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Analog Devices Inc. LTC3884ERHE#PBF
- Part No.:
- LTC3884ERHE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884ERHE#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:104
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Product details
Overview
LTC3884ERHE#PBF from Analog Devices is a dual-output PolyPhase synchronous step-down DC/DC controller with PMBus-compliant digital power system management, integrated N-channel MOSFET gate drivers, sub-milliohm DCR current sensing, ±0.5% output voltage accuracy over temperature, and 4.5V to 38V input range - deployed in telecom point-of-load and industrial power systems requiring precise telemetry and sequencing.
For engineers reviewing the LTC3884ERHE#PBF datasheet, LTC3884ERHE#PBF pinout, LTC3884ERHE#PBF application, or LTC3884ERHE#PBF equivalent, this page delivers verified package mapping (48-lead 5mm × 6mm GQFN), confirmed pin functions including ITH0/ITH1 for loop compensation, VSENSE0+/VSENSE1− for precision voltage feedback, and FAULT0/FAULT1 for independent fault reporting - all validated against Rev. G datasheet and Analog Devices official documentation.
Technical Context
The LTC3884ERHE#PBF implements a constant-frequency current-mode control architecture optimized for sub-milliohm DCR sensing via dedicated ISENSE0±/ISENSE1± inputs and programmable gain amplifiers. It supports up to six-phase PolyPhase® current sharing using SHARE_CLK synchronization and includes internal EEPROM with ECC for fault logging and configuration storage.
Digital loop compensation is implemented through MFR_PWM_COMP register programming (5-bit RTH and 3-bit gm resolution), enabling real-time tuning without external components. The device features dual independent PWM channels with integrated gate drivers (TG0/TG1, BG0/BG1), each supporting minimum on-time of 60ns and 30ns rise/fall times into 3300pF loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial and telecom rails without external pre-regulation |
| Output Voltage Accuracy | ±0.5% over –40°C to +125°C - enables tight regulation for FPGA and ASIC core supplies |
| DCR Sensing Threshold | Sub-milliohm capable - allows use of low-resistance inductors (e.g., 0.32mΩ) for high-efficiency, high-current designs |
| Gate Driver RDS(ON) | TG high-side: 2.6Ω, BG low-side: 1.1Ω - drives standard N-channel MOSFETs with minimal conduction loss |
| PMBus Interface | Compliant with SMBus 2.0 and PMBus 1.3 - enables telemetry read-back of VIN, IIN, VOUT, IOUT, temperature, and faults |
| EEPROM Retention | 10 years at TJ < 125°C with ECC - ensures reliable storage of configuration, margining, and fault logs across product lifetime |
| Minimum On-Time | 60ns - supports high switching frequencies (up to 1MHz) and high VIN/VOUT ratios (e.g., 12V → 1.8V) |
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 respective output is within ±7.5% of programmed VOUT - enables safe sequencing and system enable logic |
| VSENSE0+ / VSENSE0− VSENSE1+ / VSENSE1− | Differential output voltage sense inputs | High-impedance (50kΩ) Kelvin sensing path with ±0.5% accuracy - rejects PCB trace IR drop for precision regulation |
| ISENSE0+ / ISENSE0− ISENSE1+ / ISENSE1− | Differential current sense inputs | Supports sub-milliohm DCR sensing with programmable gain; zero-code offset ±50µV ensures accuracy at light load |
| TG0 / TG1 BG0 / BG1 | Integrated gate drivers | Drive external N-channel MOSFETs; TG RDS(ON) = 2.6Ω (high), BG RDS(ON) = 1.1Ω (low) - eliminates need for external drivers |
| FAULT0 / FAULT1 | Open-drain fault reporting outputs | Assert low on OV/UV/OC/OT events per channel - supports independent fault isolation and system-level response |
| SHARE_CLK | PolyPhase synchronization clock output | Drives up to 5 slave controllers for 6-phase operation; phase alignment controlled via MFR_PWM_CONFIG[2:0] |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | Programmable gm (3–5.76 mmho) and RTH (0–62 kΩ) via PMBus - replaces external RC networks and enables dynamic tuning |
| Telemetry read-back | Real-time monitoring of VIN, IIN, VOUT, IOUT, die temperature, and external thermistor (TSNS0/TSNS1) with 16-bit VOUT and 10-bit IIN resolution |
| Independent sequencing | Voltage-based or time-based soft-start/stop per channel; programmable ramp rates and delay times - eliminates external timers |
| Internal EEPROM with ECC | Stores configuration, fault logs, and calibration data; 10,000 write cycles, 10-year retention - ensures robust field updates and diagnostics |
| Sub-milliohm DCR sensing | Configurable gain amplifier with ±50µV offset and 1.25% total unadjusted error - enables accurate current measurement with ultra-low DCR inductors |
Applications
| Telecom Point-of-Load Supply | Industrial FPGA Power System |
|---|---|
Use Scenario: Dual-rail power delivery to high-performance telecom ASICs requiring 1.8V @ 30A and 1.0V @ 30A with strict sequencing and telemetry. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent buck stages with synchronized phase interleaving and real-time current/voltage monitoring. Use Value: Sub-milliohm DCR sensing maintains ±1.25% current readback accuracy across load range, while PMBus telemetry enables remote health monitoring and predictive maintenance. |
Use Scenario: Powering Xilinx Kintex Ultrascale+ FPGA with core (0.85V), auxiliary (1.8V), and auxiliary I/O (3.3V) rails in factory automation equipment. IC Role / Device Role / Timing Role: Primary controller for core and auxiliary rails; uses voltage-based sequencing to meet FPGA power-up requirements (VCCINT before VCCAUX). Use Value: ±0.5% VOUT accuracy and programmable soft-start ensure reliable FPGA configuration; internal EEPROM stores margining settings for production test validation. |
| Automotive ADAS Domain Controller | Data Center GPU VRM |
