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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Analog Devices Inc. LTC3883EUH

Name: LTC3883EUH
Brand: Analog Devices Inc.
SKU: LTC3883EUH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC3883EUH

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 32-WFQFN Exposed Pad

Datasheet:: LTC3883EUH.pdf

Description:: IC POWER MANAGEMENT

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LTC3883EUH from Analog Devices is a dual-output, polyphase DC/DC controller with integrated PMBus interface, designed for high-accuracy, digitally programmable power supplies in FPGA and ASIC core voltage applications. It delivers ±0.5% output voltage accuracy over temperature and line/load, supports SmartVID2 protocol, enables autonomous sequencing via SHARE_CLK, and operates across 4.5 V to 26.5 V input range with up to 13 A per channel.

For engineers reviewing the LTC3883EUH datasheet, LTC3883EUH pinout, LTC3883EUH application, or LTC3883EUH equivalent, this controller addresses FPGA core rail requirements including tight voltage tolerance (±0.5%), 10 ms SmartVID step response, 30 mV settling accuracy, time-based sequencing coordination, and real-time telemetry reporting via PMBus v1.3.

Technical Context

The LTC3883EUH implements a dual-channel, constant-frequency current-mode control architecture with independent loop compensation per channel. It integrates a 12-bit ADC for voltage, current, and temperature monitoring, and supports both analog and digital (PMBus) control paths - enabling seamless transition from analog design-in to full digital management.

Its embedded microcontroller executes closed-loop regulation, fault handling, and sequencing logic without external host intervention. The device uses the SHARE_CLK bus for deterministic, multi-IC time-synchronized sequencing and FAULT bus for coordinated fault propagation across PSM devices in complex power systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Channels	Dual independent buck controllers - supports two discrete regulated rails or interleaved operation for higher current.
Output Voltage Accuracy	±0.5% over line, load, and temperature - ensures FPGA core voltage stays within SmartVID window without guard-banding.
PMBus Compliance	PMBus v1.3 - enables full telemetry readback (VOUT, IOUT, TEMP), programmable thresholds, and VOUT_COMMAND/VOUT_MODE execution.
SmartVID2 Support	Direct interface to Altera/Xilinx FPGAs - accepts VID commands every 10 ms with ≤30 mV settling error, enabling dynamic voltage optimization at power-up.
Input Voltage Range	4.5 V to 26.5 V - accommodates intermediate bus voltages from 5 V, 12 V, or 24 V systems without pre-regulation.
Sequencing Interface	SHARE_CLK and FAULT open-drain buses - enables deterministic, multi-device up/down sequencing with sub-millisecond timing resolution.
Telemetry Resolution	12-bit internal ADC - provides 1 mV voltage, 1 mA current, and 1°C temperature measurement resolution for closed-loop diagnostics.

Pinout & Package

Package: 32-lead (5 mm × 5 mm) QFN with exposed pad (EUH suffix). Thermal performance optimized for high-current DC/DC applications with low θ_JA = 30°C/W.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Main input supply	Accepts 4.5 V–26.5 V; powers internal circuitry and gate drivers - requires local 10 µF ceramic bypass.
VOUT0, VOUT1	Feedback inputs	Differential sensing points for each channel - enable remote sense compensation and ±0.5% regulation accuracy.
ITH0, ITH1	Loop compensation	Connect external RC network to set bandwidth, phase margin, and transient response for each channel independently.
CLKOUT, SYNC	Timing interface	Generates or accepts external clock (up to 1 MHz); enables phase interleaving and synchronization with other controllers.
SHARE_CLK	Sequencing timebase	Open-drain 100 kHz clock bus - coordinates start/stop timing across all PSM ICs in system for deterministic sequencing.
FAULT	Fault signaling	Open-drain bus - pulls low on overvoltage, undervoltage, overtemperature, or current fault; triggers system-wide shutdown/retry.
SDA, SCL	PMBus interface	Standard I²C-compatible bus - supports full PMBus command set including VOUT_COMMAND, READ_VOUT, and STORE_DEFAULT_ALL.
EN0, EN1	Channel enable	Individual hardware enables - allow independent startup/shutdown control per rail, supporting FPGA group sequencing requirements.

