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Analog Devices Inc. LTC3889EUKG#TRPBF
- Part No.:
- LTC3889EUKG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 52-WFQFN, 46 Leads, Exposed Pad
- Datasheet:
-
LTC3889EUKG#TRPBF.pdf
- Description:
- IC REG BUCK PROG DL 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,561
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Product details
Overview
LTC3889EUKG#TRPBF from Analog Devices is a dual-output, 5V–60V input, PMBus-compliant synchronous step-down controller with integrated 16-bit ADC, 12-bit DAC, EEPROM with ECC, and independent power-good/FAULT signaling per channel. It supports up to 6-phase PolyPhase® current sharing (85kHz–500kHz), programmable loop compensation, and digital soft-start/sequencing - deployed in telecom rectifier modules and high-density server point-of-load systems.
For engineers reviewing the LTC3889EUKG#TRPBF datasheet, LTC3889EUKG#TRPBF pinout, LTC3889EUKG#TRPBF application, or LTC3889EUKG#TRPBF equivalent, key selection criteria include its dual-channel ±0.5% VOUT accuracy over temperature, 52-lead QFN package with EXTVCC support up to 14V, I²C/PMBus telemetry for VIN/IIN/VOUT/IOUT/temperature/faults, and compatibility with LTpowerPlay™ GUI-based configuration.
Technical Context
The LTC3889EUKG#TRPBF implements constant-frequency current-mode control with analog PWM loops per output, each featuring independently programmable error amplifier transconductance (1.00–5.76 mmho, 5-bit RITHR resolution) and digital servo mode for closed-loop voltage regulation. Its internal 16-bit ADC digitizes six analog inputs (VIN, VOUT0/1, IOUT0/1, die temperature), while the 12-bit DAC sets reference voltages and compensates for line/load drift.
Digital system management includes on-chip EEPROM (10-year retention, 10k write cycles) storing configuration, fault logs with timestamped events, and CRC-protected PMBus command execution. Phase synchronization via SHARE_CLK and external SYNC enables precise interleaving across multiple controllers for ripple reduction and thermal balancing in multi-rail power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports wide-range industrial and telecom DC inputs without external pre-regulation |
| Output Voltage Range | VOUT0: 1V–40V; VOUT1: 1V–40V - independent programmable rails for mixed-voltage SoC/FPGA domains |
| Output Accuracy | ±0.5% over temperature - enables tight margining and compliance with ASIC core voltage tolerances |
| Switching Frequency | 85kHz to 500kHz - adjustable via resistor or PMBus; supports high-efficiency operation at 150kHz typical |
| PMBus Interface | I²C-compatible, 10–400kHz - enables real-time telemetry readback and dynamic reconfiguration in live systems |
| ADC/DAC Resolution | 16-bit ADC (VIN/VOUT/IOUT/temp), 12-bit DAC - provides sub-mV and sub-mA measurement fidelity for closed-loop control |
| Package | 52-lead QFN (7mm × 8mm) with exposed GND pad - optimized for thermal dissipation in high-current POL applications |
Pinout & Package
52-lead plastic QFN (7mm × 8mm), exposed thermal pad (Pin 53 = GND), RoHS-compliant, –40°C to +125°C operating junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 5V–60V; powers internal circuitry and gate drivers when EXTVCC is absent |
| EXTVCC | External bias supply input | Supports 7V–14V; improves efficiency and reduces die temperature by powering DRVCC independently |
| TG0/TG1 | Top gate drivers | High-side N-MOSFET gate drive outputs with 30ns rise/fall time (3.3nF load) |
| BG0/BG1 | Bottom gate drivers | Low-side N-MOSFET gate drive outputs with 20ns rise/fall time (3.3nF load) |
| VSENSE0+/VSENSE0– VSENSE1+/VSENSE1– |
Differential output voltage sense | Enables Kelvin sensing for ±0.5% regulation accuracy; rejects PCB trace IR drop |
| ISENSE0+/ISENSE0– ISENSE1+/ISENSE1– |
Differential output current sense | Supports low-value shunt or DCR sensing; 16-bit ADC resolves down to 15.26µV LSB |
| PGOOD0/PGOOD1 | Power-good status indicators | Open-drain outputs asserting after soft-start completion and within ±5% VOUT window |
| FAULT0/FAULT1 | Per-channel fault reporting | Open-drain outputs latching on OV/UV/OC/OT events; configurable via PMBus FAULT_MASK |
| SDA/SCL | PMBus serial interface | I²C-compatible bidirectional data/clock lines; support 10–400kHz operation with built-in filtering |
| SHARE_CLK | PolyPhase® clock output | Drives external LTC3889 or compatible controllers to synchronize switching phases and reduce input ripple |
Key Features
| Feature | Design Value |
|---|---|
| Integrated EEPROM with ECC | Stores user configuration, fault logs, and calibration data with error correction; 10-year data retention at ≤125°C junction |
| Dual independent power-good/FAULT pins | Enables per-rail sequencing validation and isolated fault isolation in multi-output systems without external logic |
| Programmable current-mode loop compensation | 5-bit RITHR register adjusts error amplifier gm (1.00–5.76 mmho) to optimize transient response for specific output filter L/C |
| Telemetry read-back via PMBus | Real-time access to VIN, IIN, VOUT0/1, IOUT0/1, die/external temperature, and fault status without additional sensors |
| Discontinuous or continuous conduction mode | Selectable via PMBus MODE command - pulse-skipping improves light-load efficiency; CCM ensures predictable ripple |
Applications
| Telecom Rectifier Modules | Server Point-of-Load Supplies |
|---|---|
|
Use Scenario: 48V input conversion to 12V/24V intermediate bus in distributed power architecture. IC Role / Device Role / Timing Role: Dual-output controller managing parallel buck stages with phase interleaving via SHARE_CLK. Use Value: 96% peak efficiency at 20A load (VOUT=12V), ±0.5% output accuracy maintains compliance with ITU-T LPS standards. |
Use Scenario: High-density 24V-to-0.8V/1.8V conversion for CPU/GPU VRMs in AI accelerators. IC Role / Device Role / Timing Role: Master controller coordinating up to 6 phases across multiple LTC3889 devices for >100A total output. Use Value: PolyPhase® current sharing error <±1% enables thermal balancing and eliminates need for external current-sharing ICs. |