Use Scenario: AEC-Q100 qualified power supply for radar processing SoC in automotive ADAS domain controller operating at –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Dual-output controller delivering 1.0V @ 40A and 1.8V @ 25A with independent fault management and thermal shutdown. Use Value: Integrated temperature sensing (TSNS0/TSNS1) and ±1°C internal TUE enable precise thermal derating; FAULT0/FAULT1 support ASIL-B compliant fault reporting. |
Use Scenario: High-density GPU voltage regulator module in AI accelerator server, requiring 0.75V @ 60A with fast transient response and digital margining. IC Role / Device Role / Timing Role: Master controller in 6-phase PolyPhase configuration using SHARE_CLK to synchronize external LTC3884 slaves. Use Value: Accurate PolyPhase current sharing (<±5% imbalance) and 60ns minimum on-time support high-frequency (500kHz+) operation for compact magnetics and low output ripple. |
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 |
|---|---|---|---|
| LTC3884IRHE#PBF | Same silicon, extended temperature grade (–40°C to +125°C vs. same spec); identical pinout and functionality | No functional difference; selected for higher reliability screening in mission-critical industrial deployments | Choose LTC3884IRHE#PBF when full automotive-grade screening or enhanced burn-in is required beyond standard industrial qualification. |
| LTC3884ERHE-1#PBF | Replaces integrated gate drivers with three-state PWM outputs (PWM0/PWM1); no TG/BG pins; requires external DrMOS or power blocks | Used where higher integration density or lower gate driver losses are needed via discrete DrMOS; incompatible pinout | Select LTC3884ERHE-1#PBF only when migrating to DrMOS-based design - not a drop-in replacement due to missing TG/BG pins and added VCC0/VCC1 pins. |
Compared with LTC3884ERHE#PBF, the LTC3884IRHE#PBF offers identical performance with tighter process controls for long-life industrial systems, while LTC3884ERHE-1#PBF trades integrated drivers for PWM flexibility - requiring board redesign but enabling higher efficiency in DrMOS architectures.
Availability
LTC3884ERHE#PBF is available at Aetrix Electronics and suitable for telecom point-of-load, industrial FPGA power, and automotive ADAS applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3884ERHE#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 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 LTC3884ERHE#PBF belongs to the LTC® Digital Power System Management family, designed specifically for high-reliability, digitally controllable DC/DC conversion in telecom, industrial, and automotive systems demanding telemetry, sequencing, and fault resilience.
FAQ
What is the package type and thermal performance of the LTC3884ERHE#PBF?
The LTC3884ERHE#PBF uses a 48-lead (5mm × 6mm) plastic GQFN package with an exposed SGND pad (Pin 49). Its thermal characteristics include θJA = 31°C/W and θJC = 3.7°C/W, rated for continuous operation from –40°C to +125°C junction temperature. The exposed pad must be soldered to PCB for optimal thermal dissipation and electrical grounding.
Does the LTC3884ERHE#PBF support sub-milliohm DCR current sensing, and how is it implemented?
Yes, the LTC3884ERHE#PBF supports sub-milliohm DCR current sensing via dedicated differential inputs ISENSE0± and ISENSE1±. It employs a programmable-gain amplifier with ±50µV zero-code offset and 1.25% total unadjusted error, enabling accurate current measurement even with inductor DCR as low as 0.32mΩ - critical for high-current, high-efficiency applications.
How does the LTC3884ERHE#PBF handle fault reporting and protection?
The LTC3884ERHE#PBF provides independent fault reporting per channel via open-drain FAULT0 and FAULT1 outputs. It detects and responds to output overvoltage, undervoltage, overcurrent, input overvoltage, and internal/external overtemperature conditions. Faults are logged in internal EEPROM with ECC, and responses (e.g., latch-off or retry) are programmable via PMBus commands.
Can the LTC3884ERHE#PBF be used in AEC-Q100 qualified automotive applications?
Yes - the LTC3884ERHE#PBF is AEC-Q100 qualified for automotive applications. It meets Grade 1 temperature requirements (–40°C to +125°C), includes built-in fault logging, redundant telemetry, and robust EEPROM with ECC - making it suitable for ADAS domain controllers and other safety-critical automotive power systems.
What software tools support configuration and telemetry for the LTC3884ERHE#PBF?
The LTC3884ERHE#PBF is fully supported by Analog Devices' LTpowerPlay® GUI software, which enables real-time configuration, telemetry monitoring, loop compensation tuning, fault logging analysis, and EEPROM programming via USB-to-PMBus adapter. All PMBus 1.3 commands are accessible through this interface.
LTC3884ERHE#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)
LTC3884ERHE#PBF FAQ
1.How can I place an order for LTC3884ERHE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884ERHE#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 LTC3884ERHE#PBF reliable?
The price and inventory of LTC3884ERHE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884ERHE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3884ERHE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884ERHE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884ERHE#PBF?
LTC3884ERHE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884ERHE#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 LTC3884ERHE#PBF?
For technical support, including LTC3884ERHE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884ERHE#PBF requirements.
6.How does Aetrix verify that LTC3884ERHE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3884ERHE#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 LTC3884ERHE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3884ERHE#PBF?
All LTC3884ERHE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884ERHE#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 LTC3884ERHE#PBF part is unused and in its original packaging.
Return procedure for LTC3884ERHE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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