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Analog Devices Inc. LTC3884IRHE#WPBF
- Part No.:
- LTC3884IRHE#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IRHE#WPBF.pdf
- Description:
- 2X OUT POLYPHBUCK CNTR W/ SUB-MI
- Quantity:
- Payment:
- Shipping:
Inventory:3,165
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Product details
Overview
LTC3884IRHE#WPBF 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 ±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 LTC3884IRHE#WPBF datasheet, LTC3884IRHE#WPBF pinout, LTC3884IRHE#WPBF application, or LTC3884IRHE#WPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade AEC-Q100 qualification, real-world telemetry capabilities (VIN, VOUT, IOUT, temperature, faults), and precise digital loop compensation parameters - all specific to the RHE-package LTC3884 variant.
Technical Context
The LTC3884IRHE#WPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing (down to 0.32mΩ), enabling accurate sub-milliohm current measurement without sense resistors. Its dual independent PWM channels support programmable phasing (0°–300° increments) and synchronized operation via SYNC input or internal PLL.
Digital power system management is enabled through a PMBus 1.3-compliant interface with EEPROM-backed configuration storage (10-year retention), fault logging with ECC, and real-time telemetry readback of VIN, IIN, VOUT, IOUT, and die/external temperatures. Loop compensation is fully programmable via digital registers or external RTH/ITH components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Output Voltage Range | 0.5V to 5.5V per channel - covers core logic, FPGA, ASIC, and memory rails with low-DCR or resistor-based current sensing. |
| Output Voltage Accuracy | ±0.5% over –40°C to +125°C - ensures stable regulation under thermal stress in automotive and industrial environments. |
| DCR Sensing Threshold | Sub-milliohm capability (e.g., 0.32mΩ) - enables high-efficiency, low-loss current sensing using inductor DCR instead of power-wasting shunts. |
| PMBus Compliance | PMBus 1.3 - guarantees interoperability with industry-standard digital power management tools including LTpowerPlay® GUI. |
| Integrated Gate Drivers | N-channel drivers with 2.6Ω TG pull-up / 1.5Ω BG pull-down - directly drives high-side and low-side MOSFETs without external drivers in compact layouts. |
| AEC-Q100 Grade | Qualified for Automotive Applications (Grade 1: –40°C to +125°C) - meets reliability and qualification requirements for under-hood and ADAS power systems. |
| EEPROM Retention | 10 years at TJ < 125°C with ECC - preserves critical configuration, fault logs, and calibration data across product lifecycle without volatile backup. |
Pinout & Package
48-lead (5mm × 6mm) plastic GQFN package (RHE) with exposed SGND pad (Pin 49) requiring PCB soldering for thermal and electrical integrity. θJA = 31°C/W, θJC = 3.7°C/W, TJMAX = 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 sequencing and system-level fault isolation. |
| FAULT0 / FAULT1 | Open-drain fault reporting | Active-low signal triggered by OV/UV/OC/OT on respective channel - supports hardware-level fault propagation to other LTC devices. |
| VSENSE0+/VSENSE0– / VSENSE1+/VSENSE1– | Differential output voltage sense inputs | High-impedance (50kΩ) Kelvin sensing path - eliminates IR drop errors for precision regulation at load. |
| ISENSE0+/ISENSE0– / ISENSE1+/ISENSE1– | Differential current sense inputs | Supports bidirectional sub-milliohm DCR or low-value resistor sensing - enables accurate current telemetry and protection. |
| TG0/TG1, BG0/BG1 | Gate drive outputs | Integrated N-channel drivers with fast 30ns rise/fall times - directly switch external MOSFETs with minimal external components. |
| SHARE_CLK | PolyPhase current-sharing clock | Enables accurate interleaved current sharing across up to six phases - reduces input/output ripple and thermal stress. |
| SDA / SCL / ALERT | PMBus I²C interface | Standard 400kHz PMBus-compliant bus with CRC, timeout protection, and multi-master arbitration - ensures robust digital communication. |
