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Analog Devices Inc. LTC3884ERHE-1#PBF
- Part No.:
- LTC3884ERHE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884ERHE-1#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
LTC3884ERHE-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, and integrated three-state PWM outputs for driving DrMOS or power blocks. It supports 4.5V to 38V input, 0.5V–5.5V output per channel, ±0.5% VOUT accuracy over temperature, and up to 6-phase current sharing in telecom and industrial point-of-load systems.
For engineers reviewing the LTC3884ERHE-1#PBF datasheet, LTC3884ERHE-1#PBF pinout, LTC3884ERHE-1#PBF application, or LTC3884ERHE-1#PBF equivalent, key selection criteria include its DrMOS-compatible three-state PWM interface, programmable loop compensation via digital interface or EEPROM, independent fault management per channel (OV/UV/OC/OT), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC3884ERHE-1#PBF implements a constant-frequency current-mode control architecture optimized for ultra-low DCR inductor sensing (down to 0.32mΩ), using dedicated ISENSE± inputs with ±1µA bias current and 10-bit current readback resolution. Its three-state PWM outputs (PWM0/PWM1) replace gate drivers, enabling direct connection to DrMOS devices while supporting phase synchronization via SHARE_CLK and external SYNC input.
Digital power management is realized through a PMBus-compliant interface with full telemetry (VIN, IIN, VOUT, IOUT, die and remote temperature), fault logging with ECC-protected internal EEPROM, and configurable protection thresholds-including programmable OV/UV response times (100µs), ±1.5% voltage supervisor accuracy, and independent FAULT0/FAULT1 open-drain outputs with 3µs digital filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-range industrial and automotive supply rails without external pre-regulation. |
| Output Voltage Range | 0.5V to 5.5V - selectable per channel via digital command or resistor configuration; enables DDR memory, ASIC, and FPGA core supplies. |
| Output Accuracy | ±0.5% over –40°C to +125°C - ensures stable regulation under thermal stress in high-reliability systems. |
| Current Sensing | Sub-milliohm DCR sensing down to 0.32mΩ - eliminates need for lossy sense resistors and improves efficiency at high currents. |
| PMBus Interface | I²C-compatible up to 400kHz - enables real-time telemetry, sequencing, margining, and fault logging via LTpowerPlay GUI. |
| Package | 48-lead 5mm × 6mm GQFN (RHE) with exposed SGND pad - provides low thermal resistance (θJC = 3.7°C/W) for high-power density layouts. |
| Automotive Qualification | AEC-Q100 Grade 1 (–40°C to +125°C) - validated for under-hood and ADAS power applications requiring long-term reliability. |
Pinout & Package
48-lead plastic GQFN package (5mm × 6mm, RHE variant) with exposed SGND pad (Pin 49) requiring PCB soldering for thermal and electrical integrity. Pin functions align with LTC3884-1 variant per Rev. G datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD0 / PGOOD1 | Open-drain power-good indicator | Asserts low when respective output is within ±10% of programmed VOUT; 60µs digital filtering prevents false triggering. |
| FAULT0 / FAULT1 | Open-drain fault flag | Active-low per-channel fault reporting (OV/UV/OC/OT); 3µs digital filtering ensures noise immunity. |
| PWM0 / PWM1 | Three-state PWM output | Drives DrMOS or power blocks directly; supports high-side/low-side/Hi-Z states for precise timing control. |
| VSENSE0+/VSENSE0− VSENSE1+/VSENSE1− | Differential output voltage sense | High-impedance (50kΩ) inputs enable Kelvin sensing; supports 0.5V–5.5V range with ±1.5% threshold accuracy. |
| ISENSE0+/ISENSE0− ISENSE1+/ISENSE1− | Differential current sense | Optimized for sub-milliohm DCR; ±1µA input bias minimizes error in low-voltage sense signals. |
| TSNS0 / TSNS1 | Remote temperature sense input | Accepts diode-connected NPN/PNP or thermistor; supports ±10°C total unadjusted error with MFR_PWM_MODE_[5] configuration. |
| SHARE_CLK | Phase-sharing clock output | Generates synchronized clock for multi-phase operation; enables accurate current sharing across up to six phases. |
