LTC3882-2#PBF - Dual PolyPhase Step-Down Controller | Analog Devices
MPN: LTC3882-2#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 |
LTC3882-2#PBF Overview
A DC/DC switching controller is an integrated circuit that manages the switching of external power MOSFETs to convert an input voltage to a regulated output voltage. Unlike a monolithic regulator, a controller does not include the power switches, allowing for higher efficiency and scalability. The LTC3882-2 is part of the digital power management family, combining analog voltage mode control with digital configuration and monitoring via PMBus, enabling precise voltage and current control, fault management, and telemetry.
Key features include dual output channels, each capable of multi-phase operation (up to 8 phases when paralleling four devices), a PMBus-compliant I2C serial interface for configuration and monitoring, and support for input voltage, output voltage, current, temperature, and fault status readback. The device operates from a 4.5V to 24V input supply and provides an adjustable output voltage range of 0.5V to 5.5V. It includes integrated drivers for external N-channel MOSFETs, a precision reference, and comprehensive protection features such as overvoltage, undervoltage, and overcurrent protection.
The LTC3882-2 uses a constant frequency, leading-edge modulation, voltage mode architecture, which provides excellent transient response and output regulation. The device supports PolyPhase operation, allowing up to four LTC3882-2s to operate in parallel for 2-, 3-, 4-, 6-, or 8-phase configurations, reducing input and output ripple and enabling high-current applications. The PMBus interface allows real-time monitoring and configuration, and the LTpowerPlay software tool simplifies system setup and debugging.
Typical applications include high-current FPGA, ASIC, and processor power supplies, telecom and networking equipment, and industrial systems requiring precise voltage regulation and digital power management. The device is ideal for applications where efficiency, accuracy, and remote monitoring are critical.
When designing with the LTC3882-2, ensure proper layout of the power stage and decoupling capacitors, and use the PMBus interface for configuration and monitoring. The device requires external MOSFETs, inductors, and compensation components, and careful thermal management is essential for high-current operation.
Drop-in alternatives for LTC3882-2#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 LTC3882-2#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:
LTC3882-1#PBF
✅ Drop-In✓ In Stock
$8.1 / Unit
View Datasheet →LTC3882EUJ#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3882IUJ#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC3882-2
✅ Drop-In✓ In Stock
$11.25 / Unit
View Datasheet →LTC3882-1
✅ Drop-In✓ In Stock
$7.9 / Unit
View Datasheet →LTC3882-2#PBF Maximum Ratings & Electrical Characteristics
| Output Type | Dual, Adjustable |
| Output Voltage Range | 0.5 V to 5.5 V |
| Input Voltage Range | 4.5 V to 24 V |
| Switching Frequency | Up to 2.5 MHz |
| Number of Outputs | 2 |
| Control Architecture | Voltage Mode, Leading-Edge Modulation |
| Interface | I2C, PMBus |
| Package | 40-QFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| Synchronous Rectification | Yes |
| PolyPhase Operation | Up to 8 phases |
| RoHS Status | Compliant |
| Lead Free | Yes |
LTC3882-2#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 | SDA — PMBus data line |
| Pin 6 | SCL — PMBus clock line |
| Pin 7 | ALERT — Fault alert output |
| Pin 8 | RUN1 — Enable for channel 1 |
| Pin 9 | RUN2 — Enable for channel 2 |
| Pin 10 | PGOOD1 — Power good indicator for channel 1 |
| Pin 11 | PGOOD2 — Power good indicator for channel 2 |
| Pin 12 | VREF — Reference voltage output |
Typical Applications
LTC3882-2#PBF is suitable for 6 applications: FPGA/ASIC Power Supplies, Telecom and Networking Equipment, Industrial Power Systems, Data Center and Server Power, Automotive Power Management, Test and Measurement Equipment.