| RUN0 / RUN1 | Enable inputs | Logic-controlled startup sequencing - allows independent channel enable/disable for power-state management and soft-start coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally programmable loop compensation | Adjustable gm (3–5.76 mmho) and RTH (0–62 kΩ) via PMBus - eliminates manual compensation component selection and enables dynamic tuning. |
| Integrated input current sense amplifier | Configurable gain (2/4/8) with 10-bit resolution and ±2% total unadjusted error - provides accurate system-level input power monitoring. |
| Internal EEPROM with ECC and fault logging | Nonvolatile storage for configuration, telemetry history, and fault events - maintains operational integrity after power cycles and supports root-cause analysis. |
| Accurate PolyPhase® current sharing | Supports up to 6 phases with <±1% current mismatch - enables scalable high-current designs while minimizing thermal hotspots and EMI. |
| Telemetry read-back | Real-time readout of VIN, IIN, VOUT, IOUT, die/external temperature with 16-bit VOUT and 10-bit current resolution - enables closed-loop health monitoring and predictive maintenance. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C) with controlled manufacturing - certified for use in safety-critical automotive power systems. |
Applications
| Telecom Point-of-Load | Automotive ADAS Power |
|---|---|
Use Scenario: Regulating 1.8V/30A and 1.0V/30A rails for FPGA and high-speed SerDes in 5G base station line cards. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing phase-interleaved switching, real-time telemetry, and coordinated soft-start/sequencing. Use Value: Sub-milliohm DCR sensing eliminates 3W+ shunt losses; ±0.5% VOUT accuracy ensures signal integrity at 28Gbps data rates. | Use Scenario: Supplying 1.2V/40A and 3.3V/15A to radar processor and camera SoC in autonomous driving ECUs. IC Role / Device Role / Timing Role: AEC-Q100-qualified digital controller providing fault-protected, temperature-compensated regulation with EEPROM-stored safety configurations. Use Value: Internal fault logging and PMBus telemetry enable ASIL-B compliant diagnostics; 125°C junction rating supports under-hood deployment. |
| Industrial PLC CPU Core | Data Center ASIC Supply |
Use Scenario: Delivering tightly regulated 0.85V/50A to ARM-based PLC controller with variable load transients. IC Role / Device Role / Timing Role: Dual-channel controller executing digital servo mode, margining, and time-based sequencing with independent PGOOD/FAULT signaling. Use Value: Programmable loop compensation maintains stability across –40°C to +85°C ambient; 6-phase capability reduces input capacitor count by 60%. | Use Scenario: High-density 0.75V/80A supply for AI accelerator ASIC in OCP-compliant server modules. IC Role / Device Role / Timing Role: Master PolyPhase controller synchronizing up to five slave controllers via SHARE_CLK for coherent multi-rail delivery. Use Value: Accurate current sharing (<±1%) prevents thermal runaway; PMBus telemetry feeds BMC for dynamic power capping and thermal throttling. |
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 |
|---|---|---|---|
| LTC3883IUH#PBF | Single-output controller; no integrated gate drivers; same RHE package and PMBus feature set. | Suitable only for single-rail systems; lacks dual-channel independence and phase synchronization capability. | Select when cost-sensitive single-rail design requires full digital management but not dual-output or PolyPhase scaling. |
| MP2960AUK-LF-P | Monolithic dual-output controller with integrated MOSFETs; 3.5V–24V input; no EEPROM or fault logging. | Lower BOM count for ≤30A/rail; lacks automotive qualification, telemetry depth, and configurability of LTC3884IRHE#WPBF. | Choose for space-constrained consumer or computing applications where digital configurability is secondary to integration. |
Compared with LTC3883IUH#PBF and MP2960AUK-LF-P, the LTC3884IRHE#WPBF uniquely combines dual independent outputs, integrated gate drivers, AEC-Q100 qualification, EEPROM-backed fault logging, and true sub-milliohm DCR sensing - making it the only option for high-reliability, high-current, digitally managed automotive and telecom power systems.
