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Analog Devices Inc. LTC3884IRHE-1#TRPBF
- Part No.:
- LTC3884IRHE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IRHE-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,228
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Product details
Overview
LTC3884IRHE-1#TRPBF from Analog Devices is a dual-output PolyPhase synchronous step-down DC/DC controller with PMBus/I²C 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 voltage range - used in telecom point-of-load power supplies requiring precise telemetry and phase interleaving.
For engineers reviewing the LTC3884IRHE-1#TRPBF datasheet, LTC3884IRHE-1#TRPBF pinout, LTC3884IRHE-1#TRPBF application, or LTC3884IRHE-1#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping (48-lead 5mm × 6mm GQFN), real-world application cards, and two rigorously cross-checked alternative parts for automotive-grade digital POL controllers.
Technical Context
The LTC3884IRHE-1#TRPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-resistance inductor DCR sensing (down to 0.32mΩ), with independent PWM loop compensation per channel programmable via PMBus or EEPROM. It supports up to six-phase interleaving via SHARE_CLK and master/slave synchronization using SYNC input.
It integrates dual high-side gate drivers (TG0/TG1) with 2.6Ω pull-up / 1.5Ω pull-down RDS(ON), internal INTVCC (5.5V) and VDD33 (3.3V) regulators, input current sense amplifier, and fault-protected open-drain PGOOD/FAULT pins - all operating across –40°C to 125°C junction temperature.
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 external pre-regulation. |
| Output Voltage Range | 0.5V to 3.5V (low-DCR mode); 0.5V to 5.5V (standard mode) - enables direct core-voltage regulation for CPUs/FPGAs. |
| Output Voltage Accuracy | ±0.5% over temperature - ensures stable rail tolerance under thermal stress in dense PCB layouts. |
| DCR Sensing Threshold | Sub-milliohm capability (e.g., 0.32mΩ) - eliminates need for lossy sense resistors and improves efficiency at high currents. |
| Telemetry Resolution | VOUT readback: 16-bit (244µV LSB); IOUT readback: 10-bit (15.63–125µV LSB) - enables precise closed-loop monitoring and logging. |
| PMBus Compliance | PMBus v1.3 compliant interface with CRC/ECC-protected EEPROM - supports standardized digital power configuration and fault logging. |
| Operating Temperature | –40°C to +125°C junction - qualified for AEC-Q100 Grade 1 automotive applications and harsh industrial environments. |
Pinout & Package
Package: 48-lead plastic GQFN (5mm × 6mm), exposed pad (Pin 49) connected to SGND - requires soldering to PCB for thermal and electrical integrity (θJA = 31°C/W).
| 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 sequencing and system-level fault isolation. |
| FAULT0 / FAULT1 | Open-drain fault reporting | Active-low signal triggered by OV/UV/OC/OT on Channel 0 or 1 - supports cascaded fault propagation in multi-rail systems. |
| TG0 / TG1 | High-side gate driver output | Drives N-channel MOSFET gates with 2.6Ω pull-up / 1.5Ω pull-down RDS(ON) - supports fast switching at 350kHz typical fSW. |
| ISENSE0+/– / ISENSE1+/– | Differential current sense inputs | Accepts sub-mV signals from DCR or sense resistors - enables accurate current measurement down to 0.32mΩ DCR. |
| VSENSE0+/– / VSENSE1+/– | Differential output voltage feedback | High-impedance (50kΩ) inputs with ±0.5% accuracy - rejects noise in high-current POL feedback paths. |
| SDA / SCL / ALERT | PMBus I²C interface | Supports 10–400kHz clock, CRC-protected transactions, and interrupt-driven telemetry alerts - compatible with LTpowerPlay GUI. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM channels | Each with programmable soft-start, margining, sequencing, and OV/UV/OC protection - enables asymmetric rail control for SoC+FPGA power domains. |
| Digitally adjustable loop compensation | 12-bit gm amplifier gain and 5-bit RTH resistor selection - eliminates external compensation components and enables in-system tuning. |
| Integrated EEPROM with ECC | 10,000 write cycles / 10-year data retention - stores configuration, fault logs, and calibration data without external memory. |
| Internal input current sense amplifier | Configurable gain (2x/4x/8x) with 10-bit readback - provides system-level input power telemetry for thermal and safety monitoring. |
| PolyPhase® current sharing | Accurate interleaving across up to 6 phases using SHARE_CLK - reduces input/output ripple and improves thermal distribution in high-current designs. |
Applications
| Telecom Point-of-Load Supply | Automotive ADAS Power Module |
|---|---|
|
Use Scenario: 1.8V/30A and 1.0V/30A dual-rail supply for baseband processor and AI accelerator in 5G remote radio unit. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing phase-interleaved buck stages with real-time telemetry and fault logging via PMBus. Use Value: Sub-milliohm DCR sensing eliminates 3W+ sense resistor losses; ±0.5% VOUT accuracy maintains SoC timing margins under load transients. |
Use Scenario: Redundant 1.2V/25A and 3.3V/15A rails for radar ECU in AEC-Q100-compliant vehicle domain controller. IC Role / Device Role / Timing Role: Automotive-qualified digital controller providing synchronized startup, voltage margining, and overtemperature shutdown with EEPROM-stored fault history. Use Value: Internal INTVCC/VDD33 regulators reduce BOM count; –40°C to 125°C operation ensures reliability in engine bay thermal cycling. |
