LTC3882-1#PBF - Dual 8-Phase Digital Power Controller | Analog Devices
MPN: LTC3882-1#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
LTC3882-1#PBF Overview
A digital power controller is a specialized power management IC that combines analog switching regulator control with digital monitoring and control via a serial bus such as PMBus or I2C. It sits within the hierarchy of power management ICs, specifically under DC-DC converters and switching controllers. The LTC3882-1 integrates digital power system management, allowing real-time telemetry of voltage, current, and temperature, as well as configuration of output voltages, sequencing, and fault limits through the PMBus interface.
Key features include dual output channels, each capable of driving up to 8 phases for high-current applications, a wide input voltage range, and a PMBus-compliant interface for digital control and monitoring. The device supports constant frequency operation with leading-edge modulation, ensuring stable and efficient power conversion. It also includes programmable loop compensation, fault protection, and telemetry for comprehensive power management.
Technically, the LTC3882-1 employs a voltage mode control architecture with leading-edge modulation, which provides excellent transient response and simplifies loop compensation. The digital interface allows precise output voltage setting, margining, and sequencing, making it ideal for complex systems requiring dynamic voltage scaling. The device operates over a junction temperature range of -40°C to 125°C, with the -1E version guaranteed from 0°C to 85°C.
Typical applications include high-performance computing, networking equipment, telecommunications infrastructure, and industrial systems where multiple high-current rails need precise digital control. The LTC3882-1 is particularly suited for FPGA, ASIC, and processor power supplies that demand high efficiency and accurate voltage regulation.
When designing with the LTC3882-1, ensure proper decoupling and layout for the high-frequency switching signals. The PMBus interface requires careful attention to I2C addressing and bus timing. Additionally, the power stage components (MOSFETs, inductors, capacitors) must be selected to meet the transient and efficiency requirements of the application.
Drop-in alternatives for LTC3882-1#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC3882-1#PBF (same form factor and footprint) — differing in Package, Output Voltage Range, Control Architecture, Input Voltage Range, Output Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC3882EUJ-1#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3882-2
✅ Drop-In✓ In Stock
$11.25 / Unit
View Datasheet →LTC3882IUJ#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3882EUJ#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3882-1
✅ Drop-In✓ In Stock
$7.9 / Unit
View Datasheet →LTC3882-1#PBF Maximum Ratings & Electrical Characteristics
| Output Type | Dual, Step-Down |
| Number of Outputs | 2 |
| Maximum Phases per Output | 8 |
| Control Architecture | Voltage Mode, Leading-Edge Modulation |
| Serial Interface | PMBus (I2C) |
| Package | 40-QFN (6x6) |
| Operating Junction Temperature | -40°C to 125°C |
| Guaranteed Temperature Range (E Grade) | 0°C to 85°C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| PMBus Compliance | Yes |
| Digital Power System Management | Yes |
LTC3882-1#PBF Pin Configuration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | VOUT1 — Output voltage sense for channel 1 |
| Pin 3 | VOUT2 — Output voltage sense for channel 2 |
| Pin 4 | GND — Ground |
| Pin 5 | PWM1 — PWM output for channel 1 |
| Pin 6 | PWM2 — PWM output for channel 2 |
| Pin 7 | SDA — PMBus data line |
| Pin 8 | SCL — PMBus clock line |
| Pin 9 | ALERT — Alert output |
| Pin 10 | RUN — Enable/run control |
Typical Applications
LTC3882-1#PBF is suitable for 6 applications: High-Performance Computing, Networking Equipment, Telecommunications Infrastructure, Industrial Automation, Data Center Power, FPGA and ASIC Power Supplies.
High-Performance Computing
The LTC3882-1#PBF is ideal for powering CPUs, GPUs, and FPGAs in servers and data centers. Its dual outputs and up to 8 phases per output deliver high current with precise voltage regulation. The PMBus interface enables dynamic voltage scaling and telemetry, essential for energy-efficient computing. Its voltage mode control ensures stable operation under fast load transients, meeting the stringent requirements of modern processors.
