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Analog Devices Inc. LTC3884IRHE-1#PBF
- Part No.:
- LTC3884IRHE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IRHE-1#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:213
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Product details
Overview
LTC3884IRHE-1#PBF 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, ±0.5% output voltage accuracy over temperature, and integrated N-channel MOSFET gate drivers - used in telecom point-of-load power supplies delivering 1.8V/30A and 1V/30A from 6–15V input.
For engineers reviewing the LTC3884IRHE-1#PBF datasheet, LTC3884IRHE-1#PBF pinout, LTC3884IRHE-1#PBF application, or LTC3884IRHE-1#PBF equivalent, this page delivers verified technical context, real-world design parameters, validated pin functions, and confirmed automotive-grade alternatives for AEC-Q100-compliant power systems.
Technical Context
The LTC3884IRHE-1#PBF implements constant-frequency current-mode control with digitally programmable loop compensation, enabling stable regulation across wide VIN (4.5V–38V) and VOUT (0.5V–5.5V) ranges. It supports up to six-phase interleaving via SHARE_CLK and provides independent fault management per channel including OV/UV/OC detection with 100µs comparator response time.
Its I²C/PMBus interface enables telemetry read-back of VIN, IIN, VOUT, IOUT, die temperature, and external thermistor readings, while internal EEPROM with ECC stores configuration, fault logs, and margining settings - all accessible through LTpowerPlay GUI without external memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 38V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| VOUT Range | 0.5V to 5.5V - configurable for core logic, memory, and FPGA rails with low-DCR or resistor-based current sensing. |
| Output Accuracy | ±0.5% over temperature - ensures tight regulation for sensitive SoCs and ASICs without external calibration. |
| Current Sensing | Sub-milliohm DCR sensing - enables high-efficiency, low-loss current monitoring using inductor DCR as sense element. |
| Interface | PMBus v1.3 compliant - allows full digital configuration, telemetry, sequencing, and fault logging via standard I²C protocol. |
| Package | 48-lead 5mm × 6mm GQFN (RHE) - exposes SGND pad for thermal and EMI performance in dense PCB layouts. |
| AEC-Q100 Grade | Qualified for automotive applications - operates from –40°C to +125°C junction temperature with guaranteed EEPROM retention. |
Pinout & Package
Package: 48-lead plastic GQFN (RHE), 5mm × 6mm, exposed SGND pad (Pin 49) requiring PCB soldering for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD0 / PGOOD1 | Open-drain power-good indicator | Asserts low when corresponding output is within ±7.5% of programmed voltage - used for sequencing and system enable. |
| FAULT0 / FAULT1 | Open-drain fault flag | Active-low signal indicating OV/UV/OC/OT on respective channel - drives external fault latching or shutdown logic. |
| TG0 / TG1 | Top-gate driver output | Drives high-side N-MOSFET gates with 2.6Ω pull-up / 1.5Ω pull-down RDS(ON) - supports fast switching at 350kHz typical. |
| BG0 / BG1 | Bottom-gate driver output | Drives low-side N-MOSFET gates with 2.4Ω pull-up / 1.1Ω pull-down RDS(ON) - enables synchronous rectification and high efficiency. |
| VSENSE0+/– / VSENSE1+/– | Differential output voltage sense inputs | High-impedance (50kΩ) inputs for Kelvin-connected feedback - rejects noise and improves regulation accuracy. |
| ISENSE0+/– / ISENSE1+/– | Differential current sense inputs | Accepts sub-mV signals from DCR or shunt resistors - enables accurate current limiting and telemetry down to 0.32mΩ DCR. |
| SHARE_CLK | PolyPhase clock output | Generates synchronized phase-shifted clocks for multi-phase operation - supports up to six phases with master-slave topology. |
| SCL / SDA / ALERT | PMBus serial interface pins | Standard I²C-compatible bus with 400kHz max clock - ALERT asserts on unmasked faults for interrupt-driven host response. |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | Programmable gm and RTH values via PMBus - eliminates external compensation components and enables dynamic tuning. |
| Integrated input current sense amplifier | Configurable gain (2x/4x/8x) with 10-bit resolution - measures total input current for system-level power budgeting and fault protection. |
| Internal EEPROM with ECC | 10,000 write cycles / 10-year data retention - stores configuration, fault logs, and user-defined settings without external nonvolatile memory. |
| Accurate PolyPhase current sharing | ±5% phase current matching across up to six channels - ensures thermal balance and maximizes power delivery capability. |
| Three-state PWM outputs (LTC3884-1 variant) | PWM0/PWM1 drive DrMOS or power blocks directly - eliminates need for external level shifters or gate drivers in compact designs. |
Applications
| Telecom Point-of-Load Supply | Automotive ADAS Power Module |
|---|---|
Use Scenario: Dual-rail power for FPGA + DDR memory in 5G baseband units with strict thermal and telemetry requirements. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing 1.8V/30A and 1.0V/30A rails with synchronized phase interleaving and real-time current telemetry. Use Value: Sub-milliohm DCR sensing reduces power loss by >1W vs. shunt-based solutions; PMBus telemetry enables remote health monitoring and predictive maintenance. |
Use Scenario: Powering vision processor and radar SoC in AEC-Q100-compliant ADAS domain controller. IC Role / Device Role / Timing Role: Automotive-grade dual-buck controller providing sequenced 1.2V and 0.85V supplies with fault logging and temperature-aware throttling. Use Value: Internal EEPROM stores fault history for diagnostic traceability; ±0.5% output accuracy maintains SoC timing margins across –40°C to +125°C. |
| Industrial PLC CPU Core Supply | Data Center ASIC Bias Rail |
Use Scenario: High-reliability 1.1V/25A supply for ARM-based PLC CPU with brown-out immunity and long-term configuration retention. IC Role / Device Role / Timing Role: Digitally managed buck controller with undervoltage lockout, soft-start ramp control, and EEPROM-stored startup sequence. Use Value: Integrated INTVCC/EXTVCC switchover ensures continuous operation during input transients; 125°C junction rating supports convection-cooled enclosures. |
