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Analog Devices Inc. LTC3883EUH#PBF
- Part No.:
- LTC3883EUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883EUH#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,374
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Product details
Overview
LTC3883EUH#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 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 LTC3883EUH#PBF datasheet, LTC3883EUH#PBF pinout, LTC3883EUH#PBF application, or LTC3883EUH#PBF equivalent, this device serves as a digitally programmable, fault-logging, current-mode controller for telecom, industrial, and automotive power rails requiring precise sequencing, margining, soft-start/stop, and real-time telemetry via PMBus.
Technical Context
The LTC3883EUH#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 5V linear regulator (INTVCC) enable autonomous operation without external bias supplies.
It supports three light-load operating modes-Burst Mode®, discontinuous (pulse-skipping), and continuous conduction-with minimum on-time of 45ns and switching frequency programmable from 250kHz to 1MHz via resistor or SYNC pin. Fault response includes OV/UV/OC protection with configurable thresholds and logging to nonvolatile memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and automotive battery-fed rails |
| VOUT Range | 0.5V to 5.4V - covers core, I/O, and auxiliary voltages for FPGAs, ASICs, and processors |
| Output Accuracy | ±0.5% over temperature - ensures stable regulation under thermal stress without recalibration |
| ADC/DAC Resolution | 16-bit ADC / 12-bit DAC - enables high-fidelity telemetry and fine-grained digital voltage/current control |
| Switching Frequency | 250kHz to 1MHz - balances efficiency, size, and EMI for compact high-density designs |
| Min On-Time | 45ns - allows high step-down ratios (e.g., 12V→1.0V) at 1MHz without pulse skipping |
| Package | 32-lead 5mm × 5mm QFN - thermally enhanced for high-power density with exposed GND pad |
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 | Enables accurate VIN telemetry and UV/OV supervision independent of main VIN path |
| ISENSE+ | High-side current sense positive input | Connects to shunt or DCR network for precise IOUT measurement and OC protection |
| VSENSE+ | Output voltage feedback positive input | Direct connection to regulated rail for closed-loop servo control and margining |
| TG / BG | Top-gate / bottom-gate drivers | Integrated N-channel MOSFET drivers with 30ns/20ns rise/fall times and 10ns dead-time control |
| SHARE_CLK | PolyPhase clock output | Drives phase synchronization across multiple LTC3883EUH#PBF controllers for interleaved current sharing |
| SCL / SDA | PMBus/I²C bidirectional interface | Supports standard PMBus commands (READ_VOUT, STORE_DEFAULT_ALL, etc.) at up to 400kHz |
| ALERT | Open-drain fault indicator | Asserts low on any enabled fault (OV, UV, OC, OT) for system-level monitoring and shutdown coordination |
| WP | Write-protect enable input | Hardware lock for EEPROM configuration storage - prevents accidental overwrite during field operation |
Key Features
| Feature | Design Value |
|---|---|
| Digital power system management | Full PMBus v1.3 compliance with telemetry, sequencing, margining, and fault logging via LTPowerPlay GUI |
| Auto-calibrating DCR sensing | Eliminates manual calibration for inductor current sensing - adapts to temperature-induced DCR drift |
| Internal EEPROM with ECC | Stores configuration, fault logs, and user-defined settings with error correction for >10,000 write cycles and 10-year retention |
| Three light-load modes | Burst Mode® (ultra-low IQ), pulse-skipping (DCM), and forced CCM - selectable per application efficiency requirements |
| AEC-Q100 qualified | Rated for –40°C to 105°C operation (E-grade) with automotive reliability testing - suitable for ADAS and infotainment rails |
Applications
| Telecom Power Shelf | Industrial PLC CPU Rail |
|---|---|
Use Scenario: Distributed 48V-to-1.2V conversion for multi-core baseband processors in 5G macro base stations. IC Role / Device Role / Timing Role: Primary phase controller in 4-phase PolyPhase® configuration, synchronized via SHARE_CLK to minimize input ripple. Use Value: Real-time telemetry of VOUT/IOUT/temperature enables predictive maintenance and dynamic load-line adjustment per 3GPP specs. | Use Scenario: Programmable 24V-to-3.3V/5V dual-output supply for programmable logic controller (PLC) central processing unit and I/O backplane. IC Role / Device Role / Timing Role: Digitally sequenced controller with soft-start ramp and margining for functional safety compliance (IEC 61508). Use Value: EEPROM-stored fault logs and PMBus-triggered shutdown meet SIL2 diagnostic coverage requirements for industrial automation. |
| Automotive ADAS Domain Controller | High-Density Server VR13 |
Use Scenario: 12V-to-1.8V conversion for radar SoC in AEC-Q100-compliant advanced driver-assistance system domain controller. IC Role / Device Role / Timing Role: Single-phase controller with Burst Mode® operation for ultra-low quiescent current during vehicle sleep mode. Use Value: ±0.5% output accuracy and integrated temperature sensing ensure stable SoC operation across –40°C to 105°C ambient extremes. | Use Scenario: High-efficiency 12V-to-0.8V VR13-compliant supply for AI accelerator cards in cloud data centers. IC Role / Device Role / Timing Role: Master controller in 6-phase PolyPhase® stack, using SYNC pin for frequency locking and phase interleaving. Use Value: 45ns minimum on-time enables 1MHz switching at 15:1 step-down ratio, reducing output capacitance by 40% vs. 500kHz designs. |
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#PBF | Same architecture and pinout; rated for –40°C to 125°C junction temperature (I-grade) | Required for extended-temperature industrial or under-hood automotive use where ambient exceeds 105°C | Select when operating junction temperature must exceed 105°C - no PCB changes needed |
| LTC3883-1EUH#PBF | Omits internal INTVCC regulator; requires external 5V bias supply for lower quiescent power | Preferred in ultra-low-power systems where external 5V rail already exists (e.g., multi-rail PMIC architectures) | Choose for minimal power loss in always-on subsystems - shares same footprint and firmware compatibility |
Compared with LTC3883IUH#PBF, the LTC3883EUH#PBF offers identical functionality at lower cost for commercial-temperature applications, while LTC3883-1EUH#PBF trades internal regulation for reduced IQ - enabling longer battery life in portable or standby-critical designs.
