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

Analog Devices Inc. LTC3883IUH-1#TRPBF

Name: LTC3883IUH-1#TRPBF
Brand: Analog Devices Inc.
SKU: LTC3883IUH-1#TRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC3883IUH-1#TRPBF

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 32-WFQFN Exposed Pad

Datasheet:: LTC3883IUH-1#TRPBF.pdf

Description:: IC REG CTRLR BUCK PMBUS 32QFN

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Product details

Overview

LTC3883IUH-1#TRPBF from Analog Devices is a PMBus/I²C-compliant, polyphase-capable synchronous step-down DC/DC controller with digital power system management. It delivers ±0.5% output voltage accuracy over temperature, supports 4.5V–24V input and 0.5V–5.4V output ranges, integrates 16-bit ADC/12-bit DAC, and enables telemetry read-back of VIN, IIN, VOUT, IOUT, and temperature in high-current distributed power systems.

For engineers reviewing the LTC3883IUH-1#TRPBF datasheet, LTC3883IUH-1#TRPBF pinout, LTC3883IUH-1#TRPBF application, or LTC3883IUH-1#TRPBF equivalent, this device serves as a digitally programmable, AEC-Q100-qualified controller for precision voltage regulation, sequencing, margining, and fault logging in telecom, industrial, and automotive power rails requiring real-time telemetry and EEPROM-based configuration persistence.

Technical Context

The LTC3883IUH-1#TRPBF implements an analog current-mode control loop with auto-calibration of inductor DCR and integrated high-side current sense amplifier-enabling accurate current sensing without external shunts. Its constant-frequency architecture supports 250kHz–1MHz switching and precise polyphase current sharing across up to six phases via SHARE_CLK synchronization.

Digital management is enabled by a PMBus v1.3-compliant interface with full command support (voltage/current limits, soft-start/stop, OV/UV/OC thresholds, frequency sync), internal EEPROM with ECC and fault logging, and LTPowerPlay GUI integration. Unlike the LTC3883, the LTC3883-1 variant uses an external 5V supply for EXTVCC instead of an internal INTVCC regulator, reducing quiescent power loss.

Key Specifications

Parameter	Value and Actual Design Meaning
VIN Range	4.5V to 24V - supports wide-input industrial and automotive battery-fed rails without pre-regulation.
VOUT Range	0.5V to 5.4V - covers core logic, FPGA, ASIC, and memory supply requirements with fine resolution.
Output Accuracy	±0.5% over temperature - ensures stable voltage regulation under thermal stress without manual trimming.
ADC/DAC Resolution	16-bit ADC / 12-bit DAC - enables high-fidelity telemetry read-back and precise digital servo control of output voltage.
Switching Frequency	250kHz to 1MHz - allows optimization of efficiency vs. size trade-offs using standard low-ESR ceramic capacitors and small inductors.
Min On-Time	45ns - supports high VIN-to-VOUT conversion ratios (e.g., 12V→1.0V) at high frequencies without pulse-skipping instability.
Package	32-lead 5mm × 5mm QFN - thermally enhanced surface-mount package with exposed pad for PCB heat sinking and EMI reduction.
Temp Range	–40°C to +125°C junction - qualified for under-hood automotive and high-ambient industrial applications.

