Texas Instruments TPS65086401RSKT

Overview

TPS65086401RSKT from Texas Instruments is a configurable multirail power-management IC (PMIC) designed specifically for Xilinx Zynq UltraScale+ MPSoCs (ZU2–ZU5). It integrates three D-CAP2™ step-down controllers (5.6V–21V input), three DCS-Control synchronous buck converters (3V–5.5V input, up to 3A each), three adjustable LDOs, a VTT LDO, and three slew-controlled load switches. It supports I²C DVS control in 10mV/25mV steps and factory OTP configuration for FPGA/MPSoC power sequencing.

For engineers reviewing the TPS65086401RSKT datasheet, TPS65086401RSKT pinout, TPS65086401RSKT application, or TPS65086401RSKT equivalent, this device delivers tightly coordinated rail control for high-density embedded processors-particularly where dynamic voltage scaling, thermal-aware sequencing, and compact 8mm × 8mm VQFN packaging are critical in wall-powered or multi-cell Li-ion systems.

Technical Context

The TPS65086401RSKT implements six independent switching regulators: three high-input-voltage D-CAP2™ controllers (BUCK1/2/6) for core/memory rails and three low-input-voltage DCS-Control converters (BUCK3/4/5) optimized for system I/O and auxiliary supplies. Each regulator supports precise I²C-based DVS with dual-step resolution (10mV for sub-1.67V, 25mV for 1V–3.575V ranges), enabling fine-grained voltage adaptation during processor state transitions.

Its digital architecture includes six configurable GPI pins (CTL1–CTL6) for enable/sleep control, four programmable GPOs for power-good signaling, and an open-drain IRQB interrupt output. Factory-programmed OTP defines default rail voltages-including BUCK1=1.8V, BUCK2=0.85V, BUCK3=0.85V, BUCK4=3.3V, BUCK5=3.3V, BUCK6=1.5V/1.2V/1.1V-and LDOA1=1.8V, LDOA2=1.2V, LDOA3=1.2V-tailored for ZU2–ZU5 SoC power trees.

Key Specifications

Pinout & Package

TPS65086401RSKT uses an 8mm × 8mm, 64-pin VQFN package (RSK) with exposed thermal pad requiring connection to PCB ground plane via multiple vias for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multirail PMIC applications.

Compared with TPS65086401RSKT, TPS6508641RSKT offers greater flexibility in core voltage feedback but requires external resistor network for BUCK1, while TPS6508640RSKT provides higher default BUCK1 voltage at the cost of reduced headroom for low-voltage ZU2–ZU5 operation-making TPS65086401RSKT the most balanced choice for new ZU2–ZU5 designs.

Availability

TPS65086401RSKT is available at Aetrix Electronics and suitable for programmable logic controllers, machine vision cameras, video surveillance systems, embedded PCs, and portable ultrasound equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for TPS65086401RSKT 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-reliability power solutions for FPGA and SoC platforms.

The TPS650864 family was engineered to simplify power delivery for Xilinx Zynq UltraScale+ MPSoCs-integrating controllers, converters, LDOs, and sequencing logic into a single IC to reduce bill-of-materials and layout complexity in space-constrained embedded systems.

FAQ

What is the default output voltage configuration for TPS65086401RSKT?

The TPS65086401RSKT has factory-programmed OTP defaults: BUCK1 = 1.8V, BUCK2 = 0.85V, BUCK3 = 0.85V, BUCK4 = 3.3V, BUCK5 = 3.3V, BUCK6 = 1.5V/1.2V/1.1V (selectable), LDOA1 = 1.8V, LDOA2 = 1.2V, LDOA3 = 1.2V. These values are defined in Section 7.4 of the datasheet and can be modified via I²C after power-up.

Does TPS65086401RSKT support DDR4 VTT termination?

Yes, TPS65086401RSKT includes a dedicated VTT LDO regulated from BUCK6's FBVOUT6 pin, with remote sensing via VTTFB. It delivers precise DDR4 termination voltage (typically 0.6V) with <±1% regulation accuracy and supports dynamic tracking during VDDQ transitions-fully compliant with JEDEC DDR4 specifications.

How does the D-CAP2™ topology in TPS65086401RSKT improve transient response?

The D-CAP2™ topology in TPS65086401RSKT uses internal ripple-based control without external compensation, achieving <10µs load transient recovery time and <50mV droop under 5A step loads. This eliminates phase-margin tuning effort and ensures stable core rail regulation during rapid Zynq UltraScale+ processor state changes.

Can TPS65086401RSKT operate from a 5V input supply?

No-TPS65086401RSKT's D-CAP2™ controllers require minimum 5.6V input (VSYS range: 5.6V–21V). However, its DCS-Control converters (BUCK3/4/5) accept 3V–5.5V inputs, and the integrated LDO5P0 can be powered from an external 5V source via V5ANA, enabling hybrid architectures where 5V feeds auxiliary rails while main input is ≥5.6V.

What thermal management features does TPS65086401RSKT include?

TPS65086401RSKT integrates die temperature monitoring with two thresholds: THOT (110°C–120°C) for warning alerts and TCRIT (130°C–160°C) for automatic shutdown. It reports status via IRQB and registers, and its 8mm × 8mm VQFN package achieves R_θJB = 4.4°C/W-enabling >3W dissipation with standard 2-layer PCB copper pours.