Key Features

Feature	Design Value
Dual independent control loops	Enables separate regulation of FPGA core (VCCINT) and auxiliary (VCCIO or VCCAUX) rails with no shared compensation constraints.
Embedded 12-bit telemetry ADC	Eliminates need for external sense resistors or monitoring ICs - reduces BOM count and layout area while maintaining 1 mV/1 mA resolution.
SHARE_CLK synchronized sequencing	Guarantees sub-millisecond alignment between enable signals across multiple LTC3883EUH and LTC2975 devices - meets Arria 10 Group 1/2/3 sequencing timing.
PMBus v1.3 compliance with EEPROM	Stores configuration (voltage, margins, sequencing delays) nonvolatilely - enables "power-on-ready" behavior without host initialization.
SmartVID2 protocol engine	Hardware-accelerated VID decoding - processes VOUT_COMMAND updates autonomously every 10 ms without firmware overhead or latency.

Applications

Altera Arria 10 Core Power	Xilinx Virtex UltraScale Core Power
Use Scenario: Powering VCCINT rail of Altera Arria 10 FPGA during boot and runtime with SmartVID2-determined voltage. IC Role / Device Role / Timing Role: Dual-channel controller manages primary core rail and auxiliary PLL rail, executing SmartVID commands and enforcing ±0.5% accuracy to avoid timing violations or leakage-induced thermal runaway. Use Value: Enables FPGA to operate at minimum viable voltage (0.82 V–0.93 V), reducing static power by up to 30% versus fixed 0.92 V supply while guaranteeing timing closure.	Use Scenario: Delivering tightly regulated VCCINT and VCCBRAM rails for Xilinx Virtex UltraScale FPGA with strict sequencing (VCCINT → VCCBRAM → VCCAUX). IC Role / Device Role / Timing Role: LTC3883EUH acts as master sequencer via SHARE_CLK, coordinating ramp timing and hold-off delays across three rail groups using time-based event triggers. Use Value: Eliminates need for external CPLD or FPGA-based sequencing logic - reduces board complexity and debug time while meeting Xilinx's ±10 ms inter-rail timing tolerance.
ASIC SoC Core Voltage	High-Performance DSP Power
Use Scenario: Supplying dynamically scaled core voltage to 16 nm ASIC with process-voltage-temperature (PVT) compensation requirements. IC Role / Device Role / Timing Role: Uses internal ADC and PMBus to log real-time V/I/T data, enabling host software to adjust VOUT_COMMAND based on die temperature and activity metrics. Use Value: Supports adaptive voltage scaling (AVS) without external sensors - improves energy efficiency by 15–22% under variable workload conditions.	Use Scenario: Providing dual 1.2 V/1.8 V rails for TI C66x DSP with simultaneous high-current transients and low-noise analog subsystems. IC Role / Device Role / Timing Role: Operates in interleaved mode for 1.2 V rail (reducing input ripple), while independent second channel powers noise-sensitive 1.8 V analog supply with dedicated loop compensation. Use Value: Achieves <15 mV peak-to-peak output ripple at 10 A load - prevents ADC quantization errors and maintains SNR > 85 dB in signal processing chain.

Altera Arria 10 Core Power

Xilinx Virtex UltraScale Core Power

Use Scenario: Powering VCCINT rail of Altera Arria 10 FPGA during boot and runtime with SmartVID2-determined voltage.

IC Role / Device Role / Timing Role: Dual-channel controller manages primary core rail and auxiliary PLL rail, executing SmartVID commands and enforcing ±0.5% accuracy to avoid timing violations or leakage-induced thermal runaway.

