Texas Instruments UCD90160RGCR

Overview

UCD90160RGCR from Texas Instruments is a 16-rail PMBus/I²C-addressable power-supply sequencer and monitor with integrated 12-bit ADC, closed-loop margining for up to 10 rails, programmable watchdog timer, and ACPI-compliant pin-selected rail states. It supports real-time voltage monitoring (every 400 μs), four per-rail UV/OV thresholds, nonvolatile fault logging, and multiphase PWM clock generation (15.259 kHz–125 MHz). Used in server power management subsystems requiring precise sequencing of CPU, memory, and I/O rails.

For engineers reviewing the UCD90160RGCR datasheet, UCD90160RGCR pinout, UCD90160RGCR application, or UCD90160RGCR equivalent, this page delivers verified technical context on rail sequencing logic, margining accuracy (±0.5% internal 2.5-V reference), GPIO/PWM pin mapping, PMBus command compatibility, and TI Fusion GUI configuration workflow - all critical for high-reliability industrial and datacenter power system design.

Technical Context

The UCD90160RGCR implements a deterministic, time- and event-driven sequencing engine that evaluates dependencies across 16 monitored rails, 8 configurable GPI inputs, and 16 Boolean Logic GPO outputs. Its 12-bit ADC samples all 16 MON inputs every 400 μs using a 2.5-V ±0.5% internal reference, enabling sub-10-mV resolution at 3.3-V rails.

Margining is implemented via eight FPWM outputs (15.259 kHz–125 MHz) and four variable-frequency PWM outputs (0.93 Hz–7.8125 MHz), supporting closed-loop adjustment of DC-DC feedback nodes. Sequencing control integrates both PMBus commands and hardware pin states, including POWER_GOOD assertion, WARN_OV signals, and SYSTEM_RESET coordination with external processors.

Key Specifications

Pinout & Package

UCD90160RGCR is housed in a 64-pin VQFN package (9.0 mm × 9.0 mm) with exposed thermal pad. Pin functions are validated per TI SLVSAC8D Rev D datasheet (April 2019), including dedicated analog monitor inputs (MON1–MON16), dual 3.3-V supplies (V33A/V33D), and multi-function pins supporting JTAG, PMBus, and PWM.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply sequencer and monitor applications.

Compared with UCD90160RGCR, UCD90124RGCT offers reduced channel count and no margining-making it suitable for cost-constrained, lower-complexity designs-while LM25066A serves only single-rail protection and cannot replace the UCD90160RGCR's 16-rail sequencing, closed-loop margining, or ACPI state management capabilities.

Availability

UCD90160RGCR is available at Aetrix Electronics and suitable for server motherboard design, telecom line card development, and industrial PLC power subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for UCD90160RGCR 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 leadership in high-reliability industrial and datacenter solutions.

The UCD90160RGCR belongs to TI's Fusion Digital Power sequencer family, designed specifically for complex, multi-rail power system management in servers, networking equipment, and automated test systems where sequencing accuracy, fault resilience, and PMBus interoperability are critical.

FAQ

What is the maximum number of voltage rails the UCD90160RGCR can monitor and sequence?

The UCD90160RGCR monitors and sequences up to 16 voltage rails. Each rail supports independent undervoltage and overvoltage warning and fault thresholds, power-good detection, and configurable turn-on/turn-off delays. This capability is confirmed in the device's functional block diagram and pin configuration table in the SLVSAC8D datasheet, where MON1–MON16 inputs and corresponding rail-enable GPIO assignments are explicitly defined for 16 distinct power domains.

Does the UCD90160RGCR support closed-loop margining, and if so, how many rails?

Yes, the UCD90160RGCR supports closed-loop margining for up to 10 rails. It uses eight FPWM outputs (15.259 kHz–125 MHz) and four variable-frequency PWM outputs (0.93 Hz–7.8125 MHz) to adjust DC-DC converter feedback nodes. The SLVSAC8D datasheet specifies "Closed-loop margining for 10 rails" in the Features section and confirms margining-PWM frequency ranges in Section 6.5 Electrical Characteristics.

What is the accuracy and stability of the internal voltage reference used by the UCD90160RGCR's ADC?

The UCD90160RGCR uses an internal 2.5-V reference with ±0.5% accuracy over 0°C to 125°C and ±1% over –40°C to 125°C, as specified in Section 6.5 of the SLVSAC8D datasheet. This reference enables the 12-bit ADC to achieve sub-10-mV absolute measurement accuracy on 3.3-V rails and supports reliable margining and fault threshold detection across industrial temperature ranges.

Can the UCD90160RGCR be configured without a PC or GUI tool?

Yes, the UCD90160RGCR supports full configuration via PMBus commands over I²C/SMBus, allowing register-level programming without TI's Fusion Digital Power Designer GUI. All sequencing parameters, thresholds, and logic configurations are accessible through standardized PMBus commands (e.g., VOUT_COMMAND, ON_OFF_CONFIG, READ_VIN), as documented in the UCD90xxx PMBus Command Reference (SLVU352).

What package type and thermal characteristics does the UCD90160RGCR use?

The UCD90160RGCR is packaged in a 64-pin VQFN (RGC) with 9.0 mm × 9.0 mm body size and exposed thermal pad. Its thermal resistance is RθJA = 26.4°C/W and RθJB = 1.7°C/W, enabling operation up to 110°C ambient with proper PCB copper pour and thermal vias. These values are measured per JEDEC JESD51 standards and published in Section 6.4 of the SLVSAC8D datasheet.