| RUN0 / RUN1 | Enable input with 10µs filtering | Starts/stops respective channel independently; supports time- or voltage-based sequencing with programmable delays. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally programmable loop compensation | Adjustable gm (3–5.76 mmho) and RTH (0–62 kΩ) via PMBus or EEPROM - eliminates manual compensation component changes during design iteration. |
| Integrated input current sense amplifier | Configurable gain (2/4/8) with 10-bit readback and ±2% total unadjusted error - enables accurate input power monitoring and protection. |
| Internal EEPROM with ECC and fault logging | 10,000 write cycles, 10-year data retention at TJ < 125°C - stores configuration, fault history, and telemetry without external nonvolatile memory. |
| Accurate PolyPhase® current sharing | Supports up to 6 phases with SHARE_CLK synchronization - achieves <5% current imbalance across phases under transient load steps. |
| Programmable soft-start/stop and sequencing | Independent ramp rates and delay timers per channel - enables safe power-up/down of multi-rail systems like FPGAs and processors. |
Applications
| Telecom Point-of-Load Supply | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Powering high-current FPGA and DSP cores in 48V telecom rectifier systems with strict efficiency and telemetry requirements. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent 1.8V/30A and 1.0V/30A rails with synchronized phase interleaving and real-time current/voltage telemetry. Use Value: Sub-milliohm DCR sensing reduces conduction losses by >1.2W per rail vs. 5mΩ shunt; PMBus telemetry enables remote health monitoring and predictive maintenance. | Use Scenario: Providing tightly regulated, sequenced power to radar processor, image sensor, and CAN transceiver in autonomous driving ECUs. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual controller delivering 1.2V/25A (core) and 3.3V/15A (I/O) with voltage-based sequencing and fault-isolated shutdown. Use Value: ±0.5% output accuracy maintains functional safety compliance; independent FAULT0/FAULT1 pins enable ASIL-B fault containment per ISO 26262. |
| Industrial PLC CPU Module | Enterprise SSD Power Management |
Use Scenario: Regulating multiple voltage rails (1.1V, 1.8V, 3.3V) on modular PLC backplanes with variable ambient temperature and long service life. IC Role / Device Role / Timing Role: Digital power manager executing voltage margining, temperature-compensated current limits, and EEPROM-stored startup profiles across all rails. Use Value: Internal EEPROM retains calibrated settings after power loss; ±1°C internal temperature sensing enables dynamic derating for extended lifetime at 125°C junction. | Use Scenario: Delivering fast-transient, low-noise power to NVMe SSD controllers and NAND flash arrays in datacenter storage servers. IC Role / Device Role / Timing Role: Dual-phase controller operating at 350kHz with programmable slew rate control, digital soft-start, and peak current limiting per channel. Use Value: Three-state PWM outputs reduce switching node ringing vs. gate drivers; 90ms telemetry update rate captures burst-write current spikes for thermal modeling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUH#PBF | Single-output controller; lacks second channel and three-state PWM; uses integrated gate drivers instead of PWM outputs. | Suitable only for single-rail systems; cannot support independent sequencing or fault isolation between two rails. | Select when cost-sensitive single-output digital control suffices and DrMOS interface is not required. |
| MP8770GQ-Z | No PMBus interface; analog-only configuration; no EEPROM or telemetry; fixed 500kHz switching frequency. | Targeted at cost-optimized, non-telemetric applications where digital supervision and field reconfiguration are unnecessary. | Choose for high-volume consumer or industrial designs where digital power management adds no value. |
Compared with LTC3883IUH#PBF and MP8770GQ-Z, the LTC3884ERHE-1#PBF uniquely delivers dual-rail digital control with DrMOS compatibility, AEC-Q100 qualification, and full PMBus telemetry-making it the only option for automotive or telecom systems requiring fault-isolated, field-upgradable, multi-phase power delivery.
Availability
LTC3884ERHE-1#PBF is available at Aetrix Electronics and suitable for telecom point-of-load supplies, automotive ADAS domain controllers, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3884ERHE-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, industrial automation, communications, and automotive markets.
