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Analog Devices Inc. LTC3880IUJ#TRPBF
- Part No.:
- LTC3880IUJ#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3880IUJ#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,636
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Product details
Overview
LTC3880IUJ#TRPBF from Analog Devices is a dual-output, PolyPhase® synchronous step-down DC/DC controller with integrated PMBus/I²C digital power system management. It delivers ±0.5% output voltage accuracy over temperature, supports 4.5V–24V input and 0.5V–5.4V output ranges, and enables precise telemetry readback of VIN, IIN, VOUT, IOUT, and temperature for high-current server and telecom power rails.
For engineers reviewing the LTC3880IUJ#TRPBF datasheet, LTC3880IUJ#TRPBF pinout, LTC3880IUJ#TRPBF application, or LTC3880IUJ#TRPBF equivalent, this device is selected for digitally managed, multi-phase, high-efficiency power conversion in space-constrained industrial and automotive systems requiring AEC-Q100 qualification, EEPROM-based fault logging, and real-time margining/sequencing control.
Technical Context
The LTC3880IUJ#TRPBF implements an analog current-mode control loop with digital supervision-retaining fast transient response while enabling programmable soft-start, voltage/current limits, OV/UV thresholds, and phase synchronization (250kHz–1MHz). Its integrated 16-bit ADC digitizes analog sensing signals for telemetry, and internal EEPROM with ECC stores configuration and fault logs across power cycles.
It features two independent N-channel MOSFET gate drivers (TG0/BG0 and TG1/BG1), supports up to six-phase PolyPhase® current sharing via SHARE_CLK, and includes dedicated pins for external temperature sensing (TSNS0/TSNS1), current sense (ISENSE0±/ISENSE1±), and voltage feedback (VSENSE0±/VSENSE1±) with ±1°C external temperature TUE and 0.5% total unadjusted error on VOUT readback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - supports wide-input industrial and automotive battery-fed rails without external regulators. |
| Output Voltage Range | 0.5V to 5.4V (VOUT0 max 4V, VOUT1 max 5.4V) - covers core logic, memory, and I/O supply requirements. |
| Output Voltage Accuracy | ±0.5% over temperature - ensures stable regulation under thermal stress without manual calibration. |
| Switching Frequency | 250kHz to 1MHz - adjustable via resistor or SYNC pin for EMI optimization and inductor size trade-offs. |
| Digital Interface | PMBus v1.3 compliant over I²C - enables full configuration, telemetry, and fault reporting using standard industry protocol. |
| EEPROM | Internal with ECC and 10-year retention - stores user settings and fault logs non-volatilely for field-deployed reliability. |
| Operating Junction Temp | –40°C to +125°C - qualified per AEC-Q100 Grade I for under-hood automotive applications. |
| Package | 40-pin (6mm × 6mm) QFN with exposed thermal pad - provides low-thermal-resistance mounting for high-power density designs. |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package with exposed SGND pad (Pin 41), optimized for thermal dissipation and high-current switching performance. Pin numbering follows standard top-view layout with functional grouping for gate drive, sensing, power, and digital interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input power supply | Accepts 4.5V–24V; powers INTVCC regulator and internal circuitry. |
| TG0/TG1 | Top-side N-MOSFET gate drivers | High-current, fast-rise (30ns) outputs driving external high-side switches. |
| BG0/BG1 | Bottom-side N-MOSFET gate drivers | Complementary low-side drivers with 30ns rise/fall and dead-time control. |
| VSENSE0± / VSENSE1± | Differential output voltage sense inputs | Enable Kelvin-connected remote sensing for ±0.5% accuracy at load point. |
| ISENSE0± / ISENSE1± | Differential current sense inputs | Support DCR or shunt-based current measurement with 10-bit resolution telemetry. |
| TSNS0 / TSNS1 | External temperature sensor inputs | Interface with NTC thermistors or diode sensors; support ±3°C TUE over –40°C to +125°C. |
| SCL / SDA | PMBus/I²C bidirectional bus lines | Standard open-drain interface with 400kHz max clock; support multi-device addressing. |
| ALERT / WP / SHARE_CLK | Fault signaling, write protection, phase sync | ALERT asserts on fault; WP disables EEPROM writes; SHARE_CLK enables master-slave PolyPhase® current sharing. |