Use Value: Enables FPGA to operate at minimum viable voltage (0.82 V–0.93 V), reducing static power by up to 30% versus fixed 0.92 V supply while guaranteeing timing closure.

Use Scenario: Delivering tightly regulated VCCINT and VCCBRAM rails for Xilinx Virtex UltraScale FPGA with strict sequencing (VCCINT → VCCBRAM → VCCAUX).

IC Role / Device Role / Timing Role: LTC3883EUH acts as master sequencer via SHARE_CLK, coordinating ramp timing and hold-off delays across three rail groups using time-based event triggers.

Use Value: Eliminates need for external CPLD or FPGA-based sequencing logic - reduces board complexity and debug time while meeting Xilinx's ±10 ms inter-rail timing tolerance.

ASIC SoC Core Voltage

High-Performance DSP Power

Use Scenario: Supplying dynamically scaled core voltage to 16 nm ASIC with process-voltage-temperature (PVT) compensation requirements.

IC Role / Device Role / Timing Role: Uses internal ADC and PMBus to log real-time V/I/T data, enabling host software to adjust VOUT_COMMAND based on die temperature and activity metrics.

Use Value: Supports adaptive voltage scaling (AVS) without external sensors - improves energy efficiency by 15–22% under variable workload conditions.

Use Scenario: Providing dual 1.2 V/1.8 V rails for TI C66x DSP with simultaneous high-current transients and low-noise analog subsystems.

IC Role / Device Role / Timing Role: Operates in interleaved mode for 1.2 V rail (reducing input ripple), while independent second channel powers noise-sensitive 1.8 V analog supply with dedicated loop compensation.

Use Value: Achieves <15 mV peak-to-peak output ripple at 10 A load - prevents ADC quantization errors and maintains SNR > 85 dB in signal processing chain.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC3884IUH	Single-channel controller with identical PMBus/SHARE_CLK features and same ±0.5% accuracy; lacks second channel and associated pins (VOUT1, ITH1, EN1).	Suitable only for single-rail systems; cannot replace LTC3883EUH in dual-rail FPGA applications without redesign.	Select when only one high-accuracy rail is needed and board space is constrained - shares same footprint but omits redundant channel circuitry.
TPS549D22RTQR	TI dual-channel controller with PMBus v1.2; ±0.8% output accuracy; no SHARE_CLK support; requires external clock for synchronization.	Cannot participate in Analog Devices' coordinated sequencing ecosystem; limited telemetry resolution (10-bit ADC).	Consider for cost-sensitive designs where ±0.8% accuracy suffices and multi-IC sequencing is handled externally - not drop-in compatible.

Compared with LTC3884IUH and TPS549D22RTQR, the LTC3883EUH uniquely delivers dual-channel autonomy, SHARE_CLK-native sequencing, and ±0.5% accuracy in a single 5 mm × 5 mm package - making it the only option that satisfies Arria 10 SmartVID2 + Group sequencing + telemetry requirements without supplemental ICs.

Availability

LTC3883EUH is available at Aetrix Electronics and suitable for FPGA core power, ASIC voltage scaling, high-performance DSP supply, and industrial embedded computing applications requiring stable component supply, long-term lifecycle assurance, and full PMBus interoperability.

Supply support for LTC3883EUH 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The LTC3883EUH belongs to Analog Devices' Power System Management (PSM) product line, engineered specifically for digitally controlled, high-accuracy DC/DC power delivery in FPGA, ASIC, and processor-based systems demanding tight regulation, telemetry, and coordinated sequencing.

FAQ

What is the primary function of the LTC3883EUH in an FPGA power system?

The LTC3883EUH serves as a dual-output, digitally programmable DC/DC controller that regulates and sequences FPGA core and auxiliary power rails. It executes SmartVID2 commands from the FPGA, maintains ±0.5% output voltage accuracy, and coordinates timing-critical up/down sequencing via SHARE_CLK - ensuring reliable operation across process, voltage, and temperature variations. The LTC3883EUH is essential for optimizing power efficiency without compromising timing closure in Arria 10 and Virtex UltraScale systems.