| Datacenter ASIC Power Delivery | Industrial FPGA Power System |
|
Use Scenario: High-efficiency 0.85V/60A supply for AI inference ASIC using 6-phase interleaving and dynamic voltage scaling. IC Role / Device Role / Timing Role: Master controller coordinating multiple LTC3884-1 devices via SHARE_CLK and SYNC for precise phase alignment and current balancing. Use Value: Programmable loop compensation adapts to varying output capacitance; telemetry readback enables predictive thermal derating before throttling. |
Use Scenario: Configurable 1.2V/20A and 2.5V/10A rails for Xilinx Kintex Ultrascale+ FPGA with strict sequencing and inrush control. IC Role / Device Role / Timing Role: Digital power manager executing time-based and voltage-based sequencing, soft-start ramping, and brownout recovery. Use Value: Independent RUN0/RUN1 enables staggered enable; PGOOD outputs feed FPGA INIT_B and PROGRAM_B for safe configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital POL controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUH#TRPBF | Single-output controller; no integrated gate drivers; supports only one VOUT channel with identical PMBus features. | Suitable for simpler single-rail systems; lacks dual-channel telemetry and independent fault handling per rail. | Select when only one regulated output is required and board space allows discrete driver implementation. |
| MP8770GQ-10-Z | Monolithic dual-buck IC (integrated MOSFETs); no PMBus; analog-only control; max 17V input; no EEPROM or telemetry. | Cost-sensitive, non-digital applications where firmware-based configuration and fault logging are unnecessary. | Choose for fixed-function, high-volume consumer applications where digital management adds no value. |
Compared with LTC3884IRHE-1#TRPBF, LTC3883IUH#TRPBF reduces functionality to single-rail control but retains full PMBus telemetry, while MP8770GQ-10-Z trades configurability and diagnostics for integration and lower BOM cost - making each suitable only for distinctly different design priorities.
Availability
LTC3884IRHE-1#TRPBF is available at Aetrix Electronics and suitable for telecom point-of-load supplies, automotive ADAS modules, and industrial FPGA power systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3884IRHE-1#TRPBF 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 belongs to Analog Devices' Power by Linear™ digital power management product line, designed specifically for high-reliability, telemetry-enabled POL applications in telecom infrastructure, automotive electronics, and datacenter hardware.
FAQ
What is the key functional difference between LTC3884IRHE-1#TRPBF and LTC3884IRHE#TRPBF?
The LTC3884IRHE-1#TRPBF features three-state PWM outputs (PWM0/PWM1) designed to drive external DrMOS power stages or power blocks, whereas the standard LTC3884IRHE#TRPBF integrates high-side gate drivers (TG0/TG1) for discrete MOSFETs. This makes the -1 variant ideal for compact, high-density DrMOS-based designs where driver integration resides in the power stage.
Does LTC3884IRHE-1#TRPBF support AEC-Q100 qualification?
Yes, LTC3884IRHE-1#TRPBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C). Its internal EEPROM with ECC, fault logging, and robust thermal protection make it suitable for ADAS ECUs and domain controllers requiring automotive reliability standards.
Can LTC3884IRHE-1#TRPBF operate without an external EEPROM?
Yes. LTC3884IRHE-1#TRPBF includes on-chip EEPROM with 10,000 write cycles and 10-year data retention. All configuration parameters - including VOUT setpoints, compensation values, sequencing delays, and fault thresholds - can be stored internally without external memory.
What is the minimum DCR value supported by LTC3884IRHE-1#TRPBF for accurate current sensing?
LTC3884IRHE-1#TRPBF supports sub-milliohm DCR sensing down to 0.32mΩ, as validated in the typical application circuit (TA01a) with 0.33µH inductors. This enables high-efficiency current measurement without power-wasting sense resistors in high-current POL applications.
How does the SHARE_CLK pin enable PolyPhase operation in LTC3884IRHE-1#TRPBF?
The SHARE_CLK pin synchronizes multiple LTC3884IRHE-1#TRPBF devices in master-slave configuration, enabling precise phase interleaving across up to six total phases. When configured as slave, the device locks its switching frequency and phase offset to the master's SHARE_CLK signal - reducing input/output ripple and improving thermal balance.
LTC3884IRHE-1#TRPBF 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-1#TRPBF FAQ
1.How can I place an order for LTC3884IRHE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IRHE-1#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3884IRHE-1#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3884IRHE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IRHE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IRHE-1#TRPBF?
LTC3884IRHE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IRHE-1#TRPBF 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#TRPBF?
For technical support, including LTC3884IRHE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IRHE-1#TRPBF requirements.
6.How does Aetrix verify that LTC3884IRHE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IRHE-1#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3884IRHE-1#TRPBF?
All LTC3884IRHE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IRHE-1#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3884IRHE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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