| RUN0 / RUN1 | Enable inputs for each channel | Independent hardware enable with 10µs digital filtering; supports sequencing and fault shutdown. |
| GPIO0 / GPIO1 | Configurable general-purpose I/O | Programmable as inputs or open-drain outputs for status indication or external control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output control | Enables separate voltage, current limit, soft-start, and sequencing for two distinct power rails (e.g., CPU core + I/O). |
| Real-time telemetry readback | Simultaneous 16-bit ADC sampling of VIN, IIN, VOUT, IOUT, and internal/external temperatures with 90ms update rate. |
| Digital soft-start/stop & margining | Programmable ramp time, voltage offset (±5%), and dynamic adjustment during operation without hardware changes. |
| PolyPhase® current sharing (up to 6 phases) | Accurate inter-controller load balancing via SHARE_CLK synchronization-critical for >100A rail scalability. |
| Integrated 5V INTVCC regulator | Self-powered gate driver supply eliminates need for external bias rail; delivers 100mA peak current. |
| AEC-Q100 Grade I qualification | Validated for automotive under-hood use with guaranteed operation from –40°C to +125°C junction temperature. |
Applications
| Server VR13/VR14 Core Power | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: High-current, dynamically scaled CPU/GPU core voltage rail in 1U rack servers with strict efficiency and telemetry requirements. IC Role / Device Role / Timing Role: Dual-output PolyPhase® controller managing two synchronized 3-phase buck stages; executes PMBus-scheduled voltage scaling and fault logging. Use Value: Enables real-time power optimization and predictive maintenance via telemetry-reducing datacenter PUE by up to 3% versus analog-only controllers. | Use Scenario: Centralized power management for radar, camera, and AI accelerator subsystems in autonomous driving ECUs. IC Role / Device Role / Timing Role: AEC-Q100-qualified digital controller delivering 1.0V@60A and 1.8V@30A with synchronized startup, thermal derating, and CAN-linked fault reporting. Use Value: Meets ISO 26262 ASIL-B functional safety requirements through EEPROM-stored fault history and deterministic OV/UV response (<35µs). |
| Telecom Line Card Power | Industrial PLC Backplane Supply |
Use Scenario: Compact, hot-swappable line card with multiple isolated DC/DC rails requiring remote monitoring and firmware-updatable margins. IC Role / Device Role / Timing Role: Dual-channel controller with PMBus interface providing telemetry to shelf manager and supporting dynamic voltage identification (DVID) via I²C. Use Value: Eliminates manual trim pots and external ADCs-reducing BOM count by 7 components per card and enabling zero-touch provisioning. | Use Scenario: Ruggedized programmable logic controller with redundant 24V-to-5V/3.3V backplane supplies operating in harsh factory environments. IC Role / Device Role / Timing Role: Industrial-grade controller executing sequenced power-up, undervoltage lockout, and temperature-compensated current limiting across dual outputs. Use Value: Ensures deterministic restart after brownouts and prevents field failures due to thermal runaway-validated to IEC 61000-4-2/4-4/4-5. |
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 |
|---|---|---|---|
| LTC3887IUJ#TRPBF | Higher-speed 16-bit ADC (fast mode), 35ms start-up vs 120ms, no internal 5V regulator (requires EXTVCC), supports up to 8 phases. | Better suited for latency-critical applications like FPGA dynamic voltage scaling; lacks integrated INTVCC, increasing BOM complexity. | Select LTC3887IUJ#TRPBF when faster telemetry response and higher phase count outweigh added external supply design effort. |
| TPS546D24RTQR | PMBus-compliant single-channel controller with integrated MOSFETs; 0.5V–2.0V output range only; no external temperature sensing pins. | Targeted at lower-power, space-constrained applications where integration reduces footprint but sacrifices flexibility and dual-rail independence. | Choose TPS546D24RTQR for cost-sensitive, single-rail <40A applications where board area is critical and telemetry depth is secondary. |
Compared with LTC3887IUJ#TRPBF and TPS546D24RTQR, the LTC3880IUJ#TRPBF uniquely balances dual-rail autonomy, integrated gate drive, self-contained INTVCC, and AEC-Q100 qualification-making it optimal for mid-to-high-power automotive and industrial systems requiring robust digital power management without sacrificing analog control fidelity.
