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Analog Devices Inc. LTC3883EUH-1#PBF
- Part No.:
- LTC3883EUH-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883EUH-1#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,028
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Product details
Overview
LTC3883EUH-1#PBF 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, integrates 16-bit ADC/12-bit DAC, and enables telemetry read-back of VIN, IIN, VOUT, IOUT, and temperature - used in high-current telecom and intelligent energy-efficient power systems.
For engineers reviewing the LTC3883EUH-1#PBF datasheet, LTC3883EUH-1#PBF pinout, LTC3883EUH-1#PBF application, or LTC3883EUH-1#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters (including 45ns minimum on-time, 250kHz–1MHz programmable switching frequency, and AEC-Q100 qualification), and real-world design implications for digital power management in multi-phase, high-reliability environments.
Technical Context
The LTC3883EUH-1#PBF implements an analog current mode control loop with auto-calibration of inductor DCR and accurate PolyPhase® current sharing across up to six phases. Its integrated high-side current sense amplifier, internal EEPROM with ECC, and fault logging enable autonomous, closed-loop digital supervision without external microcontrollers.
Unlike the LTC3883, the LTC3883EUH-1#PBF uses an external 5V supply (EXTVCC) instead of an internal linear regulator for INTVCC, reducing quiescent power loss and enabling higher efficiency in low-load conditions. It supports Burst Mode®, discontinuous, and continuous conduction modes, with programmable soft-start/stop, sequencing, margining, and OV/UV/OC protection via PMBus commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and telecom rails without pre-regulation |
| VOUT Range | 0.5V to 5.4V - covers core voltages for FPGAs, ASICs, and processors with fine-grained digital margining |
| Output Accuracy | ±0.5% over temperature - ensures stable regulation under thermal stress without manual calibration |
| Min On-Time | 45ns - enables high-frequency operation (up to 1MHz) with high VIN/VOUT ratios and small inductors |
| ADC/DAC Resolution | 16-bit ADC / 12-bit DAC - provides precise telemetry read-back and closed-loop digital servo control |
| Package | 32-lead 5mm × 5mm QFN - thermally enhanced layout with exposed pad for >7°C/W junction-to-board thermal resistance |
| Temp Range | –40°C to +105°C - qualified for extended industrial and automotive under-hood applications |
| PMBus Compliance | Fully compliant with PMBus v1.3 - enables interoperability with LTPowerPlay GUI and multi-device system management |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_SNS | Input voltage sense input | High-impedance differential input for accurate VIN telemetry and UV/OV detection |
| IIN_SNS | Input current sense input | Differential input for measuring total input current using shunt or DCR sensing |
| ISENSE+ | Output current sense positive | Connects to high-side of current-sense resistor or DCR network for IOUT monitoring |
| ISENSE– | Output current sense negative | Reference return for ISENSE+; enables Kelvin connection to minimize PCB trace error |
| TG | Top gate driver output | Drives high-side N-channel MOSFET gate with 30ns rise/fall time and 10ns dead-time control |
| BG | Bottom gate driver output | Drives low-side N-channel MOSFET gate with 20ns rise/fall time and 30ns dead-time control |
| SW | Switch node | Connects to MOSFET bridge midpoint; rated for –5V to 28V transient swing |
| BOOST | Bootstrap supply for TG | Charges external bootstrap capacitor; supports up to 34V relative to SW |
| VSENSE+ | Output voltage sense positive | High-precision feedback input referenced to VSENSE–; supports remote sensing |
| VSENSE– | Output voltage sense negative | Return path for VSENSE+; must be connected near load to reject PCB IR drop |
| ITH | Error amplifier output | Analog control voltage setting duty cycle; accessible for external compensation or monitoring |
| TSNS | External temperature sensor input | Accepts NTC thermistor or diode-connected transistor for board-level thermal monitoring |
| SHARE_CLK | PolyPhase clock output | Drives clock to synchronized phases; enables accurate current sharing across up to 6 controllers |
| ALERT | Open-drain fault indicator | Asserts low on any PMBus-accessible fault (OV, UV, OC, OT); configurable via MFR_ALERT_MASK |
| SDA/SCL | PMBus bidirectional data/clock | Supports 400kHz SMBus timing; includes internal pull-ups and glitch filtering |
