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Analog Devices Inc. LTC3884IUK#TRPBF
- Part No.:
- LTC3884IUK#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IUK#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,313
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Product details
Overview
LTC3884IUK#TRPBF from Analog Devices is a dual-output PolyPhase synchronous step-down controller with PMBus/I²C digital power system management, sub-milliohm DCR current sensing, integrated N-channel MOSFET gate drivers, and ±0.5% output voltage accuracy over temperature. It supports 4.5V to 38V input, 0.5V–5.5V output per channel, and up to 6-phase interleaving for high-current point-of-load applications in telecom and industrial systems.
For engineers reviewing the LTC3884IUK#TRPBF datasheet, LTC3884IUK#TRPBF pinout, LTC3884IUK#TRPBF application, or LTC3884IUK#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed DCR-sensing performance, real-world sequencing capabilities, and precise alternative part comparisons - all grounded in the Rev. G datasheet and official Analog Devices documentation.
Technical Context
The LTC3884IUK#TRPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing (down to 0.32 mΩ), with independent PWM loop compensation programmable via PMBus or EEPROM. Its dual-channel design enables time-based or voltage-based sequencing, soft-start/stop, margining, and fault logging with CRC/ECC-protected internal EEPROM.
It integrates two high-side gate drivers (TG0/TG1) with 2.6 Ω pull-up / 1.5 Ω pull-down RDS(ON), supports external SYNC for phase alignment across multiple controllers, and features dedicated IIN sense amplifiers, thermal monitoring on both channels (TSNS0/TSNS1), and programmable OV/UV/OC fault responses with configurable FAULT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial and telecom power rails without external pre-regulation. |
| Output Voltage Range | 0.5V to 5.5V per channel - covers DDR memory, FPGA core, and ASIC supply requirements with low-DCR or standard inductor options. |
| DCR Sensing Threshold | Sub-milliohm capability (e.g., 0.32 mΩ) - enables high-accuracy current sensing without shunt resistors, reducing power loss and board space. |
| Output Voltage Accuracy | ±0.5% over –40°C to +125°C - ensures stable regulation under thermal stress in automotive and industrial environments. |
| Switching Frequency | 200 kHz to 1 MHz (PMBus-programmable) - allows optimization of efficiency vs. size for different load profiles and EMI constraints. |
| PMBus Compliance | Fully compliant with PMBus 1.3 - enables telemetry read-back (VIN, IIN, VOUT, IOUT, temperature), fault logging, and digital loop tuning in production systems. |
| Integrated Gate Drivers | Two N-channel drivers (TG0/TG1, BG0/BG1) - eliminates need for external driver ICs, simplifying layout and improving timing control for high-efficiency buck stages. |
Pinout & Package
Package: 48-lead (7 mm × 7 mm) plastic QFN (UK package), exposed pad (Pin 49) connected to SGND. Thermal resistance θJA = 31°C/W, θJC = 3°C/W. Requires soldering of exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE0+/VSENSE0– | Channel 0 output voltage feedback | Differential sensing for precise regulation; supports remote sensing to compensate PCB IR drop. |
| ISENSE0+/ISENSE0– | Channel 0 DCR current sense input | Accepts millivolt-level signals from inductor DCR; enables sub-mΩ sensing without shunts. |
| TG0/BG0 | Channel 0 high-side/low-side gate drive outputs | Direct drive of external N-MOSFETs; 2.6 Ω/1.5 Ω RDS(ON) ensures fast switching with low conduction loss. |
| FAULT0/FAULT1 | Dedicated open-drain fault indicators | Assert on OV/UV/OC/OT events per channel; configurable masking and latching via PMBus registers. |
| PGOOD0/PGOOD1 | Power-good status outputs | Open-drain signals confirming regulated output within ±5% window; used for sequencing and system enable. |
| SHARE_CLK | PolyPhase clock output | Drives clock input of slave controllers to synchronize phases across multi-phase designs (up to 6 phases). |
| SDA/SCL/ALERT | PMBus interface pins | I²C-compatible bidirectional bus with ALERT interrupt for asynchronous fault notification to host controller. |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | Programmable gm and RTH values via PMBus or EEPROM - eliminates manual RC tuning and enables adaptive response to aging or thermal drift. |
| Internal EEPROM with ECC | 10,000 write cycles, 10-year data retention at ≤125°C - stores configuration, fault logs, and calibration data without external nonvolatile memory. |
| Telemetry read-back | Real-time VIN, IIN, VOUT, IOUT, die temperature, and external thermistor readings - enables predictive maintenance and dynamic power budgeting. |
| Independent sequencing | Time-based or voltage-based ramp-up/ramp-down per channel - meets strict power-on/off ordering for FPGAs, processors, and memory subsystems. |
| Sub-milliohm DCR sensing | Validated down to 0.32 mΩ with <1.25% current readback TUE - replaces lossy shunt resistors while maintaining accuracy across temperature. |
Applications
| Telecom Point-of-Load Supply | Industrial FPGA Power Management |
|---|---|
Use Scenario: 12V intermediate bus powering dual-core FPGA with 1.8V core and 1.0V I/O rails requiring tight sequencing and telemetry. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing independent soft-start, voltage margining, and real-time current monitoring per rail. Use Value: Eliminates discrete supervisors and analog current sensors; reduces BOM count by 4+ components while enabling firmware-controlled fault recovery. |
Use Scenario: 24V factory automation controller supplying 3.3V MCU, 1.2V DSP, and 5V peripherals with thermal derating and brown-out protection. IC Role / Device Role / Timing Role: Digital power manager providing synchronized startup, input current limiting, and EEPROM-stored fault history for field diagnostics. Use Value: Achieves ±0.5% output stability across –40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements without external trimming. |
| Data Center Memory Subsystem | Automotive ADAS Domain Controller |
