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Analog Devices Inc. LTC3884IRHE#TRPBF
- Part No.:
- LTC3884IRHE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IRHE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,833
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Product details
Overview
LTC3884IRHE#TRPBF from Analog Devices is a dual-output PolyPhase synchronous step-down DC/DC controller with integrated N-channel MOSFET gate drivers, PMBus-compliant I²C interface, sub-milliohm DCR current sensing, and digital power system management. It supports 4.5V–38V input, 0.5V–5.5V output per channel, ±0.5% VOUT accuracy over temperature, and up to 6-phase current sharing for high-current point-of-load applications in telecom and industrial systems.
For engineers reviewing the LTC3884IRHE#TRPBF datasheet, LTC3884IRHE#TRPBF pinout, LTC3884IRHE#TRPBF application, or LTC3884IRHE#TRPBF equivalent, key selection considerations include its integrated gate drivers (vs. LTC3884-1's PWM outputs), 48-lead 5mm × 6mm GQFN package, programmable loop compensation, internal EEPROM with ECC, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC3884IRHE#TRPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing down to 0.32mΩ, enabling precise sub-milliohm current measurement without external sense resistors. Its dual independent control loops support time-based or voltage-based sequencing, soft-start/stop, margining, and real-time telemetry readback of VIN, IIN, VOUT, IOUT, and temperature.
Digital configuration is performed via PMBus commands using LTpowerPlay® GUI, with parameters stored in on-chip EEPROM featuring error-correcting code (ECC) and fault logging. The device integrates INTVCC (5.5V) and VDD33 (3.3V) regulators, supports SYNC input for phase alignment across multiple controllers, and provides independent PGOOD and FAULT signals per output channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial and automotive supply rails without external pre-regulation. |
| Output Voltage Range | 0.5V to 5.5V - configurable per channel via PMBus or resistor programming; low-DCR mode enables 0.5V–3.5V range. |
| Output Accuracy | ±0.5% over –40°C to +125°C - ensures stable regulation under thermal stress in embedded and automotive environments. |
| Current Sensing | Sub-milliohm DCR sensing (down to 0.32mΩ) - eliminates need for power-wasting shunt resistors and improves efficiency at high load currents. |
| Gate Drivers | Integrated N-channel drivers (TG/BG): RDS(ON) = 1.1–2.6Ω, tr/tf = 30ns - directly drives external power MOSFETs without external driver ICs. |
| PMBus Interface | I²C-compatible, 10–400kHz - enables full telemetry, fault logging, and digital loop compensation tuning in production and field operation. |
| EEPROM | On-chip with ECC and 10-year retention at ≤125°C - stores configuration, fault history, and calibration data without external nonvolatile memory. |
Pinout & Package
Package: 48-lead (5mm × 6mm) plastic GQFN with exposed SGND pad (Pin 49), θJA = 31°C/W, rated for –40°C to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD0 / PGOOD1 | Open-drain power-good indicator | Asserts low when corresponding output is within ±7.5% of programmed VOUT; enables sequencing and system monitoring. |
| FAULT0 / FAULT1 | Open-drain fault flag | Active-low signal indicating OV/UV/OC/OT on respective channel; supports fault propagation in multi-controller systems. |
| TG0/TG1, BG0/BG1 | Top/bottom gate drive outputs | Direct-drive outputs for external N-channel MOSFETs; integrated drivers eliminate need for discrete level-shifters or buffers. |
| VSENSE0+/–, VSENSE1+/– | Differential output voltage sense inputs | High-impedance (50kΩ) inputs for Kelvin sensing; enable accurate remote feedback without PCB trace IR drop errors. |
| ISENSE0+/–, ISENSE1+/– | Differential current sense inputs | Support sub-milliohm DCR sensing with ±1µA bias current; reject common-mode noise in high-dI/dt switching nodes. |
| SHARE_CLK | PolyPhase current-sharing clock | Enables accurate interleaved phase synchronization across up to six phases using master-slave topology. |
| SDA / SCL / ALERT | PMBus serial interface pins | Standard I²C-compliant bidirectional bus with CRC protection, bus timeout, and configurable ALERT assertion on fault events. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally programmable loop compensation | Adjustable gm and RTH via PMBus commands - eliminates manual RC tuning and enables adaptive compensation for varying output capacitors or loads. |
| Integrated input current sense amplifier | Configurable gain (2×/4×/8×) with 10-bit resolution - enables accurate total system input power monitoring and redundancy checking. |
| Independent sequencing and margining | Per-channel soft-start, ramp rate, and voltage margining (±5%) - supports complex power-up/down sequences required in FPGAs and ASICs. |
| Internal temperature sensing with external TSNS | ±1°C internal die temp accuracy + ±3°C external thermistor accuracy (TSNS0/TSNS1) - enables thermal derating and fan control without external sensors. |
| AEC-Q100 qualified | Grade I (–40°C to +125°C) qualification - meets automotive reliability requirements for engine control, ADAS, and infotainment subsystems. |
Applications
| Telecom Point-of-Load | Industrial FPGA Power |
|---|---|
Use Scenario: Powering 12V input telecom line cards with dual-core processors and DDR4 memory requiring tightly regulated 1.8V and 1.0V rails. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent buck stages with synchronized phasing and current sharing across four phases. Use Value: Sub-milliohm DCR sensing maintains <±1% current balance across phases while eliminating shunt resistor losses, improving system efficiency by >1.2% at 60A load. | Use Scenario: Supplying configurable logic and transceivers in industrial PLCs where thermal stability and long-term calibration drift must be minimized. IC Role / Device Role / Timing Role: Digitally managed controller providing voltage margining, telemetry readback, and fault logging for predictive maintenance and firmware-over-the-air updates. Use Value: On-chip EEPROM with ECC retains calibrated settings across power cycles and field reprogramming, reducing BOM count and calibration labor by 100% vs. analog-only solutions. |
