Analog Devices Inc. LTC3886IUKG

Overview

LTC3886IUKG from Analog Devices is a dual-output, polyphase DC/DC controller with PMBus interface, designed for high-accuracy FPGA and ASIC core power delivery. It supports SmartVID2 voltage commands (0.82 V to 0.93 V), achieves ±0.5% output voltage regulation over temperature and line/load, and integrates precise current sensing and telemetry reporting for real-time rail monitoring in multi-rail systems.

For engineers reviewing the LTC3886IUKG datasheet, LTC3886IUKG pinout, LTC3886IUKG application, or LTC3886IUKG equivalent, this controller enables deterministic power sequencing, autonomous voltage optimization via SmartVID2, and fault-aware operation in Arria 10/Virtex UltraScale FPGA platforms requiring tight voltage control and system-level PSM coordination.

Technical Context

The LTC3886IUKG implements two independent synchronous buck controllers with integrated 12-bit ADCs for voltage, current, and temperature telemetry. Each channel supports programmable loop compensation, phase interleaving up to 6-phase per output, and PMBus v1.3 command set including VOUT_COMMAND, READ_VOUT, and READ_IOUT.

It features shared timing architecture via SHARE_CLK for synchronized up/down sequencing across multiple PSM devices, and FAULT bus coordination for system-wide fault response. The device operates from 4.5 V to 26.5 V input, supports 0.5 V to 5.5 V output range, and maintains ±0.5% output accuracy over –40°C to 125°C junction temperature.

Key Specifications

Pinout & Package

The LTC3886IUKG is housed in a 52-pin 7 mm × 8 mm QFN package with exposed pad (UKG suffix), optimized for thermal performance and high-density PCB layouts in multi-rail power systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output digital power controller applications.

Compared with LTC3886IUKG, LTC3887IUH#PBF offers identical precision and telemetry but requires external coordination for dual-rail systems, while TPS53689RTAT delivers comparable voltage accuracy but lacks native sequencing synchronization and fault black-box capabilities-increasing design complexity for FPGA platforms.

Availability

LTC3886IUKG is available at Aetrix Electronics and suitable for FPGA core power, multi-rail industrial CPU supplies, and ASIC validation platforms requiring stable component supply, long-term lifecycle support, and guaranteed PSM interoperability.

Supply support for LTC3886IUKG 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and computing markets since 1965.

The LTC3886IUKG belongs to Analog Devices' Power System Management (PSM) product line, engineered specifically for FPGA, ASIC, and multi-core processor power delivery with emphasis on accuracy, telemetry, and system-level coordination.

FAQ

What is the primary function of the LTC3886IUKG in an FPGA power system?

The LTC3886IUKG serves as a dual-output, digitally controlled DC/DC controller that regulates and sequences FPGA core power rails with ±0.5% accuracy. It interprets SmartVID2 voltage requests, reports real-time telemetry via PMBus, and coordinates timing-critical up/down sequencing with other PSM devices using SHARE_CLK-making it central to reliable, thermally optimized FPGA operation in the LTC3886IUKG-based power architecture.

Does the LTC3886IUKG support Altera Arria 10 SmartVID2 voltage ranges?

Yes, the LTC3886IUKG natively supports the Altera Arria 10 SmartVID2 specification, accepting commanded voltages from 0.82 V to 0.93 V with 10 mV resolution and settling within 30 mV of target in ≤10 ms. Its PMBus VOUT_COMMAND implementation complies with Arria 10's SmartVID2 protocol requirements, and its ±0.5% regulation accuracy ensures the LTC3886IUKG stays within FPGA voltage limits under all operating conditions.

How does the LTC3886IUKG achieve ±0.5% output voltage accuracy?

The LTC3886IUKG achieves ±0.5% output voltage accuracy through a combination of high-precision internal voltage reference, differential Kelvin sensing (VOUT_SENSE±), on-chip trimming, and closed-loop digital compensation. This accuracy is maintained across –40°C to +125°C, 4.5 V–26.5 V input range, and full load-enabling minimal voltage guard bands and direct use of the LTC3886IUKG in timing-critical FPGA applications without external calibration.

Can the LTC3886IUKG operate without a host microcontroller or PMBus master?

Yes, the LTC3886IUKG supports autonomous operation: it boots to factory-programmed default voltages and sequences independently using internal EEPROM settings. While full SmartVID2 adaptation and telemetry require a PMBus master, the LTC3886IUKG delivers regulated output and basic sequencing without external control-ensuring functional power-up even if the host controller is absent or delayed.

What packaging and thermal characteristics define the LTC3886IUKG?

The LTC3886IUKG uses a 52-pin 7 mm × 8 mm QFN package (UKG) with exposed thermal pad, rated for –40°C to +125°C junction temperature. Its low thermal resistance (θ_JA ≈ 26°C/W typical) enables high-power density layouts, and the package is RoHS-compliant and lead-free. This mechanical and thermal profile makes the LTC3886IUKG suitable for compact, convection-cooled FPGA power modules where board space and thermal headroom are constrained.