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Analog Devices Inc. LTC3884IRHE#PBF
- Part No.:
- LTC3884IRHE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IRHE#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:112
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Product details
Overview
LTC3884IRHE#PBF 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#PBF datasheet, LTC3884IRHE#PBF pinout, LTC3884IRHE#PBF application, or LTC3884IRHE#PBF equivalent, this page delivers verified technical context, validated pin functions, confirmed digital power management features (telemetry, fault logging, loop compensation), and real-world substitution guidance - all grounded in Analog Devices' Rev. G datasheet and official package documentation.
Technical Context
The LTC3884IRHE#PBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing (down to 0.32 mΩ), enabling precise current monitoring without sense resistors. Its dual independent PWM channels support phase-shifted operation via SYNC and SHARE_CLK, with programmable phasing (0°–300°) and frequency (200–1000 kHz).
Digital power system management includes on-chip EEPROM with ECC for configuration storage, real-time telemetry (VIN, VOUT, IOUT, temperature), and comprehensive fault handling - including OV/UV/OC/OT responses mapped to dedicated FAULT0/FAULT1 pins and PGOOD indicators. Loop compensation is fully programmable via PMBus commands or external RCONFIG resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-range industrial and telecom supplies without external regulators. |
| Output Voltage Range | 0.5V to 5.5V per channel - covers DDR memory, ASIC core, and FPGA I/O rails with low-DCR or resistor-based sensing. |
| Output Accuracy | ±0.5% over –40°C to +125°C - ensures stable regulation across automotive and industrial thermal environments. |
| Switching Frequency | 200 kHz to 1000 kHz - adjustable via PMBus or RCONFIG pins to optimize efficiency vs. size trade-offs. |
| Current Sensing | Sub-milliohm DCR sensing (down to 0.32 mΩ) - eliminates power loss and board space of shunt resistors. |
| Telemetry Resolution | VOUT readback: 16-bit (244 µV LSB); IOUT: 10-bit (15.63–125 µV LSB) - enables precise closed-loop monitoring and diagnostics. |
| EEPROM Endurance | 10,000 write cycles at 0°C–85°C - sufficient for field firmware updates and configuration tuning during product lifecycle. |
Pinout & Package
Package: 48-lead (5mm × 6mm) plastic GQFN (RHE), exposed pad (Pin 49) soldered to SGND for thermal and electrical integrity. θJA = 31°C/W, TJMAX = 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD0 / PGOOD1 | Open-drain power-good indicator | Asserts high-impedance when respective output is within ±5% of programmed voltage - used for sequencing and system enable. |
| FAULT0 / FAULT1 | Dedicated open-drain fault flag | Active-low signal triggered by OV/UV/OC/OT events on Channel 0 or 1 - enables prioritized fault isolation. |
| TG0 / TG1, BG0 / BG1 | N-channel gate drivers (top/bottom) | Integrated 2.6Ω/1.5Ω (TG/BG) RDS(ON) drivers support direct connection to external MOSFETs - no external driver needed. |
| VSENSE0+/–, VSENSE1+/– | Differential output voltage feedback | High-impedance inputs (50 kΩ) with ±0.5% accuracy - reject noise in high-dI/dt POL environments. |
| ISENSE0+/–, ISENSE1+/– | Differential current-sense inputs | Support sub-milliohm DCR sensing with ±1.25% total unadjusted error - critical for accurate load current telemetry. |
| SHARE_CLK | PolyPhase clock output | Drives slave controllers in multi-phase systems - enables precise current sharing across up to six phases. |
| SCL / SDA / ALERT | PMBus 1.3-compatible interface | 400 kHz max I²C speed with CRC protection and bus timeout - ensures robust digital communication in noisy systems. |
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 rework. |
| Internal EEPROM with ECC and fault logging | 10-year data retention at ≤125°C with automatic CRC checks - stores configurations and captures fault history without host intervention. |
| Integrated input current sense amplifier | Configurable gain (2/4/8) and 10-bit readback - enables accurate system-level power budgeting and input overcurrent protection. |
| Accurate PolyPhase current sharing | ±5% matching across up to 6 phases using SHARE_CLK synchronization - maintains thermal balance and reduces ripple in high-current designs. |
| AEC-Q100 qualified | Rated for automotive applications (Grade I: –40°C to +125°C) - meets stress test requirements for under-hood and infotainment systems. |
Applications
| Telecom Point-of-Load Regulation | Industrial FPGA Power Delivery |
|---|---|
Use Scenario: Regulating multiple voltage rails (e.g., 1.2V core, 2.5V I/O) for high-density telecom line cards with strict thermal and efficiency constraints. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent buck stages with synchronized switching and shared current sensing. Use Value: Sub-milliohm DCR sensing eliminates 2–3W of shunt loss per rail; ±0.5% accuracy ensures compliance with ASIC voltage tolerance specs. |
Use Scenario: Powering Xilinx or Intel FPGAs requiring tightly sequenced, low-noise 0.85V core and 1.8V transceiver supplies in factory automation controllers. IC Role / Device Role / Timing Role: Digital power manager executing voltage ramping, soft-start, and time-based sequencing via stored EEPROM profiles. Use Value: Programmable sequencing eliminates external timers; telemetry readback enables real-time health monitoring during runtime. |
| Data Center Memory Subsystem | Automotive ADAS Domain Controller |
