Texas Instruments TPS53626RSMT

Overview

TPS53626RSMT from Texas Instruments is a 3- to 5-phase synchronous buck controller IC designed for high-current CPU/GPU VR applications, supporting up to 120 A total output with adaptive on-time D-CAP3 control, 4.5–24 V input voltage range, and integrated MOSFET drivers. It operates from –40°C to 105°C and features PMBus 1.3 compliance for telemetry and configuration.

For engineers reviewing the TPS53626RSMT datasheet, TPS53626RSMT pinout, TPS53626RSMT application, or TPS53626RSMT equivalent, key selection criteria include multi-phase phase-interleaved operation, VR13/IMVP8 compatibility, programmable loop compensation via PMBus, thermal monitoring with remote diode sensing, and support for both discrete and integrated power stages.

Technical Context

The TPS53626RSMT implements a digital multi-phase buck controller architecture with D-CAP3 modulation, enabling fast transient response without external compensation components. It supports up to five phases with automatic phase shedding and interleaving to reduce input/output ripple and improve efficiency.

It integrates dual-loop thermal sensing (die temperature + remote diode), PMBus 1.3 interface for real-time voltage/current/temperature reporting, and configurable fault responses including OCP, UVP, OVP, and thermal shutdown with programmable thresholds.

Key Specifications

Pinout & Package

VQFN-32 (RSM) package: 4 mm × 4 mm body, 0.4 mm pitch, 1 mm max height, thermally enhanced with exposed copper pad soldered to PCB ground plane for thermal dissipation and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-phase buck controller applications.

Compared with ISL91302BIRZ-T7A and MP2960GQ-Z, the TPS53626RSMT delivers superior transient performance via D-CAP3, full VR13/IMVP8 compliance, and integrated thermal telemetry-making it the preferred choice for high-end CPU/GPU and AI accelerator VR designs where digital control and telemetry are critical.

Availability

TPS53626RSMT is available at Aetrix Electronics and suitable for AI accelerator power delivery, server CPU voltage regulation, and high-performance networking ASIC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS53626RSMT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in high-reliability power conversion solutions.

The TPS536xx family is designed specifically for high-current, digitally controlled multiphase VR applications in datacenter CPUs, GPUs, FPGAs, and AI accelerators-emphasizing PMBus telemetry, thermal intelligence, and adaptive control.

FAQ

What is the maximum number of phases supported by the TPS53626RSMT?

The TPS53626RSMT supports up to five phases, configurable as 3-, 4-, or 5-phase operation via pin-strapping. Each phase drives an external high-side/low-side MOSFET pair, enabling scalable current delivery up to 120 A with interleaved switching to reduce input/output ripple and improve thermal distribution across the PCB. The TPS53626RSMT automatically manages phase shedding and adding based on load demand.

Does the TPS53626RSMT require external compensation components?

No, the TPS53626RSMT uses D-CAP3 adaptive on-time control, which eliminates the need for external compensation components such as resistors and capacitors in the feedback loop. This architecture maintains stability across varying output capacitor types and ESR values while delivering fast transient response-typically under 100 ns for large load steps. The TPS53626RSMT achieves this through internal digital loop calibration and adaptive timing adjustment.

What thermal sensing capabilities does the TPS53626RSMT provide?

The TPS53626RSMT integrates dual thermal sensing: an internal die temperature sensor and a remote diode interface for direct CPU/GPU die temperature monitoring. Both sensors feed into independent over-temperature comparators with programmable thresholds via PMBus. The TPS53626RSMT can trigger thermal throttling or shutdown based on either sensor, enabling precise thermal management in high-power AI and server applications.

Is the TPS53626RSMT compatible with VR13 and IMVP8 standards?

Yes, the TPS53626RSMT is fully compliant with both VR13 and IMVP8 specifications. It supports standard VID codes, adaptive voltage positioning (AVP), and dynamic voltage identification protocols required by modern Intel and AMD processors. The TPS53626RSMT implements all mandatory timing, sequencing, and telemetry requirements-including PMBus register mapping-for seamless integration into certified server and desktop platforms.

What package type and mounting requirements apply to the TPS53626RSMT?

The TPS53626RSMT uses a VQFN-32 (RSM) package: 4 mm × 4 mm, 0.4 mm pitch, with an exposed thermal pad. The pad must be soldered to a PCB copper pour connected to ground for thermal and mechanical integrity. TI recommends using vias under the pad (filled or tented) and following the land pattern and stencil design guidelines in SLUA271 to ensure reliable reflow and thermal performance. The TPS53626RSMT is rated MSL-2-260°C.