Texas Instruments TPS54917RUVR

Overview

TPS54917 from Texas Instruments is a 3-V to 4-V input, 9-A synchronous buck DC-DC converter with integrated 13-mΩ high-side and low-side MOSFETs, adjustable output down to 0.9 V (±1% accuracy), and externally compensated voltage-mode control-designed for point-of-load regulation in FPGA and ASIC power delivery.

For engineers reviewing the TPS54917 datasheet, TPS54917 pinout, TPS54917 application, or TPS54917 equivalent, key selection considerations include its 34-pin VQFN (RUV) thermal package, 280 kHz–1.6 MHz programmable switching frequency, cycle-by-cycle current limiting, thermal shutdown at 150°C, and PWRGD open-drain power-good signaling for supply sequencing.

Technical Context

The TPS54917 implements voltage-mode PWM control with a high-performance error amplifier supporting external Type-3 compensation, enabling stable operation with ceramic or electrolytic output capacitors. Its adaptive dead-time logic prevents shoot-through by coordinating high-side and low-side gate drive timing based on real-time PH node voltage thresholds.

Switching frequency is selectable via SYNC pin state (350 kHz or 550 kHz fixed) or RT resistor (280 kHz–1.6 MHz), and synchronization to external clocks up to 1.6 MHz is supported. Undervoltage lockout (2.95 V start / 2.8 V stop) and internal 3.35-ms slow-start ensure controlled power-up under varying input conditions.

Key Specifications

Pinout & Package

TPS54917 is housed in a thermally enhanced 34-pin VQFN (RUV) package measuring 3.5 mm × 7.0 mm with an exposed PowerPAD™ 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 converter applications.

Compared with TPS54917, TPS54910RHLT offers proven reliability but sacrifices frequency flexibility and thermal performance in compact layouts, while MP2964GQKT-Z provides telemetry and broader input range at the cost of pin-incompatibility and loss of external loop control.

Availability

TPS54917 is available at Aetrix Electronics and suitable for FPGA core supplies, ASIC I/O regulation, optical transceiver modules, and industrial DSP power rails requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS54917 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 expertise in high-efficiency DC-DC conversion and automotive-grade reliability.

The TPS54917 belongs to TI's SWIFT™ family of high-current synchronous buck regulators, engineered specifically for space-constrained, high-density point-of-load applications in networking, computing, and communications infrastructure.

FAQ

What is the maximum recommended output current for the TPS54917?

The TPS54917 is rated for continuous 9-A output current under recommended operating conditions (TJ ≤ 125°C, VI = 3–4 V). Its integrated 13-mΩ MOSFETs and 34-pin VQFN PowerPAD™ package enable this rating with proper PCB thermal design-specifically, ≥4 cm² of 2-oz copper connected to the thermal pad. Peak current limit is 11–15 A, but sustained operation above 9 A requires derating based on ambient temperature and airflow.

Does the TPS54917 support external frequency synchronization?

Yes, the TPS54917 supports external synchronization via the SYNC pin across a 330 kHz to 1.6 MHz range. To synchronize, apply a clean square-wave clock to SYNC and connect an RT resistor to AGND-selected to set the free-running frequency to ~80% of the external clock frequency. This feature reduces system-level EMI by aligning switching edges with other converters or clocks in the same enclosure.

How is the output voltage set on the TPS54917?

The TPS54917 uses resistive feedback from the output to the VSENSE pin (Pin 2) to set output voltage. The internal 0.891-V reference is compared against the divided output, so VO = 0.891 × (1 + R1/R2), where R1 connects VO to VSENSE and R2 connects VSENSE to AGND. Accuracy is ±1% over line, load, and temperature-verified by TI's production test across the full operating range of the TPS54917.

What protection features does the TPS54917 include?

The TPS54917 integrates cycle-by-cycle overcurrent protection (11–15 A trip), thermal shutdown (150°C trip, 140°C release), undervoltage lockout (2.95 V start), and open-drain PWRGD signaling. It also includes leading-edge blanking (100 ns) to prevent false current-limit triggering and adaptive dead-time control to eliminate shoot-through. These protections operate autonomously without external components, ensuring robust operation in demanding environments.

Can the TPS54917 be used with ceramic output capacitors only?

Yes, the TPS54917 supports ceramic-only output capacitors thanks to its externally compensated voltage-mode architecture and high-performance error amplifier. Type-3 compensation networks (typically R-C-R-C configurations) allow stable loop response with low-ESR ceramics, eliminating the need for bulk electrolytic capacitors. This reduces solution size, improves reliability, and enhances transient response-key advantages confirmed in TI's TPS54917 evaluation module test reports.