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Texas Instruments TPS53685 Dual D-CAP+™ Multiphase Controller

Texas Instruments TPS53685 Dual D-CAP+™ Multiphase Controller incorporates a trans-inductor voltage regulator (TLVR) topology support, dual channels, built-in non-volatile memory (NVM), and PMBus™ interface. The device is fully compatible with TI NexFET™ smart power stages. The fully AMD SVI3-compliant step-down controller offers advanced control features such as D-CAP+ architecture with undershoot reduction (USR), providing fast transient response and good current sharing, minimizing output capacitance requirements. Additionally, the device supplies a novel phase interleaving strategy and dynamic phase shedding for efficiency improvements at different loads.

The TI TPS53685 provides the PMBus communication interface for reporting the telemetry of voltage, current, power, temperature, and fault conditions to the systems. To minimize the external component count, all programmable parameters can be configured by the PMBus interface and stored in NVM as the new default values.

The TPS53685 is housed in a thermally enhanced 40-pin QFN package and operates from –40°C to 125°C.

Features

4.5V to 17V Input voltage range
0.25V to 5.5V Output voltage range
Dual output supporting N+M ≤ 8 phases, M ≤ 4 phases
Native trans-inductor voltage regulator (TLVR) topology support
AMD® SVI3 compliant
Enhanced D-CAP+ control to provide superior transient performance with excellent dynamic current sharing
Programmable loop compensations
Flexible phase-firing sequencing
Dynamic phase shedding with a programmable current threshold for optimizing efficiency at light and heavy loads

Individual phase current calibrations and reports
Fast phase-adding for undershoot reduction
Driverless configuration for efficient high-frequency switching
Fully compatible with TI NexFET power stages for high-density solutions
Accurate, adjustable voltage positioning
Patented AutoBalance™ phase current balancing
Selectable per-phase current limit
PMBus system interface for telemetry of voltage, current, power, temperature, and fault conditions
5.00 x 5.00mm, 40-pin, 0.4mm pitch, QFN package

Applications

Rack server
Microserver and tower server

High-performance computing
Baseband unit (BBU)

Texas Instruments TPS53685 Dual D-CAP+™ Multiphase Controller

Features

Applications

Simplified Example Application

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