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Analog Devices Inc. LTC3884ERHE#TRPBF
- Part No.:
- LTC3884ERHE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884ERHE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,651
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Product details
Overview
LTC3884ERHE#TRPBF 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 digital power system management. 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 interleaving for high-current point-of-load applications in telecom and industrial systems.
For engineers reviewing the LTC3884ERHE#TRPBF datasheet, LTC3884ERHE#TRPBF pinout, LTC3884ERHE#TRPBF application, or LTC3884ERHE#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping (48-lead 5mm × 6mm GQFN), real-world telemetry capabilities (VIN/IIN/VOUT/IOUT/temperature readback), and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The LTC3884ERHE#TRPBF implements a constant-frequency current-mode control architecture optimized for ultra-low-resistance inductor DCR sensing (down to 0.32mΩ), enabling precise sub-milliohm current measurement without external sense resistors. Its dual independent PWM channels support programmable phase offset (0°–300°), synchronized switching via SYNC pin, and master-slave PolyPhase operation across up to six phases.
Digital loop compensation is implemented via 12-bit programmable transconductance (gm = 1–5.76 mmho) and 5-bit RTH resistor selection (0–62 kΩ), allowing full on-the-fly tuning of Type II/III compensation without hardware changes. All configuration, telemetry, fault logging, and EEPROM-stored settings operate under PMBus v1.3 compliance with CRC protection, ECC-enabled internal NVM, and 10-year data retention at ≤125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial, telecom, and automotive supply rails without external regulators. |
| Output Voltage Range | 0.5V to 5.5V - configurable per channel via PMBus or resistor programming; low-DCR mode enables 0.5V–3.5V with enhanced current-sense precision. |
| VOUT Accuracy | ±0.5% over –40°C to +125°C - ensures stable voltage regulation across thermal extremes in embedded and automotive environments. |
| Current Sensing | Sub-milliohm DCR sensing (down to 0.32mΩ) - eliminates need for power-wasting shunt resistors while maintaining <±1.25% IOUT readback TUE. |
| Telemetry Resolution | 16-bit VOUT, 10-bit IOUT/IIN/T - enables high-fidelity real-time monitoring of power rail health and dynamic load behavior. |
| Switching Frequency | 200kHz to 1MHz - digitally programmable via PMBus or RCONFIG pins; supports frequency synchronization across multiple controllers. |
| Package | 48-lead 5mm × 6mm plastic GQFN (RHE) with exposed SGND pad - thermally optimized for high-power density PCB layouts. |
Pinout & Package
Package: 48-lead plastic GQFN (RHE), 5mm × 6mm body, exposed SGND pad (Pin 49), RoHS-compliant, rated for –40°C to +125°C operating junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD0 / PGOOD1 | Open-drain power-good indicator | Asserts low when corresponding VOUT is within ±5% of programmed setpoint; enables sequencing and system-level fault isolation. |
| FAULT0 / FAULT1 | Open-drain fault flag output | Active-low signal triggered by OV/UV/OC/OT events on respective channel; supports daisy-chained fault propagation. |
| ISENSE0+/–, ISENSE1+/– | Differential current sense inputs | Accepts millivolt-level DCR or shunt voltage drops; enables sub-milliohm sensing with 10-bit resolution and ±1.25% total unadjusted error. |
| VSENSE0+/–, VSENSE1+/– | Differential output voltage feedback | High-impedance (50kΩ) inputs for precision remote sensing; supports Kelvin connections to minimize PCB trace IR errors. |
| TG0/TG1, BG0/BG1 | Integrated gate drivers (LTC3884 variant) | Drive external N-channel high-side/low-side MOSFETs; TG RDS(ON) = 2.6Ω (pull-up), 1.5Ω (pull-down); tr/tf = 30ns @ 3300pF. |
| SYNC, SHARE_CLK | Phase synchronization inputs | Enables precise multi-phase interleaving and clock alignment across multiple LTC3884 controllers for reduced input/output ripple. |
| SDA, SCL, ALERT, WP | PMBus 1.3 interface signals | Supports standard I²C timing (up to 400kHz), write-protection, alert broadcasting, and CRC-protected command execution. |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | 12-bit gm and 5-bit RTH programmability enable real-time Type II/III compensation tuning without component changes or rework. |
| Internal EEPROM with ECC | 10-year data retention at ≤125°C junction temperature; stores configuration, fault logs, and calibration data with error correction. |
| Integrated gate drivers | On-chip TG/BG drivers eliminate need for external driver ICs; reduce BOM count and layout complexity in dual-phase designs. |
| Sub-milliohm DCR sensing | Supports inductor DCR as low as 0.32mΩ with <±1.25% current measurement error - avoids power loss and board space used by shunt resistors. |
| PMBus telemetry readback | Real-time reporting of VIN, IIN, VOUT, IOUT, die temperature, and external thermistor readings with 16-bit VOUT and 10-bit current resolution. |
Applications
| Telecom Point-of-Load Regulation | Data Center VRM Control |
|---|---|
Use Scenario: Regulating 1.8V/30A and 1.0V/30A rails for FPGA and ASIC cores in 48V intermediate bus architectures. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent buck stages with synchronized 350kHz switching and 180° phase offset. Use Value: Achieves >92% peak efficiency at full load while enabling real-time telemetry for dynamic power capping and thermal derating. |
Use Scenario: Providing tightly regulated, sequenced 0.85V/60A and 1.2V/40A supplies to CPU/GPU voltage domains in server motherboards. IC Role / Device Role / Timing Role: Master controller in 6-phase configuration (3 phases per output), using SHARE_CLK to coordinate phase interleaving and current sharing. Use Value: Enables accurate PolyPhase current balancing (<±5% mismatch) and digital margining for production test without hardware modification. |
