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Analog Devices Inc. LTC3884EUK#TRPBF
- Part No.:
- LTC3884EUK#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884EUK#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,602
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Product details
Overview
LTC3884EUK#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 current sharing for high-current point-of-load applications in telecom and industrial systems.
For engineers reviewing the LTC3884EUK#TRPBF datasheet, LTC3884EUK#TRPBF pinout, LTC3884EUK#TRPBF application, or LTC3884EUK#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 Analog Devices' Rev. G datasheet and official package documentation.
Technical Context
The LTC3884EUK#TRPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing (down to 0.32 mΩ), enabling accurate sub-milliohm current measurement without sense resistors. Its dual independent PWM channels support programmable phase offset (0°–300°) and synchronized operation via SYNC pin or internal PLL.
Digital loop compensation is implemented through 12-bit programmable transconductance (3–5.76 mmho) and 5-bit RTH selection (0–62 kΩ), stored in on-chip EEPROM with ECC. Telemetry includes real-time readback of VIN, IIN, VOUT, IOUT, die temperature, and external thermistor inputs - all accessible via PMBus commands with CRC protection and fault logging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial and telecom rails without external regulators. |
| Output Voltage Range | 0.5V to 5.5V per channel - configurable in low-DCR mode (0.5V–3.5V) or extended range (0.5V–5.5V). |
| Output Voltage Accuracy | ±0.5% over –40°C to +125°C - enables tight regulation for CPU/GPU core supplies. |
| DCR Sensing Threshold | As low as 0.32 mΩ - eliminates need for power-wasting sense resistors and improves efficiency at high currents. |
| Switching Frequency | 200 kHz to 1 MHz - digitally programmable via resistor or PMBus; supports phase interleaving up to 6 phases. |
| Telemetry Resolution | VOUT: 16-bit (244 µV LSB); IOUT: 10-bit (15.63–125 µV LSB); Temperature: 0.25°C resolution - enables precise closed-loop monitoring. |
| EEPROM Endurance | 10,000 write cycles at 0°C–85°C - sufficient for field calibration, configuration storage, and fault log retention. |
Pinout & Package
Package: 48-lead (7mm × 7mm) plastic QFN (UK package), exposed thermal pad (Pin 49 = SGND), θJA = 31°C/W, operating junction temperature up to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE0+/VSENSE0– | Differential output voltage feedback (Channel 0) | High-impedance (50 kΩ) Kelvin sensing path; enables accurate remote voltage regulation at load. |
| ISENSE0+/ISENSE0– | Differential DCR current sense input (Channel 0) | Supports sub-milliohm inductor sensing; bias current ±1 µA minimizes error contribution. |
| TG0/BG0 | Integrated top/bottom gate drivers (Channel 0) | RDS(ON): TG = 2.6 Ω (pull-up), 1.5 Ω (pull-down); BG = 2.4 Ω (pull-up), 1.1 Ω (pull-down) - drives standard N-MOSFETs directly. |
| SHARE_CLK | PolyPhase current-sharing clock output | Enables master-slave synchronization across up to 6 phases with <30 ns timing skew - ensures balanced load distribution. |
| SDA/SCL/ALERT | PMBus/I²C serial interface pins | Fully compliant with PMBus 1.3; supports 10–400 kHz clock; ALERT is open-drain fault indicator with 3 µs digital filtering. |
| PGOOD0/PGOOD1 | Power-good status outputs | Open-drain, 3.6V-tolerant signals with 60 µs digital filtering - indicate stable regulation per channel after soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | 12-bit gm and 5-bit RTH programmability - allows in-system tuning without hardware changes or external compensation networks. |
| Sub-milliohm DCR sensing | Validated down to 0.32 mΩ inductors - eliminates sense resistor losses and PCB space while maintaining ±1.25% current readback accuracy. |
| Internal EEPROM with ECC | 10,000-cycle endurance, 10-year data retention at ≤125°C - stores configuration, fault logs, and calibration data with error correction. |
| Independent sequencing & margining | Voltage ramp rate, delay, OV/UV/OC thresholds, and margining (±5%) programmable per channel - supports complex multi-rail power-up/down sequences. |
| Integrated input current sense amplifier | Programmable gain (2/4/8), 10-bit readback, ±2% total unadjusted error - enables accurate input power telemetry and system-level efficiency optimization. |
Applications
| Telecom Point-of-Load Supply | Data Center ASIC Core Rail |
|---|---|
|
Use Scenario: Dual-rail 1.8V/1.0V supply for FPGA or network processor with dynamic load steps up to 50A/µs. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent buck stages with synchronized phase interleaving and real-time current telemetry. Use Value: Sub-milliohm DCR sensing maintains ±1.25% current accuracy at 60A/channel; PMBus telemetry enables predictive thermal derating and firmware-controlled margining. |
Use Scenario: High-efficiency 0.85V core supply for AI accelerator with strict ±15mV tolerance and fast transient response. IC Role / Device Role / Timing Role: Digitally managed step-down controller with programmable soft-start, voltage-based sequencing, and ±0.5% output accuracy over temperature. Use Value: Integrated gate drivers reduce external component count; 16-bit VOUT readback (244 µV LSB) supports closed-loop voltage calibration in production test. |
| Industrial PLC Power Module | Automotive ADAS Domain Controller |
|
Use Scenario: Robust 5V/3.3V dual-output supply in harsh environments with wide input (12–36V) and EMI-sensitive analog subsystems. IC Role / Device Role / Timing Role: PMBus-enabled controller providing telemetry, fault logging, and programmable UV/OV/OC protection with independent PGOOD signaling. Use Value: Internal EEPROM stores fault history across power cycles; AEC-Q100 qualified variants available for automotive-grade reliability. |
