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Analog Devices Inc. LTC3884IRHE#WTRPBF
- Part No.:
- LTC3884IRHE#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IRHE#WTRPBF.pdf
- Description:
- 2X OUT POLYPHBUCK CNTR W/ SUB-MI
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
LTC3884IRHE#WTRPBF from Analog Devices is a dual-output PolyPhase synchronous step-down DC/DC 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–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 LTC3884IRHE#WTRPBF datasheet, LTC3884IRHE#WTRPBF pinout, LTC3884IRHE#WTRPBF application, or LTC3884IRHE#WTRPBF equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed automotive-grade AEC-Q100 qualification, and two rigorously cross-checked alternative parts for digital multiphase controller selection.
Technical Context
The LTC3884IRHE#WTRPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing (down to 0.32 mΩ), with independent programmable loop compensation per channel via digital interface or EEPROM storage. Its dual PWM controllers support phase-shifted operation up to six phases using the SHARE_CLK pin and master/slave synchronization.
It integrates an internal INTVCC regulator (5.5 V ±2.5%), dual VDD33/VDD25 LDOs, input current sense amplifier, and fault-protected open-drain PGOOD/FAULT pins. The device features internal EEPROM with ECC, fault logging, CRC protection, and PMBus-compliant telemetry for VIN, IIN, VOUT, IOUT, and die/external temperature - all accessible via standard PMBus commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 38 V - supports wide-range industrial and automotive battery-fed systems without external pre-regulation. |
| Output Voltage Range | 0.5 V to 5.5 V - configurable per channel; low-DCR mode enables 0.5 V–3.5 V with enhanced current-sense precision. |
| Output Voltage Accuracy | ±0.5 % over –40°C to +125°C - ensures stable core voltage regulation under thermal stress in embedded computing. |
| Switching Frequency | 200 kHz to 1000 kHz - digitally programmable PLL-synchronized frequency enables EMI optimization and phase alignment across multiple controllers. |
| Current Sensing | Sub-milliohm DCR sensing (down to 0.32 mΩ) - eliminates current-sense resistors, reducing power loss and board area in high-efficiency POL designs. |
| Digital Interface | PMBus v1.3 compliant I²C interface - enables full telemetry readback, fault logging, sequencing, margining, and loop compensation tuning in production and field environments. |
| Package | 48-lead 5 mm × 6 mm plastic GQFN (RHE) with exposed SGND pad - thermally enhanced for high-power density layouts in space-constrained telecom modules. |
| AEC-Q100 Grade | Qualified for automotive applications (Grade I: –40°C to +125°C) - meets reliability and qualification requirements for ADAS and infotainment power rails. |
Pinout & Package
Package: 48-lead (5 mm × 6 mm) plastic GQFN (RHE), exposed SGND pad (Pin 49), θJA = 31°C/W, operating junction temperature range –40°C to +125°C.
| 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 safe sequencing and system enable logic. |
| FAULT0 / FAULT1 | Open-drain fault flag | Active-low signal triggered by OV/UV/OC/OT on respective channel; supports fault propagation in multi-rail systems. |
| VSENSE0+/VSENSE0– / VSENSE1+/VSENSE1– | Differential output voltage sense inputs | High-impedance (50 kΩ) Kelvin sensing path enabling accurate remote feedback and rejection of PCB trace IR drop. |
| ISENSE0+/ISENSE0– / ISENSE1+/ISENSE1– | Differential current sense inputs | Supports sub-milliohm DCR or low-value resistor sensing; bias current ±1 µA minimizes error in precision current measurement. |
| TG0/TG1, BG0/BG1 | Integrated N-channel gate drivers | Deliver 2.6 Ω pull-up / 1.5 Ω pull-down RDS(ON); drive external high-side/low-side MOSFETs with 30 ns transition times (3.3 nF load). |
| SHARE_CLK | Phase synchronization clock output | Drives slave controllers to achieve precise phase interleaving (e.g., 60°, 90°, 120° offsets) for ripple cancellation and current sharing. |
| SDA / SCL / ALERT | PMBus I²C bidirectional interface | Compliant with SMBus 3.0 timing; ALERT asserts open-drain interrupt on fault or telemetry event, reducing polling overhead. |
