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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

Texas Instruments TPS65980RHFT

Name: TPS65980RHFT
Brand: Texas Instruments
SKU: TPS65980RHFT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS65980RHFT

Manufacturer:: Texas Instruments

Category:: Power Management - Specialized

Package:: 24-VFQFN Exposed Pad

Datasheet:: TPS65980RHFT.pdf

Description:: IC PWR MGMT CONV 3LDO 24VQFN

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Product details

Overview

TPS65980RHFT from Texas Instruments is a Thunderbolt™/Thunderbolt™2 bus-powered DC/DC switching regulator that accepts 2.5-V to 15.75-V input from the Thunderbolt cable and delivers three regulated 3.3-V outputs: TBT_OUT (up to 3.5 A), CBL_OUT (current-limited at 1.1 A or 2.2 A), and DEV_OUT (up to 2.5 A). It operates in charge-pump mode for low-voltage input (2.5–3.4 V) and buck-converter mode for high-voltage input (10–15.75 V), enabling power delivery to Thunderbolt controllers, active cables, and peripheral logic.

For engineers reviewing the TPS65980RHFT datasheet, TPS65980RHFT pinout, TPS65980RHFT application, or TPS65980RHFT equivalent, key selection criteria include input voltage range compatibility with Thunderbolt bus states, dual-mode regulation architecture, per-output current capability, thermal shutdown threshold (135°C), and CBL_ILIMIT-configurable cable power limit - all critical for bus-powered peripheral design validation.

Technical Context

The TPS65980RHFT implements adaptive topology selection: a switched-capacitor charge pump for 2.5–3.4 V input (supporting initial link negotiation), and a synchronous buck converter for 10–15.75 V input (enabling full-power operation). Its control logic ties HV_OK assertion to TBT_IN crossing 4.5 V with 100 mV hysteresis and RESET assertion to TBT_OUT reaching 3.1 V after soft-start ramp.

Power routing is functionally partitioned: TBT_OUT supplies the Thunderbolt controller directly from the primary regulator; CBL_OUT connects via an internal FET switch to TBT_OUT and features programmable current limiting (1.1 A / 2.2 A); DEV_OUT similarly routes from TBT_OUT but is enabled only when DEV_EN is low and HV_OK is high - ensuring system-level sequencing compliance with Thunderbolt power state transitions.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5 V to 15.75 V - supports full Thunderbolt™/Thunderbolt™2 bus power negotiation sequence from initial 3.3 V handshake to final 12–15.75 V operational voltage.
TBT_OUT Output	3.27 V ±2.5% at 3.5 A - primary regulated rail powering Thunderbolt controller and local circuitry; maintains regulation across both charge-pump and buck modes.
CBL_OUT Current Limit	1.1 A (CBL_ILIMIT = 0) or 2.2 A (CBL_ILIMIT = 1) - configurable cable power delivery enabling compliance with active cable power requirements under varying link conditions.
Thermal Shutdown	135°C typical with 10°C hysteresis - protects device during sustained overload or poor PCB thermal management without requiring external thermal monitoring.
Soft-Start Ramp	Controlled by SS pin capacitor - prevents inrush current exceeding 250 kA/s during TBT_IN power-up, reducing stress on upstream Thunderbolt port and input capacitors.
Efficiency	87% at 12 V input, 3 A total load - enables thermally constrained bus-powered designs by minimizing power loss in buck mode; 47% in charge-pump mode at 3.3 V reflects topology trade-off for low-voltage operation.
Timing: HV_OK Assertion	10 µs after TBT_IN crosses 4.5 V - provides fast, deterministic indication of valid high-voltage bus presence for downstream power sequencing logic.