Use Scenario: Delivering 1.1V/30A and 1.8V/30A to DDR4/LPDDR4 memory modules in server DIMMs where board space and thermal density are critical. IC Role / Device Role / Timing Role: 6-phase interleaved controller using SHARE_CLK to drive external DrMOS stages - not applicable to LTC3884IRHE#PBF (LTC3884 variant), but leverages same DCR sensing and telemetry. Use Value: 0.32 mΩ DCR compatibility reduces inductor losses by >15% vs. 5 mΩ shunts; 16-bit VOUT readback supports closed-loop margining tests. |
Use Scenario: Supplying safety-critical 1.0V core and 1.8V I/O rails to NVIDIA Orin or TI Jacinto processors in autonomous driving ECUs. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual controller providing fault-logging, OV/UV/OC response, and PGOOD sequencing for ASIL-B compliance. Use Value: Internal EEPROM stores fault logs for diagnostic traceability; ±0.5% accuracy maintains processor stability across –40°C to +125°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3884ERHE#PBF | Same silicon, extended temperature grade (–40°C to +125°C) with identical pinout and functionality - no electrical or timing differences. | Targeted at industrial applications requiring same reliability but without automotive qualification. | Select when AEC-Q100 is unnecessary and cost sensitivity favors commercial-grade variant. |
| LTC3884IRHE-1#PBF | Replaces integrated gate drivers with three-state PWM outputs (PWM0/PWM1) for driving DrMOS or power blocks - different pin mapping (e.g., TG0/TG1 → PWM0/PWM1; VCC0/VCC1 added). | Used where higher-efficiency DrMOS integration is preferred over discrete MOSFETs - requires PCB redesign due to pinout change. | Choose only if migrating to DrMOS topology; not drop-in compatible with LTC3884IRHE#PBF. |
Compared with LTC3884IRHE#PBF, the LTC3884ERHE#PBF offers identical performance at lower cost for non-automotive use, while LTC3884IRHE-1#PBF shifts design focus from discrete FET control to DrMOS optimization - requiring layout changes and firmware adaptation.
Availability
LTC3884IRHE#PBF is available at Aetrix Electronics and suitable for telecom power systems, industrial FPGA power delivery, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LTC3884IRHE#PBF 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 series belongs to Analog Devices' Power by Linear™ digital power management portfolio, designed specifically for high-accuracy, high-density, and telemetry-enabled DC/DC conversion in mission-critical infrastructure and automotive systems.
FAQ
What is the maximum supported switching frequency for the LTC3884IRHE#PBF?
The LTC3884IRHE#PBF supports a programmable switching frequency range of 200 kHz to 1000 kHz, as specified in the PLL SYNC Range parameter (fRANGE). This range is set either via the digital PMBus interface or through external RCONFIG resistors, and remains stable across the full operating temperature range of –40°C to +125°C.
Does the LTC3884IRHE#PBF include internal gate drivers?
Yes, the LTC3884IRHE#PBF integrates N-channel MOSFET gate drivers for both top (TG0/TG1) and bottom (BG0/BG1) switches, with typical RDS(ON) values of 2.6 Ω (TG high) and 1.1 Ω (BG low). This eliminates the need for external drivers when using discrete MOSFETs - a key distinction from the LTC3884-1 variant.
How does the LTC3884IRHE#PBF achieve sub-milliohm DCR current sensing?
The LTC3884IRHE#PBF uses dedicated high-gain, low-offset differential amplifiers on ISENSE0± and ISENSE1± pins, supporting DCR values as low as 0.32 mΩ. Its current-sense architecture includes slope compensation and programmable gain to maintain stability and ±1.25% total unadjusted error - verified in the Electrical Characteristics table under IOUT_TUE.
Is the LTC3884IRHE#PBF AEC-Q100 qualified?
Yes, the LTC3884IRHE#PBF is explicitly rated for automotive applications and listed in the Order Information table as an automotive-grade part (–40°C to +125°C junction temperature). It meets AEC-Q100 Grade 1 requirements, including stress testing for temperature cycling, HTOL, and ESD - confirmed in the official Rev. G datasheet.
Can the LTC3884IRHE#PBF store configurations in non-volatile memory?
Yes, the LTC3884IRHE#PBF includes on-chip EEPROM with ECC support, capable of storing device configuration (voltage, current limits, sequencing, compensation), fault logs, and telemetry history. The EEPROM guarantees 10,000 write cycles and 10-year data retention at temperatures up to 125°C - detailed in the "EEPROM Characteristics" section of the datasheet.
LTC3884IRHE#PBF 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-GQFN (5x6)
LTC3884IRHE#PBF FAQ
1.How can I place an order for LTC3884IRHE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IRHE#PBF 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#PBF reliable?
The price and inventory of LTC3884IRHE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884IRHE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3884IRHE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IRHE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IRHE#PBF?
LTC3884IRHE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IRHE#PBF 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#PBF?
For technical support, including LTC3884IRHE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IRHE#PBF requirements.
6.How does Aetrix verify that LTC3884IRHE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IRHE#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3884IRHE#PBF?
All LTC3884IRHE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IRHE#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3884IRHE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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