Pinout & Package

32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND). Pin pitch: 0.5mm. RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
VIN_SNS	Input voltage sense input	High-impedance differential input for accurate VIN telemetry and UV/OV supervision.
IIN_SNS	Input current sense input	Differential input for measuring input current via external resistor or DCR network.
ISENSE+	Output current sense positive	Connects to high-side of current-sense resistor or DCR network for IOUT telemetry and OC protection.
ISENSE–	Output current sense negative	Return path for ISENSE+; enables Kelvin connection to minimize PCB trace error.
SYNC	Frequency synchronization input	Accepts external clock (250kHz–1MHz) to phase-lock multiple controllers for reduced EMI and ripple cancellation.
SCL/SDA	PMBus/I²C serial interface	Standard bidirectional bus lines supporting multi-drop topology and hot-plug telemetry access.
ALERT	Open-drain fault indicator	Asserts low on any detected fault (OV, UV, OC, OT, UVLO); configurable via PMBus for latching or sticky behavior.
BOOST/TG/SW/BG	Gate drive and power switch nodes	Drives external N-channel MOSFETs: TG (top gate), BG (bottom gate), BOOST (bootstrap supply), SW (switch node).
VSENSE+/VSENSE–	Output voltage feedback	Differential remote-sense inputs enabling accurate regulation despite PCB IR drop.
ITH	Error amplifier output	Analog compensation node for custom loop tuning; also used for current limit programming via resistor divider.
TSNS	External temperature sensor input	Accepts NTC thermistor or diode-connected transistor for board-level thermal monitoring and derating.
WP	EEPROM write-protect input	Hardware lock for critical NVM registers; prevents accidental firmware corruption during field operation.
PGOOD	Power-good open-drain output	Signals valid VOUT regulation after soft-start; delays assertion until voltage settles within ±1% window.
RUN	Enable input with digital filtering	10µs filtered enable signal; supports sequenced startup/shutdown and brown-out recovery timing.
GPIO	Configurable general-purpose I/O	Programmable as input (fault monitor) or output (status flag, sequencing trigger) via PMBus.
SHARE_CLK	PolyPhase current-sharing clock	Outputs synchronized clock for master-slave phase interleaving across up to 6 controllers.
VDD33/VDD25	Internal LDO outputs	3.3V/2.5V regulated supplies for external circuitry (e.g., ADC reference, level shifters).
INTVCC/EXTVCC	Controller bias supply	LTC3883IUH-1#TRPBF uses EXTVCC (external 5V); no internal INTVCC regulator - reduces standby power.

Key Features

Feature	Design Value
Digital Power System Management	Full PMBus v1.3 compliance enables remote configuration, telemetry, fault logging, and firmware updates without hardware changes.
Auto-Calibrating DCR Current Sense	Eliminates need for precision shunt resistors; compensates for copper temperature drift in inductor windings for stable current limiting.
Integrated EEPROM with ECC	Stores user configurations, calibration data, and fault logs with error correction - survives >10,000 write cycles and retains data ≥10 years at ≤125°C.
Three Operating Modes	Configurable Burst Mode® (ultra-low IQ), pulse-skipping (discontinuous conduction), or forced continuous conduction for optimal light-load efficiency.
AEC-Q100 Qualified	Qualified to Grade 1 (–40°C to +125°C) for automotive powertrain and ADAS subsystems requiring functional safety-aware design.
Accurate PolyPhase® Sharing	Enables precise current balancing across up to six phases using SHARE_CLK and internal current-loop matching - reduces per-phase thermal stress.

Applications

Telecom Base Station PSU	Automotive ADAS Domain Controller
Use Scenario: High-density 48V-to-12V/5V/3.3V/1.8V intermediate bus conversion in 5G macro base station power shelves. IC Role / Device Role / Timing Role: Primary polyphase controller managing up to six parallel phases for 100A+ output rails with real-time telemetry and dynamic margining. Use Value: ±0.5% VOUT accuracy and auto-DCR calibration maintain tight regulation across temperature and load transients, reducing need for post-production trim.	Use Scenario: Centralized power management for radar, camera, and AI processor modules in autonomous driving domain controllers. IC Role / Device Role / Timing Role: AEC-Q100-qualified digital controller providing sequenced startup, fault-protected 1.0V/1.8V/12V rails, and thermal derating via TSNS. Use Value: EEPROM-stored fault logs and PMBus-accessible telemetry simplify field diagnostics and reduce warranty return root-cause analysis time.
Industrial PLC CPU Power	AI Accelerator Board Supply
Use Scenario: Precision 12V-to-1.2V/3.3V conversion for multi-core ARM Cortex-A processors in ruggedized programmable logic controllers. IC Role / Device Role / Timing Role: Digitally managed controller implementing voltage margining, soft-start ramp control, and input current limiting to meet EN 61000-3-2 harmonic standards. Use Value: Programmable OV/UV/OC thresholds and GPIO-triggered shutdown prevent damage during line surges or short-circuit events in unattended factory environments.	Use Scenario: High-current, low-noise 12V-to-0.8V supply for NVIDIA or AMD GPU/AI accelerators in edge inference servers. IC Role / Device Role / Timing Role: Master phase controller synchronizing with slave LTC3883-1 devices to achieve 300A+ output with <±3% inter-phase current imbalance. Use Value: 45ns minimum on-time and 1MHz max frequency enable compact 0.33µH inductors while maintaining stability at 0.8V/200A.