| Automotive ADAS Domain Controller | Enterprise SSD Power Management |
Use Scenario: Powering vision processing SoCs in camera modules requiring AEC-Q100 compliance, thermal fault response <100µs, and startup sequencing under cold-crank conditions. IC Role / Device Role / Timing Role: Automotive-grade dual controller with undervoltage lockout (VIN UVLO = 3.55V), fast OV/UV comparator response (100µs), and internal temperature monitoring. Use Value: Integrated INTVCC regulator and EXTVCC switchover (4.7V threshold) ensure reliable operation during battery transients, meeting ISO 16750-2 pulse 4 requirements. | Use Scenario: Delivering 3.3V and 1.2V to NVMe SSD controllers and NAND flash arrays in datacenter storage servers with strict power budgeting and telemetry requirements. IC Role / Device Role / Timing Role: PMBus-managed controller providing real-time IIN/VIN telemetry, input current limiting, and fault-triggered graceful shutdown to prevent data corruption. Use Value: Programmable input current limit (via ITHR0/ITHR1) and telemetry readback enable dynamic power capping per slot, supporting PCIe Gen4/Gen5 thermal envelope constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3884-1IRHE#TRPBF | Replaces integrated gate drivers with three-state PWM outputs (PWM0/PWM1) for driving DrMOS or power blocks; no TG/BG pins. | Better suited for designs using integrated power stages; requires external gate drivers for discrete MOSFETs. | Select LTC3884-1 if using DrMOS or power modules; LTC3884IRHE#TRPBF is optimal for discrete FET implementations. |
| TPS546D24ARVFT | Single-output, 60A monolithic buck converter with PMBus; no dual-rail or PolyPhase capability; integrated FETs. | Targeted at space-constrained single-rail applications; lacks independent sequencing, DCR sensing, and multi-phase scalability. | Choose TPS546D24ARVFT only for compact, lower-current single-output use cases where integration outweighs flexibility. |
Compared with LTC3884-1IRHE#TRPBF, the LTC3884IRHE#TRPBF offers direct MOSFET drive capability and higher peak current handling, while TPS546D24ARVFT trades configurability for integration and footprint reduction-making LTC3884IRHE#TRPBF the preferred choice for high-reliability, multi-rail, and scalable PolyPhase designs.
Availability
LTC3884IRHE#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS applications requiring stable component supply, long-lifecycle support, and AEC-Q100-qualified performance.
Supply support for LTC3884IRHE#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC3884 product line delivers digitally programmable, fault-resilient DC/DC controllers for mission-critical power systems demanding telemetry, sequencing, and long-term calibration stability in harsh environments.
FAQ
What is the maximum number of phases supported by the LTC3884IRHE#TRPBF?
The LTC3884IRHE#TRPBF supports accurate PolyPhase current sharing for up to 6 phases using the SHARE_CLK pin and master-slave configuration. This allows scaling output current beyond 100A while maintaining tight phase-to-phase current balance (<±1%) and reduced input/output ripple through interleaving.
Does the LTC3884IRHE#TRPBF require external components for DCR current sensing?
No, the LTC3884IRHE#TRPBF includes dedicated ISENSE0± and ISENSE1± inputs with programmable gain and filtering optimized for sub-milliohm DCR sensing. When paired with low-DCR inductors (e.g., 0.32mΩ), it eliminates the need for external current-sense resistors, reducing power loss and board area.
How is EEPROM data protected against corruption in the LTC3884IRHE#TRPBF?
The LTC3884IRHE#TRPBF incorporates on-chip EEPROM with built-in error-correcting code (ECC) and cyclic redundancy check (CRC) protection for all stored configurations and fault logs. Mass write operations include timeout safeguards, and retention is guaranteed for 10 years at junction temperatures ≤125°C.
Can the LTC3884IRHE#TRPBF operate without a PMBus host controller?
Yes, the LTC3884IRHE#TRPBF can be configured entirely via external resistors on RCONFIG pins (VOUT0_CFG, VOUT1_CFG, FREQ_CFG, PHASE_CFG, ASEL0/1) for standalone operation. PMBus is optional for dynamic reconfiguration, telemetry, and fault logging - not required for basic regulation.
What thermal management features does the LTC3884IRHE#TRPBF provide?
The LTC3884IRHE#TRPBF integrates an internal temperature sensor (±1°C accuracy) and supports two external thermistors via TSNS0 and TSNS1 pins (±3°C accuracy). It enables programmable overtemperature/undertemperature fault responses, thermal derating, and telemetry readback - all accessible via PMBus or stored in EEPROM.
LTC3884IRHE#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-GQFN (5x6)
LTC3884IRHE#TRPBF FAQ
1.How can I place an order for LTC3884IRHE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IRHE#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 LTC3884IRHE#TRPBF reliable?
The price and inventory of LTC3884IRHE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884IRHE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3884IRHE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IRHE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IRHE#TRPBF?
LTC3884IRHE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IRHE#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 LTC3884IRHE#TRPBF?
For technical support, including LTC3884IRHE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IRHE#TRPBF requirements.
6.How does Aetrix verify that LTC3884IRHE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IRHE#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 LTC3884IRHE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3884IRHE#TRPBF?
All LTC3884IRHE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IRHE#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 LTC3884IRHE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3884IRHE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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