| RUN0 / RUN1 | Enable inputs | Logic-high active; internal 10 µA pull-down allows direct connection to microcontroller GPIO or sequencer outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally programmable loop compensation | Per-channel gm and RTH values set via PMBus or stored in EEPROM - eliminates manual RC tuning and enables adaptive compensation post-deployment. |
| Internal EEPROM with ECC and fault logging | 10,000 write cycles / 10-year data retention at ≤125°C; stores configuration, fault history, and telemetry snapshots for root-cause analysis. |
| Integrated input current sense amplifier | Programmable gain (2×/4×/8×) and 10-bit readback resolution - enables accurate system-level input power monitoring and OCP without external op-amps. |
| Accurate PolyPhase® current sharing | ±1% current matching across up to 6 phases - achieved via synchronized switching, matched gate drivers, and calibrated current sense paths. |
| Telemetry readback | Real-time 16-bit VOUT, 10-bit IOUT/IIN, 0.25°C-resolution temperature - supports closed-loop thermal/power management and predictive maintenance. |
| Programmable soft-start/stop and sequencing | Voltage ramp rate and delay times set digitally - enables controlled power-up of FPGAs, ASICs, and memory subsystems with no external components. |
Applications
| Telecom Point-of-Load Regulation | Automotive ADAS Power Supply |
|---|---|
|
Use Scenario: Regulating 1.8 V @ 60 A for FPGA and SerDes in 5G baseband units with strict ripple and transient response requirements. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two 30 A phases per rail; SHARE_CLK synchronizes with companion LTC3884 for 6-phase total. Use Value: Sub-milliohm DCR sensing reduces heat generation by >1.5 W vs. shunt-based solutions; ±0.5% VOUT accuracy maintains FPGA core stability across chassis temperature swings. |
Use Scenario: Providing tightly regulated 1.0 V and 1.8 V rails for radar processor and image sensor in AEC-Q100-compliant ADAS domain controller. IC Role / Device Role / Timing Role: Automotive-grade dual controller delivering independent sequencing, fault isolation, and real-time telemetry to vehicle diagnostics bus. Use Value: Internal EEPROM stores calibration and fault logs for ISO 26262 ASIL-B traceability; PGOOD/FAULT pins interface directly with safety MCU for fail-safe shutdown. |
| Industrial PLC CPU Core Supply | Data Center Memory Subsystem |
|
Use Scenario: Delivering 0.85 V @ 40 A to ARM-based PLC CPU with dynamic voltage scaling and thermal throttling requirements. IC Role / Device Role / Timing Role: Digital power controller executing voltage margining, temperature-compensated current limits, and soft-stop during firmware updates. Use Value: PMBus telemetry feeds real-time IOUT/VOUT into PLC's HMI for predictive maintenance alerts; ±0.5% accuracy prevents CPU brownouts during burst loads. |
Use Scenario: Generating 1.2 V DDR5 VDD/VDDQ rails with tight tracking and fast transient response in high-density server DIMMs. IC Role / Device Role / Timing Role: Dual-channel controller implementing time-based sequencing between VDD and VDDQ, plus independent OV/UV fault thresholds per rail. Use Value: Programmable loop compensation adapts to aging of output capacitors; 90 ms telemetry update rate enables closed-loop power budgeting at system level. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital multiphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUH#PBF | Single-output controller; lacks second channel, SHARE_CLK, and internal gate drivers - requires external drivers for second phase. | Suitable only for single-rail systems; cannot replicate dual independent regulation or 6-phase interleaving of LTC3884IRHE#WTRPBF. | Select when cost-sensitive single-output digital POL is sufficient and board space allows external driver components. |
| MP2965GQZ-10 | Monolithic dual-output controller with integrated power stages; fixed 500 kHz switching; no EEPROM or fault logging. | Targeted at compact consumer/edge AI modules; lacks PMBus telemetry depth, AEC-Q100 qualification, and programmable compensation. | Choose for space-constrained non-automotive applications where integration outweighs configurability and long-term serviceability. |
Compared with LTC3883IUH#PBF and MP2965GQZ-10, the LTC3884IRHE#WTRPBF uniquely combines dual independent regulation, 6-phase scalability, automotive qualification, EEPROM-based fault history, and full PMBus telemetry - making it the only option for high-reliability, field-upgradable, multi-rail digital power systems.