Use Scenario: Safety-critical 1.2V/1.8V dual rail for radar SoC requiring ASIL-B compliance, thermal monitoring, and fail-safe shutdown. IC Role / Device Role / Timing Role: Dual-channel controller with independent FAULT pins, external temperature sensing (TSNS0/TSNS1), and internal die temperature readback. Use Value: ±1°C internal temperature TUE and ±3°C external thermistor accuracy enable precise thermal throttling; fault propagation via SHARE_CLK supports system-level redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital polyphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3884-1EUK#TRPBF | Replaces integrated gate drivers with three-state PWM outputs (PWM0/PWM1); no TG/BG pins; supports DrMOS and power blocks. | Required when using external DrMOS modules instead of discrete MOSFETs; incompatible with LTC3884's direct-drive topology. | Select LTC3884-1 only if your design uses DrMOS or power stages with built-in drivers - not a drop-in replacement. |
| MP2960AGQSE-LF-Z | Single-chip dual-output controller with integrated MOSFETs (40V, 15A); lacks EEPROM, PMBus telemetry, and sub-milliohm DCR support. | Suitable for cost-sensitive, lower-current (<15A) applications where digital management and precision telemetry are not required. | Choose MP2960 only for compact, self-contained solutions under 15A; it cannot replace LTC3884EUK#TRPBF in high-accuracy, high-current, or telemetry-driven designs. |
Compared with LTC3884-1EUK#TRPBF, the LTC3884EUK#TRPBF provides integrated gate drivers ideal for discrete FET designs, while MP2960AGQSE-LF-Z offers monolithic integration at the expense of programmability, telemetry depth, and DCR-sensing capability - making it unsuitable for precision, high-current, or digitally managed systems.
Availability
LTC3884EUK#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and data center ASIC power delivery requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3884EUK#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets since 1965.
The LTC3884 belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for high-efficiency, digitally managed point-of-load conversion in demanding telecom, computing, and industrial applications.
FAQ
What is the maximum supported number of phases for current sharing with the LTC3884EUK#TRPBF?
The LTC3884EUK#TRPBF supports accurate PolyPhase® current sharing for up to 6 phases using the SHARE_CLK pin for master-slave synchronization. This capability is confirmed in the "PolyPhase Load Sharing" section of the Rev. G datasheet and enables balanced load distribution across multiple parallel buck stages driven by one or more LTC3884EUK#TRPBF controllers.
Does the LTC3884EUK#TRPBF require external components for DCR current sensing?
No - the LTC3884EUK#TRPBF includes dedicated ISENSE0± and ISENSE1± inputs with internal amplification and filtering optimized for sub-milliohm DCR sensing. As shown in the Typical Application schematic (TA01a), only small RC networks (e.g., 220pF + 1kΩ) are needed for noise filtering; no external op-amps or gain-setting resistors are required for basic DCR implementation.
Can the LTC3884EUK#TRPBF operate without an external EEPROM?
Yes - the LTC3884EUK#TRPBF contains internal EEPROM with ECC for storing configuration, fault logs, and calibration data. It does not require an external EEPROM; all PMBus nonvolatile memory commands (STORE_USER_ALL, RESTORE_USER_ALL) operate exclusively on the on-chip memory, as specified in the "NVM Memory Commands" section of the datasheet.
What is the purpose of the EXTVCC pin on the LTC3884EUK#TRPBF?
The EXTVCC pin on the LTC3884EUK#TRPBF allows connection of an external 5V supply to power the INTVCC regulator, reducing power dissipation when VIN exceeds 7V. The device automatically switches between INTVCC and EXTVCC at ~4.7V with 290mV hysteresis, as defined in the Absolute Maximum Ratings and Electrical Characteristics tables of the LTC3884EUK#TRPBF datasheet.
Is the LTC3884EUK#TRPBF pin-compatible with the LTC3884-1EUK#TRPBF?
No - the LTC3884EUK#TRPBF and LTC3884-1EUK#TRPBF are not pin-compatible. The LTC3884EUK#TRPBF features TG0/TG1 and BG0/BG1 driver outputs, while the LTC3884-1EUK#TRPBF substitutes these with PWM0/PWM1 and VCC0/VCC1 pins for driving external DrMOS. Pin configurations differ significantly, as shown in the separate UK and RHE package diagrams in the datasheet.
LTC3884EUK#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)
LTC3884EUK#TRPBF FAQ
1.How can I place an order for LTC3884EUK#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884EUK#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 LTC3884EUK#TRPBF reliable?
The price and inventory of LTC3884EUK#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884EUK#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3884EUK#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884EUK#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884EUK#TRPBF?
LTC3884EUK#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884EUK#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 LTC3884EUK#TRPBF?
For technical support, including LTC3884EUK#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884EUK#TRPBF requirements.
6.How does Aetrix verify that LTC3884EUK#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884EUK#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 LTC3884EUK#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3884EUK#TRPBF?
All LTC3884EUK#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884EUK#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 LTC3884EUK#TRPBF part is unused and in its original packaging.
Return procedure for LTC3884EUK#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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