Availability
LTC3883EUH#PBF is available at Aetrix Electronics and suitable for telecom power shelves, industrial PLC CPU rails, automotive ADAS domain controllers, and high-density server VR13 supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3883EUH#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 precision instrumentation, communications, and industrial markets.
The LTC3883EUH#PBF belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for intelligent, telemetry-enabled, high-reliability DC/DC conversion in mission-critical infrastructure and automotive systems.
FAQ
What is the primary function of the LTC3883EUH#PBF in a power system?
The LTC3883EUH#PBF is a digitally managed, synchronous step-down DC/DC controller that regulates output voltage and current using analog current-mode control, while providing full PMBus-based telemetry, sequencing, fault logging, and configuration storage. Its role in the LTC3883EUH#PBF-based system is to serve as the intelligent power management node for high-current, high-accuracy rails - not a complete power module, but a controller requiring external MOSFETs and passive components.
Does the LTC3883EUH#PBF include an internal voltage regulator?
Yes, the LTC3883EUH#PBF integrates an internal 5V linear regulator (INTVCC) capable of delivering up to 100mA, eliminating the need for an external bias supply in most applications. This differs from the LTC3883-1EUH#PBF variant, which omits INTVCC and requires an external 5V source. The INTVCC output powers internal circuitry and can optionally supply gate drivers or auxiliary loads.
How does the LTC3883EUH#PBF achieve accurate current sensing without a shunt resistor?
The LTC3883EUH#PBF supports inductor DCR current sensing with automatic calibration - it measures the voltage drop across the inductor's inherent resistance and compensates for temperature-induced DCR drift using an external temperature sensor (TSNS pin). This eliminates the power loss and board space required by discrete shunt resistors while maintaining ±1% total unadjusted error for IOUT telemetry, as verified in the LTC3883EUH#PBF electrical characteristics table.
Can the LTC3883EUH#PBF operate in single-phase mode, or is PolyPhase® mandatory?
The LTC3883EUH#PBF operates natively in single-phase mode and does not require PolyPhase® configuration. Its "PolyPhase® capable" designation means it can be synchronized with up to five additional LTC3883EUH#PBF or compatible controllers (e.g., LTC3874) via the SHARE_CLK and SYNC pins to form a 2–6 phase interleaved system. In standalone use, all PolyPhase® features remain disabled, and the LTC3883EUH#PBF functions as a fully featured single-phase controller.
What fault protection mechanisms are implemented in the LTC3883EUH#PBF?
The LTC3883EUH#PBF provides comprehensive hardware-based fault protection including output overvoltage (OV), undervoltage (UV), overcurrent (OC), input overvoltage (VIN OV), and overtemperature (OT) detection. Each fault triggers immediate response (e.g., cycle-by-cycle current limiting, latched shutdown, or GPIO assertion) and logs timestamped event data to internal EEPROM with ECC. Fault thresholds are digitally programmable via PMBus, and responses (e.g., retry count, delay, or latch behavior) are configurable in the LTC3883EUH#PBF's NVM memory.
LTC3883EUH#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#PBF FAQ
1.How can I place an order for LTC3883EUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883EUH#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#PBF reliable?
The price and inventory of LTC3883EUH#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3883EUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883EUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883EUH#PBF?
LTC3883EUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883EUH#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#PBF?
For technical support, including LTC3883EUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883EUH#PBF requirements.
6.How does Aetrix verify that LTC3883EUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3883EUH#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3883EUH#PBF?
All LTC3883EUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883EUH#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#PBF part is unused and in its original packaging.
Return procedure for LTC3883EUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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