Availability
LTC3884IRHE#WTRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, automotive ADAS, and industrial PLC applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3884IRHE#WTRPBF 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 LTC3884 product line delivers digitally managed multiphase DC/DC controllers for mission-critical power systems demanding precision regulation, telemetry, fault resilience, and automotive-grade reliability - targeting next-generation compute, networking, and autonomous platforms.
FAQ
What is the primary function of the LTC3884IRHE#WTRPBF in a power system?
The LTC3884IRHE#WTRPBF serves as a dual-output PolyPhase synchronous step-down DC/DC controller with integrated gate drivers and PMBus digital management. It regulates two independent output voltages (e.g., 1.0 V and 1.8 V) with sub-milliohm DCR current sensing, programmable loop compensation, and comprehensive telemetry - enabling precise, adaptive, and monitorable power delivery in telecom, automotive, and industrial systems. Its role centers on high-efficiency, high-accuracy, and field-configurable POL regulation.
Does the LTC3884IRHE#WTRPBF support AEC-Q100 qualification, and what grade does it meet?
Yes, the LTC3884IRHE#WTRPBF is AEC-Q100 qualified for automotive applications. Per Analog Devices' order information table, the "#W" suffix denotes automotive-grade manufacturing control, and the part is specified for –40°C to +125°C operating junction temperature - meeting Grade I requirements. This qualification covers reliability testing including HTOL, TC, UHAST, and ESD, ensuring suitability for ADAS and infotainment power rails.
How does the LTC3884IRHE#WTRPBF implement sub-milliohm DCR current sensing?
The LTC3884IRHE#WTRPBF uses dedicated differential inputs (ISENSE0± and ISENSE1±) with ±1 µA input bias current and programmable gain to measure voltage across low-impedance inductor DCR (as low as 0.32 mΩ). Combined with its constant-frequency current-mode architecture and slope compensation, it achieves stable regulation without external sense resistors - reducing power loss, board area, and thermal stress versus shunt-based methods. Calibration and filtering are handled internally for accuracy.
Can the LTC3884IRHE#WTRPBF operate in a 6-phase configuration, and how is phase alignment achieved?
Yes, the LTC3884IRHE#WTRPBF supports up to 6-phase interleaved operation via its SHARE_CLK pin and master/slave synchronization capability. When configured as master, it generates a phase-aligned clock signal; slave controllers (e.g., additional LTC3884s) lock to this clock and distribute phases (e.g., 0°, 60°, 120°, etc.) using internal PLLs. Phase offset is digitally programmable via MFR_PWM_CONFIG[2:0], enabling optimal ripple cancellation and current sharing across multiple controllers.
What telemetry parameters can be read back from the LTC3884IRHE#WTRPBF via PMBus?
Via its PMBus v1.3-compliant interface, the LTC3884IRHE#WTRPBF provides real-time readback of VIN, IIN, VOUT0/VOUT1, IOUT0/IOUT1, internal die temperature (TSNS0), external temperature (TSNS1), supply currents (INTVCC, VDD33), and fault status registers. Resolution includes 16-bit VOUT (244 µV LSB), 10-bit current (15.63–125 µV LSB depending on range), and 0.25°C temperature steps - all updated every 90 ms and storable in EEPROM for diagnostics.
LTC3884IRHE#WTRPBF 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#WTRPBF FAQ
1.How can I place an order for LTC3884IRHE#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IRHE#WTRPBF 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#WTRPBF reliable?
The price and inventory of LTC3884IRHE#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884IRHE#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3884IRHE#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IRHE#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IRHE#WTRPBF?
LTC3884IRHE#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IRHE#WTRPBF 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#WTRPBF?
For technical support, including LTC3884IRHE#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IRHE#WTRPBF requirements.
6.How does Aetrix verify that LTC3884IRHE#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IRHE#WTRPBF 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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3884IRHE#WTRPBF?
All LTC3884IRHE#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IRHE#WTRPBF, 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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3884IRHE#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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