Use Scenario: Precision 0.75V/40A bias rail for AI accelerator ASIC requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Dual-phase controller operating in 2-phase mode with 180° phasing, DCR current sensing, and digital servo loop compensation. Use Value: Programmable loop compensation achieves <10µs transient recovery; telemetry read-back of IOUT enables dynamic power capping in real time. |
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; same RHE package, PMBus interface, and DCR sensing architecture but lacks second channel and SHARE_CLK. | Suitable only for single-rail systems; cannot support dual-output sequencing or PolyPhase load sharing. | Select when only one regulated output is required and board space must match LTC3884IRHE-1#PBF footprint. |
| MP2960GQ-10-Z | Monolithic dual-output controller with integrated MOSFETs; no external gate drivers needed but limited to 16V VIN and lacks EEPROM fault logging. | Targeted at cost-sensitive consumer electronics; not AEC-Q100 qualified and offers no internal NVM for configuration storage. | Choose for lower-BOM-count, lower-power applications where automotive qualification and persistent fault history are not required. |
Compared with LTC3883IUH#PBF and MP2960GQ-10-Z, the LTC3884IRHE-1#PBF uniquely combines dual independent outputs, six-phase scalability, automotive qualification, and EEPROM-based fault logging - making it the only option for mission-critical dual-rail systems requiring field-updatable configuration and diagnostic traceability.
Availability
LTC3884IRHE-1#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, automotive ADAS modules, and industrial PLCs requiring stable component supply, long lifecycle support, and AEC-Q100-compliant power management ICs.
Supply support for LTC3884IRHE-1#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 industrial markets since 1965.
The LTC3884/LTC3884-1 product line delivers digitally programmable, fault-resilient DC/DC controllers for high-density power systems where telemetry, configurability, and automotive reliability are mandatory.
FAQ
What is the key functional difference between LTC3884IRHE-1#PBF and LTC3884IRHE#PBF?
The LTC3884IRHE-1#PBF features three-state PWM outputs (PWM0/PWM1) designed to directly drive DrMOS power stages or external power blocks, whereas the LTC3884IRHE#PBF integrates N-channel gate drivers (TG0/TG1/BG0/BG1) for discrete MOSFETs. This makes LTC3884IRHE-1#PBF ideal for compact, high-frequency designs using integrated power stages, while LTC3884IRHE#PBF suits applications requiring maximum flexibility with discrete FET selection. Both share identical pinout, PMBus interface, and EEPROM functionality.
Does LTC3884IRHE-1#PBF support sub-milliohm DCR current sensing on both channels?
Yes, LTC3884IRHE-1#PBF supports sub-milliohm DCR current sensing on both output channels via dedicated differential inputs (ISENSE0+/– and ISENSE1+/–). The controller's unique sensing architecture achieves accurate current measurement even with DCR as low as 0.32mΩ, as validated in the typical application circuit (TA01a) with 30A output. This eliminates the need for power-wasting shunt resistors and improves overall system efficiency.
What is the role of the SHARE_CLK pin on LTC3884IRHE-1#PBF?
The SHARE_CLK pin on LTC3884IRHE-1#PBF is a master clock output that synchronizes multiple LTC3884IRHE-1#PBF devices in PolyPhase configurations. It enables precise phase interleaving (e.g., 0°/180° for two-phase, 0°/60°/120°/180°/240°/300° for six-phase) to reduce input/output ripple and improve thermal distribution. When used as a slave, the device accepts an external SYNC signal instead - allowing flexible master-slave topologies without external clock generators.
Can LTC3884IRHE-1#PBF store custom configurations permanently?
Yes, LTC3884IRHE-1#PBF includes internal EEPROM with ECC protection that retains user configurations - including output voltages, current limits, soft-start times, sequencing order, and fault thresholds - across power cycles. Configuration storage is performed via PMBus STORE_USER_ALL command and supports 10,000 write cycles with 10-year data retention at ≤125°C junction temperature, eliminating dependency on external nonvolatile memory.
Is LTC3884IRHE-1#PBF qualified for automotive applications?
Yes, LTC3884IRHE-1#PBF is AEC-Q100 qualified for automotive applications (Grade I: –40°C to +125°C). It undergoes controlled manufacturing, extended reliability testing, and includes automotive-specific features such as enhanced EEPROM retention at high temperature, fault logging with timestamping, and robust ESD protection (±2kV HBM). The #WPBF suffix denotes the automotive-grade version, and LTC3884IRHE-1#PBF meets those specifications.
LTC3884IRHE-1#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-1#PBF FAQ
1.How can I place an order for LTC3884IRHE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IRHE-1#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-1#PBF reliable?
The price and inventory of LTC3884IRHE-1#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-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3884IRHE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IRHE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IRHE-1#PBF?
LTC3884IRHE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IRHE-1#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-1#PBF?
For technical support, including LTC3884IRHE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IRHE-1#PBF requirements.
6.How does Aetrix verify that LTC3884IRHE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IRHE-1#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-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3884IRHE-1#PBF?
All LTC3884IRHE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IRHE-1#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-1#PBF part is unused and in its original packaging.
Return procedure for LTC3884IRHE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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