| Industrial PLC Power Management | Automotive ADAS Domain Controller |
Use Scenario: Delivering isolated 3.3V and 5.0V auxiliary rails from a 24V vehicle battery input in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-output controller with independent RUN0/RUN1 enables staggered startup and fault-isolated shutdown sequences. Use Value: ±0.5% VOUT accuracy and AEC-Q100 qualification ensure reliable operation across –40°C to +125°C ambient conditions. |
Use Scenario: Powering radar SoC and image signal processors in autonomous driving ECUs requiring strict voltage sequencing and fault logging. IC Role / Device Role / Timing Role: PMBus-managed controller storing fault history (OV/UV/OC/OT) in EEPROM for post-event diagnostics and ASIL-B compliance tracking. Use Value: Internal temperature sensing (±1°C TUE) and external thermistor monitoring (±3°C TUE) support real-time thermal safety enforcement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PolyPhase DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUH#TRPBF | Single-output controller; lacks second VOUT channel and independent FAULT/PGOOD per rail. | Suitable only for single-rail systems; cannot replace dual-output sequencing or independent telemetry per channel. | Select when only one regulated output is required and cost reduction outweighs loss of redundancy and channel independence. |
| MP2965GQ-PR | Monolithic dual-output buck controller with integrated MOSFETs; no PMBus telemetry or EEPROM; lower VIN max (24V vs 38V). | Targeted at cost-sensitive consumer electronics; lacks sub-milliohm DCR sensing and fault logging capability. | Choose for compact, low-BOM-count designs where digital management and automotive-grade reliability are not required. |
Compared with LTC3884ERHE#TRPBF, LTC3883IUH#TRPBF reduces channel count and telemetry depth but lowers system cost, while MP2965GQ-PR trades programmability and ruggedness for integration and footprint - making both viable only in non-dual-rail or non-telemetry-critical contexts.
Availability
LTC3884ERHE#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3884ERHE#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, 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 product line delivers digitally managed, high-efficiency PolyPhase DC/DC controllers for mission-critical power systems demanding precision regulation, real-time telemetry, and robust fault handling in harsh environments.
FAQ
What is the maximum supported switching frequency for the LTC3884ERHE#TRPBF?
The LTC3884ERHE#TRPBF supports a programmable switching frequency range of 200kHz to 1MHz. This is set either via the PMBus interface or through external RCONFIG resistors. The typical default is 350kHz, and frequency synchronization across multiple controllers is enabled via the SYNC pin with a PLL lock range of 200kHz to 1MHz.
Does the LTC3884ERHE#TRPBF include integrated MOSFET drivers?
Yes, the LTC3884ERHE#TRPBF includes integrated N-channel MOSFET gate drivers for both high-side (TG0/TG1) and low-side (BG0/BG1) FETs. Each driver features pull-up/pull-down RDS(ON) of 2.6Ω/1.5Ω (TG) and 2.4Ω/1.1Ω (BG), with 30ns rise/fall times into 3300pF loads - eliminating the need for external drivers in most medium-power applications.
How does the LTC3884ERHE#TRPBF achieve sub-milliohm current sensing?
The LTC3884ERHE#TRPBF achieves sub-milliohm current sensing using its dedicated ISENSE0± and ISENSE1± differential inputs, which interface directly with low-value inductor DCR or precision shunts. With programmable gain and offset calibration stored in EEPROM, it supports DCR as low as 0.32mΩ while maintaining ±1.25% total unadjusted current measurement error across temperature.
Is the LTC3884ERHE#TRPBF qualified for automotive applications?
Yes - the LTC3884ERHE#TRPBF is AEC-Q100 qualified for automotive applications. It operates over a –40°C to +125°C junction temperature range, includes internal temperature sensing with ±1°C TUE, and supports EEPROM fault logging for diagnostic traceability - meeting key requirements for ADAS and domain controller power systems.
What telemetry parameters can be read back from the LTC3884ERHE#TRPBF via PMBus?
Via its PMBus 1.3 interface, the LTC3884ERHE#TRPBF supports real-time readback of VIN, IIN, VOUT0/VOUT1, IOUT0/IOUT1, internal die temperature, and external thermistor temperature (TSNS0/TSNS1). Voltage measurements offer 16-bit resolution (244µV LSB), while current and temperature use 10-bit resolution with calibrated accuracy.
LTC3884ERHE#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)
LTC3884ERHE#TRPBF FAQ
1.How can I place an order for LTC3884ERHE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884ERHE#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 LTC3884ERHE#TRPBF reliable?
The price and inventory of LTC3884ERHE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884ERHE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3884ERHE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884ERHE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884ERHE#TRPBF?
LTC3884ERHE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884ERHE#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 LTC3884ERHE#TRPBF?
For technical support, including LTC3884ERHE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884ERHE#TRPBF requirements.
6.How does Aetrix verify that LTC3884ERHE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3884ERHE#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 LTC3884ERHE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3884ERHE#TRPBF?
All LTC3884ERHE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884ERHE#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 LTC3884ERHE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3884ERHE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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