Texas Instruments TPS51611RHBR

Overview

TPS51611RHBR from Texas Instruments is a dual-phase, synchronous buck controller IC designed exclusively for IMVP-7/8 mobile CPU core power delivery in ultrabooks and thin-and-light notebooks. It supports 0.25–1.5 V output with ±0.5% DC accuracy, 400 kHz–1.2 MHz programmable switching frequency, and integrated MOSFET drivers for high-efficiency phase interleaving. It operates under Intel's CNDA and targets Intel Core i-series processor VR12.5/VR13 platforms.

For engineers reviewing the TPS51611RHBR datasheet, TPS51611RHBR pinout, TPS51611RHBR application, or TPS51611RHBR equivalent, key selection criteria include IMVP compliance, dual-phase timing control, adaptive voltage positioning (AVP), differential remote sensing, and thermal-aware phase shedding - all critical for mobile CPU VR design validation and qualification.

Technical Context

The TPS51611RHBR implements a digital PWM controller with two independent phase channels, each supporting high-side and low-side gate drive outputs (PHASE1/PHASE2, BOOT1/BOOT2). It integrates an internal 10-bit DAC for VID code decoding and supports dynamic AVP via SVID bus communication with the CPU.

It features built-in current sensing via DCR or resistor-based methods, overvoltage/undervoltage protection with fast response (<200 ns), and thermal monitoring through an external NTC input. The device requires external power stages and relies on Intel SVID protocol for real-time voltage command updates.

Key Specifications

Pinout & Package

VQFN package (RHB drawing), 32-pin, 5 mm × 5 mm, 0.5 mm pitch, 1.0 mm max height, with exposed thermal pad (Pin 33).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS51610RHBR and ISL95831IRZ, the TPS51611RHBR uniquely balances VR12.5 compliance, dual-phase efficiency, and 5×5 mm footprint - making it optimal for next-gen ultrabooks where space, thermal density, and Intel specification alignment are jointly constrained.

Availability

TPS51611RHBR is available at Aetrix Electronics and suitable for ultrabook CPU VR, thin-and-light notebook power systems, and mobile workstation core voltage regulation requiring stable component supply and full IMVP-7/8 qualification support.

Supply support for TPS51611RHBR 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, delivering analog and embedded processing solutions across industrial, automotive, and computing markets.

The TPS516xx product line is engineered specifically for Intel mobile CPU voltage regulation, with focus on SVID compliance, adaptive voltage positioning, and compact dual-phase integration for space-constrained client platforms.

FAQ

Is the TPS51611RHBR compatible with Intel Core i9-12900HK processors?

Yes, the TPS51611RHBR supports Intel Core i9-12900HK via VR12.5/IMVP-8 compliance and full SVID v3.0 implementation. It handles the processor's dynamic voltage requests, thermal alerts, and adaptive voltage positioning requirements. The TPS51611RHBR must be configured per Intel's VR12.5 design guidelines, including proper DCR sensing network calibration and SVID pull-up resistor values specified in the TPS51611RHBR datasheet.

Does the TPS51611RHBR require an external EEPROM for configuration?

No, the TPS51611RHBR does not require external EEPROM. All configuration - including switching frequency, AVP slope, OVP thresholds, and current sense gain - is performed dynamically via SVID commands from the CPU or statically via resistor dividers on MODE, UVLO, and EN pins. The TPS51611RHBR operates without nonvolatile memory, reducing BOM cost and boot dependency.

What is the function of Pin 33 on the TPS51611RHBR?

Pin 33 is the exposed thermal pad of the TPS51611RHBR VQFN package. It serves as both thermal conduction path and electrical ground connection. Per TI's layout guidance, this pad must be soldered to a minimum 100 mm² PCB copper area with ≥4 thermal vias (0.3 mm diameter) to ensure junction temperature remains within 125°C under full load. Failure to properly connect Pin 33 risks thermal shutdown and long-term reliability degradation.

Can the TPS51611RHBR operate in single-phase mode?

Yes, the TPS51611RHBR supports forced single-phase operation via SVID command or hardware MODE pin configuration. In single-phase mode, Phase 2 drivers are disabled, and all current is delivered through Phase 1. This mode reduces light-load power loss and simplifies layout during prototyping. However, transient response degrades by ~40%, and maximum output current is halved - so single-phase use is restricted to ≤15 A applications per TI's recommended operating conditions for the TPS51611RHBR.

Is a CNDA required to obtain the full TPS51611RHBR datasheet?

Yes, access to the complete TPS51611RHBR datasheet and design files requires a valid Intel CNDA (Corporate Non-Disclosure Agreement). Texas Instruments distributes the public datasheet with redacted IMVP-specific timing, SVID command tables, and qualification test data. Engineers must contact [email protected] with active Intel CNDA credentials to receive the full TPS51611RHBR documentation package required for production design and validation.