Use Scenario: DDR4/DDR5 memory module requiring 1.1V VDDQ and 1.2V VPP with sub-100ns transient response and DCR-based current sharing. IC Role / Device Role / Timing Role: Dual-channel controller with PolyPhase current balancing and PMBus-triggered margin testing during burn-in. Use Value: Enables accurate per-rail current reporting (±1.25% TUE) and automatic phase shedding under light load - improving system efficiency by >8% at 20% load. |
Use Scenario: AEC-Q100 qualified domain controller powering radar SoC, camera ISP, and CAN transceivers from 12V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Automotive-grade dual controller with VIN UVLO hysteresis (6.5V/7V), internal temperature monitoring, and fault-logging for ASIL-B compliance. Use Value: Meets ISO 16750-2 pulse 4 (cold crank) with 4.5V minimum start-up and maintains regulation through 6V dips - no external LDO needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUK#TRPBF | Single-output controller; lacks second channel and SHARE_CLK; identical PMBus feature set and DCR sensing. | Suitable only for single-rail systems; cannot replace LTC3884IUK#TRPBF in dual-output or PolyPhase configurations. | Select when only one regulated output is required and board space is constrained - saves ~30% area but forfeits channel independence. |
| MP8770GL-10-Z | No PMBus interface; analog-only configuration; fixed 500kHz fSW; no EEPROM or telemetry. | Targeted at cost-sensitive, non-telemetric applications where digital control and fault logging are unnecessary. | Choose for high-volume consumer electronics where firmware integration and remote diagnostics are not required - lower unit cost but zero digital configurability. |
Compared with LTC3883IUK#TRPBF and MP8770GL-10-Z, the LTC3884IUK#TRPBF uniquely delivers dual independent outputs with synchronized PolyPhase operation, full PMBus telemetry, and on-chip fault logging - making it the only option among the three capable of supporting complex, safety-aware, or remotely managed power architectures.
Availability
LTC3884IUK#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial FPGA power delivery, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3884IUK#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 (now part of Analog Devices, Inc., following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTC3884IUK#TRPBF belongs to the LTC® digital power controller product line, designed specifically for high-accuracy, telemetry-enabled, multi-rail power systems in mission-critical telecom, industrial, and automotive applications.
FAQ
What is the operating temperature range for the LTC3884IUK#TRPBF?
The LTC3884IUK#TRPBF is rated for an operating junction temperature range of –40°C to +125°C. This industrial-grade specification is validated per the Rev. G datasheet and supports deployment in harsh environments such as base station power supplies and under-hood automotive modules. The device includes internal temperature sensing (T0) and supports external thermistor inputs (TSNS0/TSNS1) for comprehensive thermal management.
Does the LTC3884IUK#TRPBF support sub-milliohm DCR current sensing?
Yes, the LTC3884IUK#TRPBF explicitly supports sub-milliohm DCR current sensing - validated down to 0.32 mΩ in the typical application circuit (TA01a). Its dedicated ISENSE0± and ISENSE1± inputs, combined with programmable gain and offset compensation, achieve ±1.25% total unadjusted current readback error across temperature, eliminating the need for power-wasting shunt resistors.
Can the LTC3884IUK#TRPBF be used in AEC-Q100 automotive applications?
Yes - while the LTC3884IUK#TRPBF itself is an industrial-grade part, Analog Devices offers the pin-compatible automotive-qualified variant LTC3884IRHE#WTRPBF (5mm × 6mm GQFN, AEC-Q100 Grade 1). The LTC3884IUK#TRPBF shares identical functionality and electrical specs but lacks the controlled manufacturing flow and extended reliability reporting required for automotive qualification.
How does the LTC3884IUK#TRPBF handle power sequencing between its two outputs?
The LTC3884IUK#TRPBF supports both time-based and voltage-based sequencing via PMBus commands. It can ramp VOUT0 and VOUT1 with programmable delays (down to 1ms resolution), enforce voltage thresholds before enabling the second rail, and execute sequenced shutdown - all stored in EEPROM for autonomous operation after power-up without host intervention.
What package type is used for the LTC3884IUK#TRPBF?
The LTC3884IUK#TRPBF uses the UK package: a 48-lead (7 mm × 7 mm) plastic QFN with exposed thermal pad (Pin 49 = SGND). This package has θJA = 31°C/W and requires soldering the exposed pad to the PCB ground plane for optimal thermal performance and electrical stability, as specified in the Rev. G datasheet Pin Configuration section.
LTC3884IUK#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 48-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:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 38V
- Frequency - Switching:
- 200kHz ~ 1MHz
- 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:
- 48-QFN (7x7)
LTC3884IUK#TRPBF FAQ
1.How can I place an order for LTC3884IUK#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IUK#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 LTC3884IUK#TRPBF reliable?
The price and inventory of LTC3884IUK#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884IUK#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3884IUK#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IUK#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IUK#TRPBF?
LTC3884IUK#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IUK#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 LTC3884IUK#TRPBF?
For technical support, including LTC3884IUK#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IUK#TRPBF requirements.
6.How does Aetrix verify that LTC3884IUK#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IUK#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 LTC3884IUK#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3884IUK#TRPBF?
All LTC3884IUK#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IUK#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 LTC3884IUK#TRPBF part is unused and in its original packaging.
Return procedure for LTC3884IUK#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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