Pinout & Package

The TPS65980RHFT is housed in a 24-pin VQFN (RHF) package measuring 5 mm × 4 mm × 0.9 mm, with exposed thermal pad connected to GND for enhanced heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
SS	Soft-start timing control	Connects external capacitor to set controlled inrush current ramp rate during TBT_IN power-up; prevents voltage droop on upstream Thunderbolt port.
GND (Pins 2,3,4,10)	Signal and power ground reference	Multiple dedicated ground pins minimize impedance paths for analog sensing, digital logic, and power return - critical for noise-sensitive Thunderbolt signaling.
HV_OK	High-voltage presence indicator	Open-drain output asserting high when TBT_IN > 4.5 V and TBT_OUT is valid; used to enable downstream CBL_OUT and DEV_OUT power gates.
RESET	Regulator output validity flag	Active-high signal indicating TBT_OUT has reached 3.1 V; synchronizes Thunderbolt controller initialization with stable power rail.
CBL_OUT	Cable power output	3.3-V current-limited supply routed to Thunderbolt cable electronics; current level selected by CBL_ILIMIT pin logic state.
CBL_ILIMIT	Current limit configuration input	Logic input (tied to TBT_OUT for high) selecting 1.1 A or 2.2 A CBL_OUT limit - enables dynamic cable power adaptation without firmware intervention.
DEV_EN	Peripheral device power enable	Active-low input enabling DEV_OUT connection to TBT_OUT; allows host-controlled power gating of non-Thunderbolt circuitry during sleep or fault conditions.
TBT_IN	Thunderbolt bus power input	Primary power source pin accepting 2.5–15.75 V from Thunderbolt cable; slew-rate monitored (0.1–30 kV/s) to ensure safe transition between low/high voltage states.
TBT_OUT	Main Thunderbolt controller supply	Primary regulated 3.3-V output delivering up to 3.5 A; powers Thunderbolt PHY, controller, and support circuitry - core rail for all Thunderbolt functionality.
DEV_OUT	Peripheral device supply	3.3-V output sourcing up to 2.5 A to non-Thunderbolt logic (e.g., USB interface, display bridge); enabled only when HV_OK is high and DEV_EN is low.
COMP	Buck converter compensation	Feedback loop compensation node for external RC network - stabilizes regulation across input/output load transients and ensures robustness against PCB parasitics.
BOOT, SW, PGND, CPP, CPN	Internal switcher node connections	Interface points for external inductor, bootstrap capacitor, and charge pump capacitors - define power stage layout and efficiency in buck and charge-pump modes respectively.

Key Features

Feature	Design Value
Dual-mode regulation	Automatically switches between charge-pump (2.5–3.4 V) and synchronous buck (10–15.75 V) topologies - eliminates need for external mode selection logic while maintaining 3.3-V output across Thunderbolt bus voltage transitions.
Programmable cable power limit	Two discrete current limits (1.1 A / 2.2 A) selected by single logic pin - enables one hardware design to support multiple Thunderbolt cable classes without component change.
Integrated power sequencing	HV_OK and RESET outputs provide deterministic timing signals (10 µs HV_OK assert, 20 µs RESET assert) - simplifies system-level power-on reset coordination without external timers or supervisors.
Thermal protection with hysteresis	135°C shutdown with 10°C recovery margin - prevents thermal runaway during sustained overload while avoiding oscillation near trip point in marginal thermal environments.
Low-noise 3.3-V outputs	CBL_OUT ripple ≤40 mV_P-P at light load; monotonic ramp-up with zero negative excursion - meets Thunderbolt signal integrity requirements for active cable and controller interfaces.

Applications

Thunderbolt™ Active Cable Power	Bus-Powered Thunderbolt™ Dock
Use Scenario: Powering active optical or electronic Thunderbolt cables requiring regulated 3.3 V at up to 2.2 A from the host-connected peripheral. IC Role / Device Role / Timing Role: TPS65980RHFT acts as cable power source via CBL_OUT pin, with current limit set by CBL_ILIMIT; HV_OK signal gates CBL_OUT enable timing to ensure cable power only after stable bus voltage. Use Value: Eliminates need for separate cable power IC; programmable current limit supports both standard and high-power active cables using same BOM.	Use Scenario: Enabling a single-cable Thunderbolt dock that powers USB peripherals, DisplayPort adapters, and Ethernet controllers from the host's Thunderbolt port. IC Role / Device Role / Timing Role: TPS65980RHFT provides TBT_OUT for Thunderbolt controller, DEV_OUT for dock logic, and CBL_OUT for upstream cable - all sequenced via HV_OK and DEV_EN to meet Thunderbolt power state machine. Use Value: Delivers up to 3.5 A total output from bus power alone, enabling feature-rich docks without external AC adapter.
Thunderbolt™2 Peripheral Controller Supply	Multi-Port Thunderbolt™ Hub
Use Scenario: Supplying clean, regulated 3.3 V to Thunderbolt 2 controller ICs (e.g., DSL6540) in external storage enclosures or video capture devices. IC Role / Device Role / Timing Role: TPS65980RHFT serves as primary controller supply (TBT_OUT), with RESET confirming rail stability before controller initialization; soft-start prevents input droop during hot-plug events. Use Value: Maintains 3.27 V ±2.5% under 3.5 A load across input range - ensures reliable Thunderbolt 2 link training and sustained data throughput.	Use Scenario: Distributing regulated 3.3 V to two independent Thunderbolt ports in a hub, where each port requires cable power and controller supply. IC Role / Device Role / Timing Role: TPS65980RHFT supplies TBT_OUT and DEV_OUT for hub logic, while CBL_OUT feeds one port; second port uses external TPS22920 load switch driven from TBT_OUT - preserving single-regulator architecture. Use Value: Reduces BOM count vs. dual-regulator solution; leverages CBL_OUT current limit and DEV_EN control to manage per-port power budgets dynamically.