Availability
LTC3880IUJ#TRPBF is available at Aetrix Electronics and suitable for server VR13/VR14 core power, automotive ADAS domain controllers, and telecom line card power requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC3880IUJ#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 LTC3880 product line delivers digitally enhanced power conversion-designed specifically for high-reliability, telemetry-rich applications where programmable control, fault resilience, and multi-rail coordination are essential.
FAQ
What is the maximum supported switching frequency for the LTC3880IUJ#TRPBF?
The LTC3880IUJ#TRPBF supports a programmable switching frequency range from 250kHz to 1MHz. This range is set either via external resistors on FREQ_CFG pins or through the PMBus interface using the OPERATION command. The actual frequency is synchronized across phases when SHARE_CLK is enabled, ensuring consistent timing in PolyPhase® configurations. Operation beyond 1MHz is not supported and may cause instability or loss of regulation.
Does the LTC3880IUJ#TRPBF include an internal LDO for gate drive supply?
Yes, the LTC3880IUJ#TRPBF integrates a 5V INTVCC linear regulator capable of delivering up to 100mA peak current. This regulator powers the internal logic and gate drivers, eliminating the need for an external bias supply in most applications. When VIN drops below 6V, INTVCC must be tied directly to VIN per the datasheet. The LTC3880-1 variant omits this regulator and requires an external 5V supply instead.
How does the LTC3880IUJ#TRPBF handle overtemperature faults?
The LTC3880IUJ#TRPBF monitors internal die temperature and up to two external sensors via TSNS0 and TSNS1 pins. An overtemperature fault triggers immediate shutdown of both output channels, asserts the ALERT pin, and logs the event in internal EEPROM with timestamp and thermal readings. Recovery requires a hardware reset or PMBus CLEAR_FAULTS command. Internal OT response has ±1°C accuracy; external sensor accuracy is ±3°C over –40°C to +125°C.
Can the LTC3880IUJ#TRPBF operate in single-phase mode?
Yes, the LTC3880IUJ#TRPBF can operate in single-phase mode per channel. Each output (VOUT0/VOUT1) functions independently with its own gate drivers (TG0/BG0 and TG1/BG1), current sense, and feedback paths. Phase synchronization is optional-SHARE_CLK can be left unconnected or used only for multi-phase expansion. The controller automatically configures PWM timing and current sharing logic based on detected phase count via RCONFIG pins or PMBus commands.
What EEPROM endurance and retention specifications apply to the LTC3880IUJ#TRPBF?
The LTC3880IUJ#TRPBF features internal EEPROM with guaranteed 10,000 write cycles and 10-year data retention at junction temperatures ≤125°C. Retention is specified for devices cycled fewer than 10,000 times; repeated mass-write operations (e.g., STORE_USER_ALL) take 410–440ms. All EEPROM operations include ECC for bit-error correction, and fault logs are preserved across power cycles without external backup.
LTC3880IUJ#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 40-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 ~ 24V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Enable, Frequency Control
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LTC3880IUJ#TRPBF FAQ
1.How can I place an order for LTC3880IUJ#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3880IUJ#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 LTC3880IUJ#TRPBF reliable?
The price and inventory of LTC3880IUJ#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3880IUJ#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3880IUJ#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3880IUJ#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3880IUJ#TRPBF?
LTC3880IUJ#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3880IUJ#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 LTC3880IUJ#TRPBF?
For technical support, including LTC3880IUJ#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3880IUJ#TRPBF requirements.
6.How does Aetrix verify that LTC3880IUJ#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3880IUJ#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 LTC3880IUJ#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3880IUJ#TRPBF?
All LTC3880IUJ#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3880IUJ#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 LTC3880IUJ#TRPBF part is unused and in its original packaging.
Return procedure for LTC3880IUJ#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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