FPGA/ASIC Power Supplies
The LTC3882-2#PBF provides dual, high-current outputs with precise voltage regulation and PMBus monitoring, ideal for powering FPGAs and ASICs. Its PolyPhase capability supports up to 8 phases, delivering high current with low ripple. The PMBus interface enables dynamic voltage scaling and fault monitoring, ensuring reliable operation in demanding computing applications.
Recommended
Telecom and Networking Equipment
In telecom and networking systems, the LTC3882-2#PBF ensures efficient power conversion from 24V buses to core voltages. Its wide input range (4.5V to 24V) and high switching frequency (up to 2.5MHz) reduce component size, while PMBus telemetry allows remote monitoring and control. This enhances system reliability and simplifies power management in distributed architectures.
Recommended
Industrial Power Systems
The LTC3882-2#PBF is suitable for industrial power systems requiring precise voltage regulation and high efficiency. Its voltage mode architecture provides excellent transient response, and the PMBus interface enables configuration and monitoring in harsh environments. The device operates over -40C to +125C, making it robust for industrial applications.
Recommended
Data Center and Server Power
For data center and server applications, the LTC3882-2#PBF delivers high-current, multi-phase power with digital control. Its ability to parallel up to four devices for 8-phase operation ensures scalability for high-power processors. PMBus monitoring allows real-time power management and efficiency optimization, reducing total cost of ownership.
Recommended
Automotive Power Management
In automotive applications, the LTC3882-2#PBF provides reliable power conversion for infotainment and ADAS systems. Its wide input range and high switching frequency enable compact designs, while PMBus interface supports diagnostics and monitoring. The device's robust thermal performance ensures operation in automotive environments.
Recommended
Test and Measurement Equipment
The LTC3882-2#PBF is ideal for test and measurement equipment requiring precise, low-noise power supplies. Its voltage mode architecture provides excellent regulation, and PMBus monitoring enables accurate voltage and current readback. The high switching frequency reduces output ripple, ensuring clean power for sensitive measurement circuits.
Recommended
Recommended Products Summary
Engineering reference data for LTC3882-2#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3882-1#PBF | LTC3882EUJ#PBF | LTC3882IUJ#PBF |
|---|---|---|---|---|
| Package | 40-QFN (6x6 mm) | 40-QFN (6x6 mm) | 40-QFN (6x6 mm) | 40-QFN (6x6 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Max Switching Frequency | 2.5 MHz | 1.25 MHz | 2.5 MHz | 2.5 MHz |
| Input Voltage Range | 4.5V to 24V | 4.5V to 24V | 4.5V to 24V | 4.5V to 24V |
| Output Voltage Range | 0.5V to 5.5V | 0.5V to 5.5V | 0.5V to 5.5V | 0.5V to 5.5V |
| Number of Outputs | 2 | 2 | 2 | 2 |
| Interface | I2C, PMBus | I2C, PMBus | I2C, PMBus | I2C, PMBus |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Higher switching frequency (2.5MHz) vs LTC3882-1 (vs LTC3882-1#PBF)
- PMBus digital power management (vs Analog voltage mode controllers)
- PolyPhase capability up to 8 phases (vs Single-phase controllers)
Design Notes
For high-frequency operation up to 2.5MHz, careful PCB layout is critical. Place the input and output capacitors close to the IC and MOSFETs to minimize parasitic inductance. Use a solid ground plane and short, wide traces for high-current paths. Refer to the LTC3882-1/LTC3882-2 datasheet for recommended layout guidelines.
The LTC3882-2#PBF is a controller and does not dissipate significant power itself, but the external MOSFETs and inductors do. Ensure adequate thermal management for these components, including proper heatsinking and airflow. The 40-QFN package has an exposed pad that should be soldered to a large copper area for heat dissipation.
When paralleling multiple LTC3882-2#PBF devices for multi-phase operation, ensure proper phase interleaving and current sharing. Use the PMBus interface to configure phase relationships and verify correct operation. Also, ensure the input voltage does not exceed the absolute maximum rating of 24V to avoid damage.
Compliance Information
RoHS compliant and lead-free per #PBF suffix. Other compliance data not specified in provided sources.