Thunderbolt™ Active Cable Power

Bus-Powered Thunderbolt™ Dock

Use Scenario: Powering active optical or electronic Thunderbolt cables requiring regulated 3.3 V at up to 2.2 A from the host-connected peripheral.

IC Role / Device Role / Timing Role: TPS65980RHFT acts as cable power source via CBL_OUT pin, with current limit set by CBL_ILIMIT; HV_OK signal gates CBL_OUT enable timing to ensure cable power only after stable bus voltage.

Use Value: Eliminates need for separate cable power IC; programmable current limit supports both standard and high-power active cables using same BOM.

Use Scenario: Enabling a single-cable Thunderbolt dock that powers USB peripherals, DisplayPort adapters, and Ethernet controllers from the host's Thunderbolt port.

IC Role / Device Role / Timing Role: TPS65980RHFT provides TBT_OUT for Thunderbolt controller, DEV_OUT for dock logic, and CBL_OUT for upstream cable - all sequenced via HV_OK and DEV_EN to meet Thunderbolt power state machine.

Use Value: Delivers up to 3.5 A total output from bus power alone, enabling feature-rich docks without external AC adapter.

Thunderbolt™2 Peripheral Controller Supply

Multi-Port Thunderbolt™ Hub

Use Scenario: Supplying clean, regulated 3.3 V to Thunderbolt 2 controller ICs (e.g., DSL6540) in external storage enclosures or video capture devices.

IC Role / Device Role / Timing Role: TPS65980RHFT serves as primary controller supply (TBT_OUT), with RESET confirming rail stability before controller initialization; soft-start prevents input droop during hot-plug events.

Use Value: Maintains 3.27 V ±2.5% under 3.5 A load across input range - ensures reliable Thunderbolt 2 link training and sustained data throughput.

Use Scenario: Distributing regulated 3.3 V to two independent Thunderbolt ports in a hub, where each port requires cable power and controller supply.

IC Role / Device Role / Timing Role: TPS65980RHFT supplies TBT_OUT and DEV_OUT for hub logic, while CBL_OUT feeds one port; second port uses external TPS22920 load switch driven from TBT_OUT - preserving single-regulator architecture.

Use Value: Reduces BOM count vs. dual-regulator solution; leverages CBL_OUT current limit and DEV_EN control to manage per-port power budgets dynamically.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Thunderbolt bus power regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS65981RHFT	Supports dual Thunderbolt ports natively with two independent CBL_OUT rails; adds I²C interface for dynamic configuration.	Required for dual-port hubs needing independent cable power control per port; not pin-compatible with TPS65980RHFT.	Select TPS65981RHFT when designing dual-port Thunderbolt hubs requiring per-port cable power management and firmware configurability.
TPS65982RHFT	Includes integrated USB-C PD controller and Type-C port management logic; supports USB Power Delivery negotiation alongside Thunderbolt.	Suitable for hybrid Thunderbolt/USB-C docks requiring simultaneous PD contract handling and Thunderbolt bus power; larger footprint and higher complexity.	Choose TPS65982RHFT for next-generation docks supporting both Thunderbolt and USB-C Alternate Mode with unified power management.

