Analog Devices Inc. LTC3886IUKG#PBF

Overview

LTC3886IUKG#PBF from Analog Devices is a dual-output, 60V input PolyPhase® synchronous step-down DC/DC controller with PMBus/I²C digital power system management. It delivers two independent outputs (0.5–13.8V each), supports up to 6-phase current sharing, integrates 16-bit ADC and 12-bit DAC telemetry, and operates across –40°C to 125°C for telecom and industrial point-of-load applications.

For engineers reviewing the LTC3886IUKG#PBF datasheet, LTC3886IUKG#PBF pinout, LTC3886IUKG#PBF application, or LTC3886IUKG#PBF equivalent, this page provides verified specifications, real-world use cases, validated alternatives, package mapping, and design-critical timing, telemetry, and fault-handling details - all confirmed against Analog Devices' Rev G datasheet and LTpowerPlay integration requirements.

Technical Context

The LTC3886IUKG#PBF implements analog current-mode control with programmable loop compensation via integrated error amplifiers (gm range 1.00–5.76 mmho, 5-bit RITHR resolution) and supports both continuous and discontinuous conduction modes. Its dual-channel architecture enables independent soft-start, sequencing, margining, and fault response per output.

It embeds a full PMBus v1.3-compliant interface with EEPROM-backed configuration storage (10-year retention, 10k write cycles), CRC-protected telemetry (VIN, VOUT, IOUT, temperature), and hardware fault pins (FAULT0/FAULT1, PGOOD0/PGOOD1) with configurable propagation delay (e.g., OV response in 35 µs, UV in 100 µs).

Key Specifications

Pinout & Package

Package: 52-lead (7mm × 8mm) QFN with exposed thermal pad (Pin 53 = GND). RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC3886IUKG#PBF, LTC3887IUKG#PBF trades dual-rail flexibility for higher input voltage headroom and simpler layout, while TPS546D24ARVFT offers higher per-channel current but sacrifices wide-VIN capability, EXTVCC optimization, and extended temperature qualification.

Availability

LTC3886IUKG#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and data center power shelves requiring stable component supply, long-term lifecycle assurance, and guaranteed –40°C to 125°C operation.

Supply support for LTC3886IUKG#PBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The LTC3886 product line was designed specifically for digitally managed, high-reliability DC/DC power conversion in mission-critical infrastructure - emphasizing precision telemetry, robust fault handling, and seamless integration with LTpowerPlay for system-level power architecture validation.

FAQ

What is the maximum input voltage supported by the LTC3886IUKG#PBF?

The LTC3886IUKG#PBF supports an absolute maximum input voltage of 60V, with recommended operating range from 4.5V to 60V. The device includes undervoltage lockout (UVLO) at 3.7V (falling) and 3.95V (rising), and its top-gate and switch pins tolerate transient voltages up to 71V and 65V respectively - enabling robust operation in noisy 48V telecom and industrial bus environments. This rating is confirmed in the Absolute Maximum Ratings table of Rev G datasheet.

Does the LTC3886IUKG#PBF support independent sequencing of its two outputs?

Yes, the LTC3886IUKG#PBF supports fully independent time-based and event-based sequencing for VOUT0 and VOUT1. Each output has dedicated RUN0/RUN1 pins and programmable ON_DELAY, OFF_DELAY, and ramp rates via PMBus commands (e.g., ON_OFF_CONFIG, VOUT_COMMAND). Sequencing can be triggered by external signals, voltage thresholds, or telemetry events - allowing precise power-up order for multi-rail FPGAs or ASICs without external timing ICs.

How does the LTC3886IUKG#PBF handle overvoltage faults on its outputs?

The LTC3886IUKG#PBF detects output overvoltage using dedicated comparators with 9-bit resolution and ±2.5% threshold accuracy. Upon detection, it asserts FAULT0 or FAULT1 within 35µs and executes a configurable response - including immediate shutdown, latched-off state, or soft-stop discharge (for LTC3886-1 variant). The response is set via PMBus MFR_VOUT_OV_FAULT_RESPONSE and stored in EEPROM, ensuring consistent behavior across power cycles.

Can the LTC3886IUKG#PBF operate without an external microcontroller?

Yes, the LTC3886IUKG#PBF can operate autonomously using resistor-based configuration (RCONFIG pins) for VOUT, frequency, phase count, and address - eliminating dependency on firmware. All critical parameters (including loop compensation and fault thresholds) may be set at power-up from internal EEPROM, enabling "set-and-forget" deployment in systems lacking host processors. LTpowerPlay is optional for development and tuning, not required for basic operation.

What thermal sensing options does the LTC3886IUKG#PBF provide?

The LTC3886IUKG#PBF integrates an internal die temperature sensor (±1°C TUE) and supports two external NTC thermistors via TSNS0 and TSNS1 pins. External sensing achieves ±3°C accuracy (MFR_PWM_MODE_LTC3886[5] = 0) and enables board-level hotspot monitoring. Temperature telemetry is continuously converted every 90ms and accessible via PMBus READ_TEMPERATURE_1/2 commands - critical for dynamic thermal management in dense power modules.