| WP | Write-protect enable | Hardware lock for EEPROM writes; prevents accidental configuration changes in field operation |
| GPIO | Configurable general-purpose I/O | Programmable as input (fault input) or open-drain output (sequencing trigger or status flag) |
| PGOOD | Power-good indicator | Open-drain output asserting after VOUT reaches ±10% of target and remains stable for tPGDLY |
| RUN | Enable input | Active-high logic input with 10µs digital filter; initiates soft-start when pulled high |
| VDD33/VDD25 | Internal LDO outputs | 3.3V/2.5V regulated supplies for external circuitry; each includes overvoltage/undervoltage protection |
| SYNC | Frequency synchronization input | Accepts external clock (250kHz–1MHz) to align switching edges across multiple phases |
| FREQ_CFG/VOUT_CFG/ASEL | Resistor-programmed configuration | Set switching frequency, VOUT, and device address via external resistors - retains settings without PMBus |
| DNC | No-connect | Unbonded pins (Pins 24 & 32); must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Digital power system management | Full PMBus v1.3 compliance enables real-time telemetry, fault logging, and firmware-updatable configuration via LTPowerPlay GUI |
| Auto-calibrating DCR current sensing | Eliminates need for precision shunt resistors and manual calibration; compensates for copper temperature drift in real time |
| Integrated EEPROM with ECC | Stores configuration, fault history, and calibration data with error correction - 10,000 write cycles, 10-year retention at ≤125°C |
| AEC-Q100 Grade 2 qualification | Validated for automotive applications (-40°C to +105°C) with enhanced ESD, latch-up, and transient immunity |
| Three operating modes | Selectable Burst Mode® (ultra-low IQ), pulse-skipping (light-load efficiency), or forced CCM (low-noise, predictable ripple) |
| Accurate PolyPhase® current sharing | Enables seamless scaling to 6-phase operation with <±3% phase current mismatch under dynamic load steps |
Applications
| Telecom Power Shelf | AI Accelerator Board |
|---|---|
|
Use Scenario: Distributed 12V-to-0.8V conversion for GPU/ASIC clusters in 19-inch rack-mounted systems. IC Role / Device Role / Timing Role: Primary phase controller managing 4-phase parallel output with synchronized SHARE_CLK and current balancing. Use Value: ±0.5% VOUT accuracy and real-time IOUT telemetry ensure stable rail delivery during rapid AI workload transitions. |
Use Scenario: High-current, low-voltage core supply for PCIe-based AI accelerators requiring tight voltage margins and thermal awareness. IC Role / Device Role / Timing Role: Digital power manager providing programmable soft-start, margining, and external temperature-triggered throttling via TSNS. Use Value: Auto DCR calibration maintains current-sense accuracy across die temperature swings from 40°C to 105°C. |
| Automotive ADAS Domain Controller | Industrial PLC CPU Module |
|
Use Scenario: Powering vision processor SoCs in camera radar fusion units with AEC-Q100 compliance and fault logging. IC Role / Device Role / Timing Role: Fault-resilient controller performing OV/UV/OC response within 35µs and storing event timestamps in EEPROM. Use Value: ALERT pin assertion and PMBus-accessible fault logs simplify root-cause analysis during vehicle diagnostics. |
Use Scenario: Programmable 5V/3.3V/1.2V triple-rail generation for ruggedized PLC CPUs operating in variable ambient temperatures. IC Role / Device Role / Timing Role: Multi-rail sequencer using GPIO and RUN pins to enforce strict power-up/down order per IEC 61000-4-29. Use Value: Resistor-programmed VOUT_CFG/FREQ_CFG ensures deterministic startup even if PMBus interface is disabled. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883EUH#PBF | Includes internal 5V INTVCC regulator; higher IQ than LTC3883EUH-1#PBF due to LDO operation | Better suited for systems lacking clean 5V supply; less efficient at light loads | Select when external 5V rail is unavailable or noisy; verify thermal budget with θJA = 44°C/W |
| MP8770GQ-Z | Monolithic 6A buck with PMBus; no PolyPhase support, lower resolution (12-bit ADC), no EEPROM | Limited to single-phase, lower current, no multi-controller synchronization or persistent fault logging | Choose for cost-sensitive, space-constrained designs where telemetry depth and phase scalability are secondary |
Compared with LTC3883EUH#PBF, the LTC3883EUH-1#PBF reduces standby power by eliminating INTVCC LDO losses, while MP8770GQ-Z trades digital management depth and phase scalability for integration and BOM simplicity - making LTC3883EUH-1#PBF optimal for scalable, telemetry-rich, high-reliability multi-phase systems.