The LTC3884/LTC3884-1 product line was designed specifically for digitally managed, high-efficiency, multi-phase DC/DC conversion in space-constrained, thermally demanding environments such as base station radios and autonomous vehicle ECUs.
FAQ
What is the primary function of the LTC3884ERHE-1#PBF in a power system?
The LTC3884ERHE-1#PBF serves as a dual-output PolyPhase synchronous step-down DC/DC controller with integrated PMBus digital power management. It regulates two independent output voltages (0.5V–5.5V), performs sub-milliohm DCR current sensing, and drives DrMOS power stages via three-state PWM outputs - making it ideal for high-density, telemetry-enabled power delivery in telecom and automotive systems. The LTC3884ERHE-1#PBF replaces traditional analog controllers with digital configurability, fault logging, and real-time telemetry.
How does the LTC3884ERHE-1#PBF differ from the standard LTC3884 version?
The LTC3884ERHE-1#PBF implements the LTC3884-1 variant, which features three-state PWM outputs (PWM0/PWM1) instead of integrated N-channel gate drivers found in the LTC3884. This allows direct interfacing with DrMOS devices or external power blocks, offering greater flexibility in high-current, high-efficiency designs. The LTC3884ERHE-1#PBF also omits BOOST/TG/SW pins present in the LTC3884, confirming its role as a driverless controller optimized for advanced power stages.
Does the LTC3884ERHE-1#PBF support AEC-Q100 qualification, and for which grade?
Yes, the LTC3884ERHE-1#PBF is AEC-Q100 qualified for Grade 1 operation (–40°C to +125°C junction temperature), as confirmed in the Order Information table of the Rev. G datasheet. This qualification validates its suitability for automotive applications including ADAS domain controllers, infotainment power supplies, and body control modules where long-term reliability under thermal stress is mandatory. The LTC3884ERHE-1#PBF meets stringent automotive reliability and failure-rate requirements without requiring additional qualification testing.
What telemetry data can be read back from the LTC3884ERHE-1#PBF via PMBus?
The LTC3884ERHE-1#PBF supports full telemetry readback via PMBus, including input voltage (VIN), input current (IIN), output voltage (VOUT), output current (IOUT), internal die temperature, and remote temperature (via TSNS0/TSNS1). All parameters feature calibrated resolution: 16-bit VOUT (244µV LSB), 10-bit IOUT (15.63–125µV LSB depending on range), and 0.25°C temperature resolution. Telemetry updates occur every 90ms, enabling real-time system health monitoring and thermal profiling in applications like enterprise SSDs and 5G baseband units.
Can the LTC3884ERHE-1#PBF be configured without a microcontroller or PMBus host?
Yes, the LTC3884ERHE-1#PBF supports resistor-based configuration for critical parameters including output voltage (VOUT0_CFG/VOUT1_CFG), switching frequency (FREQ_CFG), phase offset (PHASE_CFG), and device address (ASEL0/ASEL1). These pins accept logic-high/low or resistor-divider inputs to set defaults at power-up, allowing standalone operation. However, full digital functionality - including loop compensation tuning, fault logging, sequencing, and telemetry - requires PMBus communication via LTpowerPlay or a system host. The LTC3884ERHE-1#PBF retains all resistor-configured settings even after EEPROM programming.
LTC3884ERHE-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)
LTC3884ERHE-1#PBF FAQ
1.How can I place an order for LTC3884ERHE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884ERHE-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 LTC3884ERHE-1#PBF reliable?
The price and inventory of LTC3884ERHE-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 LTC3884ERHE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3884ERHE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884ERHE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884ERHE-1#PBF?
LTC3884ERHE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884ERHE-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 LTC3884ERHE-1#PBF?
For technical support, including LTC3884ERHE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884ERHE-1#PBF requirements.
6.How does Aetrix verify that LTC3884ERHE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3884ERHE-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 LTC3884ERHE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3884ERHE-1#PBF?
All LTC3884ERHE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884ERHE-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 LTC3884ERHE-1#PBF part is unused and in its original packaging.
Return procedure for LTC3884ERHE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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