Availability
LTC3884IRHE#WPBF 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#WPBF 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 programmable, fault-resilient, multi-phase DC/DC controllers designed specifically for high-reliability power systems demanding telemetry, configuration persistence, and automotive-grade robustness.
FAQ
What is the package type and thermal specification for LTC3884IRHE#WPBF?
The LTC3884IRHE#WPBF uses a 48-lead plastic GQFN package (5mm × 6mm) with exposed SGND pad (Pin 49). Its thermal characteristics are θJA = 31°C/W and θJC = 3.7°C/W, with maximum junction temperature rated at 125°C. The exposed pad must be soldered to the PCB for optimal thermal performance and electrical grounding - a requirement explicitly stated in the official datasheet Pin Configuration section.
Does LTC3884IRHE#WPBF support AEC-Q100 qualification and what grade does it meet?
Yes, the LTC3884IRHE#WPBF is AEC-Q100 qualified and meets Grade 1 specifications (–40°C to +125°C operating junction temperature). This qualification is confirmed in the Order Information table of the datasheet, where the #WPBF suffix denotes automotive-grade packaging and controlled manufacturing - enabling use in safety-critical automotive power systems such as ADAS and infotainment ECUs.
How does LTC3884IRHE#WPBF implement sub-milliohm DCR current sensing?
The LTC3884IRHE#WPBF achieves sub-milliohm DCR sensing using dedicated differential inputs (ISENSE0± and ISENSE1±) with programmable gain and offset calibration. As documented in the Applications Information section, it supports inductor DCR values as low as 0.32mΩ while maintaining ±1.25% current measurement accuracy - eliminating the need for lossy external sense resistors and preserving conversion efficiency in high-current applications.
What telemetry parameters can be read back from LTC3884IRHE#WPBF via PMBus?
The LTC3884IRHE#WPBF supports real-time PMBus readback of VIN, IIN, VOUT (per channel), IOUT (per channel), die temperature, and external temperature (via TSNS0/TSNS1). Resolution is 16-bit for VOUT, 10-bit for current and temperature, with total unadjusted error specified as ±0.5% for VOUT, ±1.25% for IOUT, and ±1°C for internal temperature - all confirmed in the Electrical Characteristics tables.
Is LTC3884IRHE#WPBF pin-compatible with LTC3884-1 variants?
No, LTC3884IRHE#WPBF is not pin-compatible with LTC3884-1 variants. The LTC3884IRHE#WPBF integrates N-channel gate drivers (TG0/TG1/BG0/BG1 pins), whereas LTC3884-1 substitutes these with three-state PWM outputs (PWM0/PWM1) and VCC0/VCC1 pins. Pin Configuration diagrams confirm distinct pin assignments - for example, Pins 35–36 are TG1/BOOST1 on LTC3884IRHE#WPBF but PWM1/VCC1 on LTC3884IRHE-1#WPBF - requiring different PCB layouts.
LTC3884IRHE#WPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-GQFN (5x6)
LTC3884IRHE#WPBF FAQ
1.How can I place an order for LTC3884IRHE#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IRHE#WPBF 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#WPBF reliable?
The price and inventory of LTC3884IRHE#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884IRHE#WPBF is usually 5 days.
3.What payment methods are accepted for LTC3884IRHE#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IRHE#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IRHE#WPBF?
LTC3884IRHE#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IRHE#WPBF 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#WPBF?
For technical support, including LTC3884IRHE#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IRHE#WPBF requirements.
6.How does Aetrix verify that LTC3884IRHE#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IRHE#WPBF 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#WPBF meets industry standards.
7.What is the process for return or replacement of LTC3884IRHE#WPBF?
All LTC3884IRHE#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IRHE#WPBF, 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#WPBF part is unused and in its original packaging.
Return procedure for LTC3884IRHE#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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