amplifier, and adaptive dead-time logic to minimize shoot-through. Its oscillator supports three configuration modes: SYNC pin grounded (350 kHz), pulled high (550 kHz), or RT resistor-biased (280–700 kHz).

Protection features include peak-current limiting (11–15 A), thermal shutdown (150°C trip, 10°C hysteresis), and under-voltage lockout (2.95 V start, 2.8 V stop). The device separates analog ground (AGND) and power ground (PGND) to isolate noise-sensitive feedback paths from high-di/dt PH node currents.

Key Specifications

Pinout & Package

The TPS54910PWPRG4 is housed in a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package measuring 6.4 mm × 9.7 mm, with an exposed thermal pad soldered to AGND for efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54910PWPRG4, the TPS54821RHLR offers higher input flexibility but reduced current headroom and inferior thermal performance in high-density layouts, while the MP2315DJ-LF-Z provides simpler implementation at the expense of design adaptability and peak load capability.

Availability

TPS54910PWPRG4 is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA power delivery, and broadband access equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS54910PWPRG4 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 over 50 years of innovation in high-reliability power conversion solutions.

The TPS54910PWPRG4 belongs to TI's SWIFT™ family of integrated synchronous buck regulators, designed specifically for high-current, low-voltage point-of-load applications in networking, computing, and communications systems where board space and thermal efficiency are critical.

FAQ

What is the maximum continuous output current of the TPS54910PWPRG4?

The TPS54910PWPRG4 delivers 9 A continuous output current under recommended operating conditions (T_J ≤ 125°C, 3.0–4.0 V input, proper PCB thermal design). Peak current limit is 11–15 A, but sustained operation above 9 A requires aggressive heatsinking or derating per the dissipation ratings table in the datasheet. The TPS54910PWPRG4 achieves this with integrated 15-mΩ MOSFETs and the PowerPAD™ package.

How does the TPS54910PWPRG4 handle input voltage brownouts?

The TPS54910PWPRG4 incorporates an under-voltage lockout (UVLO) circuit with a 2.95-V start threshold and 2.8-V stop threshold, providing 0.16-V hysteresis. A 2.5-µs deglitch circuit prevents false triggering from VIN noise. When input drops below 2.8 V, the device shuts down cleanly - disabling PH switching, clearing PWRGD, and halting regulation - ensuring safe restart only after VIN exceeds 2.95 V. This behavior is fully specified in the TPS54910PWPRG4 absolute maximum and recommended operating conditions.

Can the TPS54910PWPRG4 be synchronized to an external clock?

Yes, the TPS54910PWPRG4 supports external synchronization via the SYNC pin over a 330–700-kHz range. To synchronize, drive a clean CMOS-level clock into SYNC while connecting an RT resistor that sets the free-running frequency to ≈80% of the target sync frequency. For example, for a 600-kHz sync signal, configure RT for 480 kHz. The TPS54910PWPRG4 will then lock to the external clock, reducing EMI by eliminating beat frequencies between multiple converters.

What is the purpose of the PowerPAD™ in the TPS54910PWPRG4 package?

The PowerPAD™ is an exposed thermal pad on the underside of the TPS54910PWPRG4's 28-pin HTSSOP package, electrically connected to AGND and thermally coupled to the die. When soldered to a large copper area on the PCB (with ≥12 thermal vias), it reduces junction-to-ambient thermal resistance to 14.4°C/W, enabling full 9-A operation at 85°C ambient without heatsinks. This feature is integral to the TPS54910PWPRG4's compact, high-power-density design.

Does the TPS54910PWPRG4 require external compensation components?

Yes, the TPS54910PWPRG4 uses an externally compensated error amplifier - meaning Type-2 or Type-3 compensation networks must be connected between COMP (Pin 3) and VSENSE (Pin 2). These components (resistors and capacitors) set loop bandwidth, phase margin, and transient response. The TPS54910PWPRG4 datasheet provides design equations and example values; omitting or misconfiguring them risks instability or poor load regulation.