Compared with TPS65981RHFT and TPS65982RHFT, the TPS65980RHFT offers minimal-footprint, single-port Thunderbolt bus power regulation without I²C or USB-C PD overhead - making it optimal for cost-sensitive, single-port peripherals where fixed-function simplicity and thermal efficiency are prioritized over configurability or multi-protocol support.

Availability

TPS65980RHFT is available at Aetrix Electronics and suitable for Thunderbolt™/Thunderbolt™2 systems, bus-powered peripheral designs, and power management systems requiring stable component supply with guaranteed long-term availability for industrial and embedded OEM programs.

Supply support for TPS65980RHFT 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 connectivity technologies with broad industrial, automotive, and communications product portfolios.

The TPS65980RHFT belongs to TI's Thunderbolt power management IC family, designed specifically to deliver regulated 3.3-V power from Thunderbolt bus voltage - enabling compact, bus-powered peripherals without external AC adapters.

FAQ

What is the input voltage range supported by the TPS65980RHFT?

The TPS65980RHFT supports an input voltage range of 2.5 V to 15.75 V, covering both Thunderbolt™ low-voltage handshake (2.5–3.4 V) and high-voltage operational states (10–15.75 V). This dual-range capability allows the TPS65980RHFT to remain powered throughout the entire Thunderbolt link negotiation and active data transfer phases without external voltage translation.

How does the TPS65980RHFT manage power sequencing between TBT_OUT, CBL_OUT, and DEV_OUT?

The TPS65980RHFT uses internal logic tied to HV_OK and DEV_EN to enforce strict sequencing: TBT_OUT powers up first upon TBT_IN ramp; HV_OK asserts after TBT_IN exceeds 4.5 V; CBL_OUT then enables automatically; DEV_OUT activates only when HV_OK is high and DEV_EN is pulled low. This ensures the TPS65980RHFT complies with Thunderbolt power state machine requirements without external supervision.

What determines the current limit on the CBL_OUT pin of the TPS65980RHFT?

The CBL_OUT current limit of the TPS65980RHFT is set by the logic state of the CBL_ILIMIT pin: tying CBL_ILIMIT to GND selects 1.1 A, while connecting it to TBT_OUT selects 2.2 A. This binary configuration allows hardware-based cable power adaptation - critical for supporting different Thunderbolt active cable classes using identical TPS65980RHFT-based designs.

Does the TPS65980RHFT include thermal protection, and what is its trip point?

Yes, the TPS65980RHFT includes thermal shutdown protection that activates at a typical junction temperature of 135°C, with a 10°C hysteresis to prevent oscillation. This feature safeguards the TPS65980RHFT during sustained overload or inadequate PCB thermal design, eliminating the need for external thermal monitoring circuitry in most bus-powered applications.

Can the TPS65980RHFT operate with only a 3.3-V Thunderbolt input, or does it require the higher 12-V bus voltage?

The TPS65980RHFT is fully functional with 3.3-V Thunderbolt input (within 2.5–3.4 V range), operating in charge-pump mode to generate TBT_OUT. However, full output current capability (up to 3.5 A) and highest efficiency (87%) are achieved only in buck mode at 10–15.75 V. The TPS65980RHFT seamlessly transitions between modes as bus voltage changes - no reconfiguration is needed.

TPS65980RHFT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Thunderbolt™

Current - Supply:: -

Voltage - Supply:: 2.5V ~ 15.75V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-VQFN (5x4)

TPS65980RHFT FAQ

1.How can I place an order for TPS65980RHFT through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS65980RHFT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS65980RHFT reliable?

The price and inventory of TPS65980RHFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65980RHFT is usually 5 days.

3.What payment methods are accepted for TPS65980RHFT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65980RHFT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS65980RHFT?

TPS65980RHFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS65980RHFT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS65980RHFT?

For technical support, including TPS65980RHFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65980RHFT requirements.

6.How does Aetrix verify that TPS65980RHFT is sourced from the original manufacturer or authorized distributors?

All TPS65980RHFT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS65980RHFT meets industry standards.

7.What is the process for return or replacement of TPS65980RHFT?

All TPS65980RHFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65980RHFT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS65980RHFT part is unused and in its original packaging.

Return procedure for TPS65980RHFT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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