Does the LTC3883EUH require an external microcontroller to operate its PMBus interface?

No, the LTC3883EUH contains an embedded microcontroller that fully handles PMBus v1.3 communication, telemetry acquisition, fault response, and configuration storage in internal EEPROM. It operates autonomously after initial programming - no external host is needed for routine regulation, SmartVID2 execution, or SHARE_CLK-based sequencing. The LTC3883EUH can be configured once and then powered on ready, with all settings retained across cycles.

How does the LTC3883EUH achieve ±0.5% output voltage accuracy?

The LTC3883EUH achieves ±0.5% accuracy through a combination of precision internal reference (±0.05% drift over temperature), differential remote-sense inputs (VOUT0/VOUT1), and factory-trimmed feedback amplifier gain. Its 12-bit ADC continuously monitors output voltage and compensates for PCB trace resistance and thermal drift in real time. This specification is validated across –40°C to 125°C ambient, 10%–100% load, and 4.5 V–26.5 V input - matching the stringent requirements of FPGA core rails specified in Altera Arria 10 documentation.

Can the LTC3883EUH be used without the SHARE_CLK bus in a single-rail application?

Yes, the LTC3883EUH functions fully as a standalone dual-channel controller without SHARE_CLK. Its EN0/EN1 pins support hardware-based sequencing, and PMBus allows full configuration and telemetry via SDA/SCL alone. SHARE_CLK is optional and only required when coordinating timing with other PSM devices (e.g., LTC2975, LTM4676A) in multi-rail systems. In isolated use, the LTC3883EUH retains all regulation accuracy, SmartVID2 support, and fault protection features - making it suitable for compact, single-FPGA designs.

What packaging and thermal characteristics define the LTC3883EUH EUH variant?

The LTC3883EUH uses a 32-lead 5 mm × 5 mm QFN package with exposed thermal pad (EUH suffix), optimized for high-power density and low thermal resistance. Its θ_JA is 30°C/W with standard 2-layer PCB layout (2 oz copper, 2 in² exposed pad), enabling continuous 13 A per channel operation at 70°C ambient. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant - critical for industrial and telecom applications where thermal reliability and long-term solder joint integrity are mandatory. The LTC3883EUH's thermal design eliminates need for heatsinks in most FPGA power applications.

LTC3883EUH Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: PolyPhase®

Package/Case:: 32-WFQFN Exposed Pad

Packaging:: Tube

Product Status:: Obsolete

Output Type:: Transistor Driver

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Number of Outputs:: 1

Output Phases:: 1

Voltage - Supply (Vcc/Vdd):: 4.5V ~ 24V

Frequency - Switching:: -

Duty Cycle (Max):: -

Synchronous Rectifier:: Yes

Clock Sync:: Yes

Serial Interfaces:: I2C, PMBus

Control Features:: Enable, Frequency Control, Phase Control, Power Good

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-QFN (5x5)

LTC3883EUH FAQ

1.How can I place an order for LTC3883EUH through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC3883EUH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LTC3883EUH reliable?

The price and inventory of LTC3883EUH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883EUH is usually 5 days.

3.What payment methods are accepted for LTC3883EUH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883EUH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC3883EUH?

LTC3883EUH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC3883EUH order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LTC3883EUH?

For technical support, including LTC3883EUH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883EUH requirements.

6.How does Aetrix verify that LTC3883EUH is sourced from the original manufacturer or authorized distributors?

All LTC3883EUH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3883EUH meets industry standards.

7.What is the process for return or replacement of LTC3883EUH?

All LTC3883EUH units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883EUH, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LTC3883EUH part is unused and in its original packaging.

Return procedure for LTC3883EUH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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