| Industrial PLC Power Management | Storage System Power Sequencing |
|
Use Scenario: Multi-rail power for FPGA, I/O, and communication interfaces in ruggedized automation controllers. IC Role / Device Role / Timing Role: Digital power manager executing time-based and event-triggered sequencing of VCCINT/VCCAUX/VCCIO rails. Use Value: Programmable soft-start ramp rate and inter-rail delay prevents inrush current overload during cold start. |
Use Scenario: Power-up coordination of NVMe SSD controller, DRAM buffer, and flash memory in enterprise storage arrays. IC Role / Device Role / Timing Role: PMBus-configured sequencer enforcing strict voltage ramp order and timing windows per JEDEC spec. Use Value: Fault logging captures timestamped UV/OV/OC events for root-cause analysis during field failure investigations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3886IUKG#TRPBF | Lower VOUT range (0.5V–13.8V); supports I²C-compatible SMBus only; no internal EEPROM | Targeted at lower-voltage CPU/GPU VRMs; lacks fault logging and nonvolatile configuration storage | Choose when cost-sensitive designs require basic digital control without long-term telemetry history or autonomous restart capability |
| LTC3887IUKG#TRPBF | Single-output controller; identical 5V–60V input, same PMBus feature set and EEPROM, but no second channel or SHARE_CLK | Suitable for single-rail systems where dual output is unnecessary; occupies less PCB area | Select for simpler power trees requiring only one digitally managed rail with full telemetry and fault resilience |
Compared with LTC3886 and LTC3887, the LTC3889EUKG#TRPBF uniquely delivers dual independent outputs with synchronized PolyPhase® operation, on-chip fault logging, and wider 1V–40V VOUT programmability - making it optimal for complex multi-rail infrastructure where reliability, diagnostics, and thermal management are critical.
Availability
LTC3889EUKG#TRPBF is available at Aetrix Electronics and suitable for telecom rectifier modules, server point-of-load supplies, and industrial PLC power management requiring stable component supply and long-term lifecycle assurance.
Supply support for LTC3889EUKG#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 precision instrumentation, communications, and power management markets.
The LTC3889 belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for high-reliability, telemetry-rich, multi-rail DC/DC conversion in datacenter, telecom, and industrial infrastructure.
FAQ
What is the maximum input voltage supported by the LTC3889EUKG#TRPBF?
The LTC3889EUKG#TRPBF supports an absolute maximum input voltage of 65V on the VIN pin, with guaranteed operation across 5V to 60V. This wide range accommodates legacy 48V telecom systems, 36V industrial buses, and emerging 54V datacenter architectures - all while maintaining ±0.5% output regulation accuracy over temperature.
Does the LTC3889EUKG#TRPBF support both continuous and discontinuous conduction modes?
Yes, the LTC3889EUKG#TRPBF can be configured for either continuous conduction mode (CCM) or discontinuous conduction mode (DCM/pulse-skipping) via the MODE command in the PMBus interface. CCM ensures predictable ripple and EMI behavior under full load; DCM improves light-load efficiency by skipping pulses when inductor current reaches zero.
How does the LTC3889EUKG#TRPBF handle fault conditions such as overvoltage or overcurrent?
The LTC3889EUKG#TRPBF features dedicated FAULT0 and FAULT1 open-drain outputs that assert on per-channel OV/UV/OC/OT events. Fault responses are fully programmable via PMBus - including latch-off, retry, or auto-restart - and all events are timestamped and stored in on-chip EEPROM with ECC protection for post-failure diagnostics.
Can the LTC3889EUKG#TRPBF be used without an external microcontroller?
Yes, the LTC3889EUKG#TRPBF operates autonomously using configuration stored in its internal EEPROM. All settings - including VOUT, frequency, soft-start, sequencing, and fault thresholds - persist across power cycles. External MCU interaction is optional and used only for dynamic reconfiguration or telemetry readback via PMBus.
What software tools are supported for configuring the LTC3889EUKG#TRPBF?
The LTC3889EUKG#TRPBF is fully supported by Analog Devices' LTpowerPlay™ GUI software, which enables real-time parameter adjustment, telemetry monitoring, fault logging review, and EEPROM configuration save/restore. The tool connects via USB-to-I²C adapter and supports scripting for automated test and production calibration.
LTC3889EUKG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN, 46 Leads, Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 40V
- Current - Output:
- -
- Frequency - Switching:
- 85kHz ~ 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-QFN (7x8)
LTC3889EUKG#TRPBF FAQ
1.How can I place an order for LTC3889EUKG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3889EUKG#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 LTC3889EUKG#TRPBF reliable?
The price and inventory of LTC3889EUKG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3889EUKG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3889EUKG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3889EUKG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3889EUKG#TRPBF?
LTC3889EUKG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3889EUKG#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 LTC3889EUKG#TRPBF?
For technical support, including LTC3889EUKG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3889EUKG#TRPBF requirements.
6.How does Aetrix verify that LTC3889EUKG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3889EUKG#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 LTC3889EUKG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3889EUKG#TRPBF?
All LTC3889EUKG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3889EUKG#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 LTC3889EUKG#TRPBF part is unused and in its original packaging.
Return procedure for LTC3889EUKG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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