Availability
LTC3883EUH-1#PBF is available at Aetrix Electronics and suitable for telecom power shelves, AI accelerator boards, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-qualified digital power management.
Supply support for LTC3883EUH-1#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3883EUH-1#PBF belongs to the Power by Linear™ digital power controller family, designed specifically for high-efficiency, multi-phase, digitally managed DC/DC conversion in mission-critical infrastructure and intelligent edge systems.
FAQ
What distinguishes LTC3883EUH-1#PBF from LTC3883EUH#PBF?
The LTC3883EUH-1#PBF uses an external 5V supply (EXTVCC) instead of the internal INTVCC linear regulator found in the LTC3883EUH#PBF. This eliminates LDO-related quiescent losses, improving light-load efficiency and thermal performance. Both share identical pinout, PMBus functionality, and PolyPhase capability, but the -1 variant requires a clean 5V rail and lacks the internal regulator's self-contained operation.
Does LTC3883EUH-1#PBF support multi-phase current sharing?
Yes, the LTC3883EUH-1#PBF supports accurate PolyPhase® current sharing across up to six phases using the SHARE_CLK pin and synchronized PWM timing. It achieves <±3% phase current mismatch under dynamic load transients and includes auto-calibration to compensate for MOSFET RDS(on) and inductor DCR drift with temperature.
Can LTC3883EUH-1#PBF operate without a PMBus interface?
Yes, the LTC3883EUH-1#PBF can operate autonomously using resistor-programmed configuration on FREQ_CFG, VOUT_CFG, and ASEL pins. Output voltage, switching frequency, and device address are set at power-up without PMBus communication, making it suitable for systems where digital management is optional or secondary.
What fault telemetry does LTC3883EUH-1#PBF provide via PMBus?
The LTC3883EUH-1#PBF provides real-time PMBus-readback of VIN, IIN, VOUT, IOUT, internal die temperature, and external temperature (via TSNS). It logs faults including output overvoltage/undervoltage, peak overcurrent, input overvoltage, and overtemperature events with timestamps stored in on-chip EEPROM with ECC protection.
Is LTC3883EUH-1#PBF qualified for automotive use?
Yes, the LTC3883EUH-1#PBF is AEC-Q100 Grade 2 qualified (–40°C to +105°C), with enhanced testing for ESD, latch-up, and transient immunity. It meets automotive reliability requirements for ADAS domain controllers and infotainment power systems, and its EEPROM retains configuration data for 10 years at junction temperatures ≤125°C.
LTC3883EUH-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3883EUH-1#PBF FAQ
1.How can I place an order for LTC3883EUH-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883EUH-1#PBF 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-1#PBF reliable?
The price and inventory of LTC3883EUH-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883EUH-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3883EUH-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883EUH-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883EUH-1#PBF?
LTC3883EUH-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883EUH-1#PBF 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-1#PBF?
For technical support, including LTC3883EUH-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883EUH-1#PBF requirements.
6.How does Aetrix verify that LTC3883EUH-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3883EUH-1#PBF 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-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3883EUH-1#PBF?
All LTC3883EUH-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883EUH-1#PBF, 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-1#PBF part is unused and in its original packaging.
Return procedure for LTC3883EUH-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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