Telecom Base Station PSU

Automotive ADAS Domain Controller

Use Scenario: High-density 48V-to-12V/5V/3.3V/1.8V intermediate bus conversion in 5G macro base station power shelves.

IC Role / Device Role / Timing Role: Primary polyphase controller managing up to six parallel phases for 100A+ output rails with real-time telemetry and dynamic margining.

Use Value: ±0.5% VOUT accuracy and auto-DCR calibration maintain tight regulation across temperature and load transients, reducing need for post-production trim.

Use Scenario: Centralized power management for radar, camera, and AI processor modules in autonomous driving domain controllers.

IC Role / Device Role / Timing Role: AEC-Q100-qualified digital controller providing sequenced startup, fault-protected 1.0V/1.8V/12V rails, and thermal derating via TSNS.

Use Value: EEPROM-stored fault logs and PMBus-accessible telemetry simplify field diagnostics and reduce warranty return root-cause analysis time.

Industrial PLC CPU Power

AI Accelerator Board Supply

Use Scenario: Precision 12V-to-1.2V/3.3V conversion for multi-core ARM Cortex-A processors in ruggedized programmable logic controllers.

IC Role / Device Role / Timing Role: Digitally managed controller implementing voltage margining, soft-start ramp control, and input current limiting to meet EN 61000-3-2 harmonic standards.

Use Value: Programmable OV/UV/OC thresholds and GPIO-triggered shutdown prevent damage during line surges or short-circuit events in unattended factory environments.

Use Scenario: High-current, low-noise 12V-to-0.8V supply for NVIDIA or AMD GPU/AI accelerators in edge inference servers.

IC Role / Device Role / Timing Role: Master phase controller synchronizing with slave LTC3883-1 devices to achieve 300A+ output with <±3% inter-phase current imbalance.

Use Value: 45ns minimum on-time and 1MHz max frequency enable compact 0.33µH inductors while maintaining stability at 0.8V/200A.

Equivalent & Alternatives

The following parts are listed as comparable options for similar DC/DC controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC3883IUH#TRPBF	Includes internal INTVCC 5V regulator; higher quiescent current than LTC3883IUH-1#TRPBF.	Preferred where external 5V rail is unavailable; requires additional thermal management due to higher IQ.	Select when board lacks clean 5V supply but can accommodate ~10mA extra bias current.
MP2965GQ-10-Z	PMBus v1.3 controller with integrated drivers; lower max VIN (16V), no DCR auto-calibration, 10-bit ADC.	Targeted at cost-sensitive telecom/datacom; lacks AEC-Q100 qualification and EEPROM fault logging.	Choose for non-automotive, lower-voltage applications where telemetry depth and automotive reliability are not required.

Compared with LTC3883IUH#TRPBF and MP2965GQ-10-Z, the LTC3883IUH-1#TRPBF offers superior thermal robustness (125°C rating), lower power loss via EXTVCC architecture, and deeper telemetry fidelity (16-bit ADC, ECC EEPROM), making it optimal for mission-critical automotive and industrial designs demanding long-term configuration integrity.

Availability

LTC3883IUH-1#TRPBF is available at Aetrix Electronics and suitable for telecom base station PSUs, automotive ADAS domain controllers, and industrial PLC CPU power systems requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.

Supply support for LTC3883IUH-1#TRPBF 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.