Recommended
Networking Equipment
In routers, switches, and base stations, the LTC3882-1#PBF provides reliable power for ASICs and line cards. Its dual outputs can supply separate rails for core and I/O, while the PMBus interface allows remote monitoring and control. The leading-edge modulation architecture delivers excellent transient response, crucial for handling bursty network traffic. The 40-QFN package is compact, saving board space in dense networking designs.
Recommended
Telecommunications Infrastructure
The LTC3882-1#PBF is well-suited for telecom power supplies that require high efficiency and precise regulation. Its PMBus interface enables configuration of output voltages and fault limits, simplifying system integration. The device supports PolyPhase operation, allowing multiple controllers to drive a single high-current rail. This makes it ideal for powering base station transceivers and line cards where reliability and thermal performance are critical.
Recommended
Industrial Automation
In industrial control systems, the LTC3882-1#PBF provides robust power management for PLCs, motor drives, and robotics. Its wide operating temperature range (-40°C to 125°C) ensures reliable operation in harsh environments. The digital interface allows real-time monitoring of voltage, current, and temperature, enabling predictive maintenance. The voltage mode control architecture ensures stable operation under varying load conditions, making it suitable for demanding industrial applications.
Recommended
Data Center Power
The LTC3882-1#PBF is designed for data center power distribution, providing high-current, multi-phase regulation for servers and storage systems. Its PMBus interface enables efficient power management, including voltage margining and sequencing, which is critical for optimizing energy consumption. The device's leading-edge modulation provides fast transient response, ensuring stable operation during sudden load changes. Its compact 40-QFN package is ideal for space-constrained server boards.
Recommended
FPGA and ASIC Power Supplies
The LTC3882-1#PBF is an excellent choice for powering FPGAs and ASICs that require multiple low-voltage, high-current rails. Its dual outputs can supply core and I/O voltages, while the PMBus interface allows precise voltage setting and sequencing. The device supports up to 8 phases per output, enabling high current delivery with low ripple. Its voltage mode control ensures stable operation, making it ideal for high-performance digital logic.
Recommended
Recommended Products Summary
Engineering reference data for LTC3882-1#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3882EUJ-1#PBF | LTC3882-2 | LTC3882IUJ#PBF |
|---|---|---|---|---|
| Package | 40-QFN (6x6) | 40-QFN (6x6) | 40-QFN (6x6) | 40-QFN (6x6) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Master/Slave | Master | Master | Slave | Master |
| Temperature Grade | Standard (0°C to 85°C guaranteed) | Standard | Standard | Industrial (-40°C to 125°C) |
| Lead-Free | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) |
| PMBus Interface | Yes | Yes | Yes | Yes |
| Number of Outputs | 2 | 2 | 2 | 2 |
| Max Phases per Output | 8 | 8 | 8 | 8 |
Key Differentiators
- Master controller capability (vs LTC3882-2)
- Lead-free option (vs LTC3882-1)
- Standard part number availability (vs LTC3882EUJ-1#PBF)
Design Notes
For the LTC3882-1#PBF, ensure a solid ground plane and adequate decoupling on the VIN pins. Place high-frequency ceramic capacitors close to the IC to minimize noise. The 40-QFN package has an exposed pad that should be soldered to the ground plane for thermal and electrical performance.
The LTC3882-1#PBF can dissipate significant power in high-current applications. Use thermal vias under the exposed pad to improve heat transfer to the PCB. Ensure adequate airflow or heatsinking if operating at high ambient temperatures. The junction temperature must not exceed 125°C.
When using the PMBus interface, ensure proper pull-up resistors on SDA and SCL lines. Incorrect I2C addressing can cause communication failures. Also, verify that the input voltage and output voltage settings are within the device's specifications to avoid damage.
Compliance Information
The #PBF suffix indicates lead-free (RoHS compliant). Other compliance data not specified in the provided sources.
