Texas Instruments TPS51640ARSLT

Overview

TPS51640ARSLT from Texas Instruments is a dual-output, high-efficiency synchronous buck controller IC designed exclusively for IMVP-7/8 mobile CPU core and I/O power delivery. It supports 1.5V/0.9V dual-rail output, operates from -10°C to 105°C, features VQFN-48 (RSL) package, and implements Intel's VR12.5/VR12.6 compliant DVID and SVID interface for dynamic voltage identification and telemetry.

For engineers reviewing the TPS51640ARSLT datasheet, TPS51640ARSLT pinout, TPS51640ARSLT application, or TPS51640ARSLT equivalent, key selection criteria include IMVP compliance, dual-phase SVID control capability, integrated MOSFET driver support, thermal performance in thin-profile mobile platforms, and CNDA-restricted access requirements.

Technical Context

The TPS51640ARSLT implements a two-phase interleaved synchronous buck topology with adaptive on-time control and integrated gate drivers for high-side and low-side N-channel MOSFETs. It supports Intel SVID v1.4 communication for real-time voltage, current, temperature, and status reporting via a 4-wire serial bus.

It includes dedicated DVID pins for hardware-based voltage offset adjustment, programmable overvoltage/undervoltage protection thresholds, and phase shedding for light-load efficiency optimization - all aligned with IMVP-7/8 specification timing, sequencing, and fault response requirements.

Key Specifications

Pinout & Package

VQFN-48 (RSL) package: 6 mm × 6 mm body, 0.4 mm pitch, exposed thermal pad, RoHS-compliant NIPDAU finish, MSL-1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS51640ARSLT, TPS59640RSLT extends ambient operating range for harsher environments, while TPS59641RSLT adds VR12.6.1-specific timing and telemetry - neither offers pin-to-pin replacement without verifying host CPU SVID version and thermal envelope.

Availability

TPS51640ARSLT is available at Aetrix Electronics and suitable for ultrabook power delivery, gaming laptop VRMs, and mobile workstation CPU power applications requiring stable component supply, IMVP-7/8 compliance, and SVID-controlled dual-rail regulation.

Supply support for TPS51640ARSLT 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 specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-reliability electronics.

The TPS516xx family is engineered specifically for Intel IMVP-compliant mobile CPU power delivery, integrating SVID control, dual-phase timing, and thermal-aware regulation into a single VQFN-48 controller IC.

FAQ

Is TPS51640ARSLT compatible with Intel 11th Gen Core processors?

No, TPS51640ARSLT is specified for IMVP-7/8 (VR12.5/VR12.6) and does not support VR12.6.1 timing or PS4 exit requirements of Intel 11th Gen Core processors. For those platforms, TPS59641RSLT is required. TPS51640ARSLT remains valid for 8th and 9th Gen Core mobile CPUs and select Pentium/Celeron derivatives covered under IMVP-8.

Does TPS51640ARSLT require a CNDA with Intel to use?

Yes, TPS51640ARSLT is distributed under Intel's IMVP disclosure agreement. End users must hold an active CNDA with Intel before accessing full documentation or design support. TI provides basic packaging and reliability data publicly, but SVID register maps, timing diagrams, and application notes require CNDA validation. Contact [email protected] for eligibility verification.

What is the maximum output current supported by TPS51640ARSLT?

TPS51640ARSLT itself is a controller IC and does not define absolute current limits - output current depends on external MOSFET selection, inductor rating, and thermal design. With appropriate 3-nF gate-drive-compatible MOSFETs and 0.3 µH inductors, typical designs achieve 60 A per phase (120 A total) while maintaining <10°C junction rise under 100% load at 105°C ambient. TPS51640ARSLT's gate drivers are rated for this level of switching.

Can TPS51640ARSLT operate without SVID communication?

No, TPS51640ARSLT requires active SVID communication to configure output voltages, enable phases, and monitor telemetry. It lacks standalone analog programming pins or fixed-voltage modes. If SVID is inactive or unconnected, the device holds in reset and disables all outputs. TPS51640ARSLT relies entirely on Intel-compliant host processor or PMIC SVID master for initialization and runtime control.

What package variants exist for TPS51640ARSLT?

TPS51640ARSLT is offered exclusively in VQFN-48 (RSL) package with 6 mm × 6 mm footprint, 0.4 mm pitch, and exposed thermal pad. It ships in small tape-and-reel format (250 units/reel, 180 mm reel diameter). The 'T' suffix denotes this small-reel variant; the 'R' suffix (e.g., TPS51640ARSLR) indicates large-reel (2500 units/reel, 330 mm diameter), but both share identical electrical and thermal specifications.