The LTC3883/LTC3883-1 product line delivers digitally programmable, fault-resilient DC/DC controllers for high-reliability power systems requiring real-time telemetry, configuration persistence, and multi-rail sequencing in harsh environments.

FAQ

What is the key functional difference between LTC3883IUH-1#TRPBF and LTC3883IUH#TRPBF?

The LTC3883IUH-1#TRPBF uses an external 5V supply on the EXTVCC pin and omits the internal INTVCC linear regulator, reducing quiescent power consumption and thermal load. In contrast, the LTC3883IUH#TRPBF integrates a 5V INTVCC regulator powered from VIN, increasing IQ by ~10mA but simplifying supply design when no clean 5V rail exists. Both share identical digital features, pinout, and EEPROM functionality.

Does LTC3883IUH-1#TRPBF support polyphase operation with other controller families?

No - LTC3883IUH-1#TRPBF only supports PolyPhase® current sharing with identical LTC3883 or LTC3883-1 devices via the SHARE_CLK pin. It does not interoperate with LTC38xx series variants like LTC3870, LTC3874, or LTC3879 due to incompatible clock timing, phase alignment protocols, and current-sense scaling. For multi-phase designs, all controllers must be LTC3883 or LTC3883-1 units.

How is output voltage accuracy maintained across temperature in LTC3883IUH-1#TRPBF?

LTC3883IUH-1#TRPBF achieves ±0.5% output voltage accuracy over –40°C to +125°C through a combination of on-chip trimming, high-precision bandgap reference, and closed-loop digital servo mode that continuously adjusts the DAC output based on real-time VSENSE+/- measurements. The 16-bit ADC enables sub-mV resolution, and internal calibration routines compensate for offset drift in the error amplifier and feedback path.

Can LTC3883IUH-1#TRPBF operate without PMBus communication enabled?

Yes - LTC3883IUH-1#TRPBF operates autonomously using resistor-programmed defaults for VOUT, switching frequency, and device address. PMBus is optional for runtime reconfiguration, telemetry read-back, and fault logging. If SDA/SCL are left unconnected and WP is pulled high, the device boots from EEPROM-stored settings and functions as a standalone analog controller with full protection features active.

What fault conditions does LTC3883IUH-1#TRPBF monitor and log in its EEPROM?

LTC3883IUH-1#TRPBF monitors and logs overvoltage (OV), undervoltage (UV), overcurrent (OC), overtemperature (OT), undertemperature (UT), input overcurrent, output undercurrent, and bus timeout faults. Each logged event includes timestamp, fault type, severity level, and associated telemetry values (VOUT, IOUT, temperature) at time of occurrence. Fault logs persist across power cycles and are accessible via PMBus READ_EIN command.

LTC3883IUH-1#TRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: PolyPhase®

Package/Case:: 32-WFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

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 ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

LTC3883IUH-1#TRPBF FAQ

1.How can I place an order for LTC3883IUH-1#TRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC3883IUH-1#TRPBF 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 LTC3883IUH-1#TRPBF reliable?

The price and inventory of LTC3883IUH-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883IUH-1#TRPBF is usually 5 days.

3.What payment methods are accepted for LTC3883IUH-1#TRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883IUH-1#TRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC3883IUH-1#TRPBF?

LTC3883IUH-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC3883IUH-1#TRPBF 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 LTC3883IUH-1#TRPBF?

For technical support, including LTC3883IUH-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883IUH-1#TRPBF requirements.

6.How does Aetrix verify that LTC3883IUH-1#TRPBF is sourced from the original manufacturer or authorized distributors?

All LTC3883IUH-1#TRPBF 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 LTC3883IUH-1#TRPBF meets industry standards.

7.What is the process for return or replacement of LTC3883IUH-1#TRPBF?

All LTC3883IUH-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883IUH-1#TRPBF, 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 LTC3883IUH-1#TRPBF part is unused and in its original packaging.

Return procedure for LTC3883IUH-1#TRPBF:

1.Submit a request within 90 days.

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

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