LTC3882-1 - Dual Output PolyPhase Step-Down Controller | Analog Devices
MPN: LTC3882-1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.9 | $7,900.00 |
LTC3882-1 Overview
A switching regulator controller is an integrated circuit that manages the power conversion process in a DC-DC step-down (buck) converter. Unlike a linear regulator, it uses high-frequency switching of power transistors to efficiently step down voltage, making it ideal for high-current applications where efficiency and thermal management are critical. The LTC3882-1 belongs to the family of digital power system management controllers, which combine analog regulation with digital monitoring and control via PMBus, allowing precise voltage and current management in complex systems.
Key features include a PMBus compliant serial interface for system configuration and monitoring, readback of input voltage, output voltage, current, temperature, and fault status. The device supports sub-milliohm DCR sensing for accurate current measurement without high-power sense resistors. It also features constant frequency operation with leading-edge modulation for excellent transient response. The LTC3882-1 is available in a 40-pin QFN package, suitable for compact power designs.
Technically, the LTC3882-1 integrates a digital power system management engine with analog control loops, enabling precise regulation and telemetry. The voltage mode architecture provides stable operation with a wide range of output capacitors. The PMBus interface allows real-time monitoring and configuration, reducing the need for external components and simplifying system design. The device operates from a 3.3V bias supply and can drive external power stages, making it flexible for various topologies.
Typical applications include high-current point-of-load converters for servers, networking equipment, and data centers, where multiple phases are needed to deliver currents exceeding 100A. It is also used in industrial and telecommunications systems requiring precise voltage regulation and digital monitoring. The LTC3882-1's ability to parallel multiple devices makes it ideal for scalable power architectures.
When designing with the LTC3882-1, ensure proper decoupling of the bias supply and careful layout of the power stage to minimize parasitic inductance. Use the LTpowerPlay software tool for system configuration and monitoring, which simplifies the design process and ensures optimal performance.
Drop-in alternatives for LTC3882-1 — 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 (same form factor and footprint) — differing in Package, Control Architecture, RoHS Status, Output Voltage Range, Serial Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC3882-2
✅ Drop-In✓ In Stock
$11.25 / Unit
View Datasheet →LTC3882
✅ Drop-In📋 Reference alternative (not in catalog)
TPS53632
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.6 / Unit
View Datasheet →TPS53659
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISL68224
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTC3882-1 Maximum Ratings & Electrical Characteristics
| Topology | Dual Output PolyPhase Step-Down Controller |
| Output Voltage Range | 0.1V to 5.25V |
| Number of Outputs | 2 |
| Phases | 2, 3, 4, 6, or 8 (up to 4 devices in parallel) |
| Control Architecture | Constant Frequency, Leading-Edge Modulation, Voltage Mode |
| Serial Interface | PMBus Compliant |
| Current Sensing | Sub-Milliohm DCR Sensing |
| Bias Supply Voltage | 3.3V |
| Package | 40-pin QFN |
| Mounting Type | Surface Mount |
LTC3882-1 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 — PMBus alert output |
| Pin 8 | VDD — Bias supply voltage (3.3V) |
| Pin 9 | PWM1 — PWM output for channel 1 |
| Pin 10 | PWM2 — PWM output for channel 2 |
Typical Applications
LTC3882-1 is suitable for 6 applications: Server Power, Networking Equipment, Data Center Power, Industrial Power, Telecommunications, FPGA and ASIC Power.
Server Power
The LTC3882-1 is ideal for server power delivery, providing high-current, multi-phase regulation for CPU and memory rails. Its PMBus interface enables real-time monitoring and control, ensuring efficient and reliable operation in data centers. With support for up to 8 phases, it can deliver currents exceeding 100A, meeting the demanding requirements of modern servers.
Recommended
Networking Equipment
In networking equipment, the LTC3882-1 provides precise voltage regulation for high-performance ASICs and FPGAs. Its constant frequency, leading-edge modulation ensures excellent transient response, critical for handling variable network traffic. The PMBus interface allows system-level power management, reducing energy consumption and improving reliability in routers and switches.
Recommended
Data Center Power
The LTC3882-1 is well-suited for data center power distribution, offering scalable multi-phase operation for high-current loads. Its sub-milliohm DCR sensing enables accurate current measurement without power loss, improving overall efficiency. The device's digital power management capabilities allow for precise voltage and current control, essential for maintaining uptime in critical infrastructure.
Recommended
Industrial Power
For industrial applications, the LTC3882-1 provides robust, efficient power conversion with digital monitoring. Its wide output voltage range and multi-phase capability make it suitable for various industrial loads, from motor drives to control systems. The PMBus interface enables remote monitoring and diagnostics, reducing maintenance costs and improving system reliability in harsh environments.
Recommended
Telecommunications
In telecommunications, the LTC3882-1 ensures stable power for base stations and communication equipment. Its high efficiency and precise regulation are critical for maintaining signal integrity and reducing heat dissipation. The device's ability to parallel multiple units supports scalable power architectures, accommodating future expansion in telecom networks.
Recommended
FPGA and ASIC Power
The LTC3882-1 is ideal for powering FPGAs and ASICs that require multiple low-voltage, high-current rails. Its dual output and multi-phase capability allow it to supply core, I/O, and auxiliary voltages with excellent transient response. The PMBus interface enables dynamic voltage scaling and power sequencing, optimizing performance and energy efficiency in complex digital systems.
Recommended
Recommended Products Summary
Engineering reference data for LTC3882-1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3882-2 | LTC3882 | TPS53632 |
|---|---|---|---|---|
| Package | 40-pin QFN | 40-pin QFN | 40-pin QFN | 40-pin QFN |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Outputs | 2 | 2 | 2 | 2 |
| Serial Interface | PMBus | PMBus | PMBus | PMBus |
Key Differentiators
- Sub-milliohm DCR sensing (vs TPS53632)
- Up to 8-phase operation (vs TPS53632)
- PMBus with LTpowerPlay support (vs TPS53659)
Design Notes
Ensure the bias supply (VDD) is properly decoupled with a 1uF ceramic capacitor placed close to the pin. The LTC3882-1 operates from a 3.3V bias supply, and inadequate decoupling can cause instability in the control loop. Use a low-ESR capacitor to maintain clean power for the internal digital circuitry.
For high-current applications, use a multi-layer PCB with dedicated power and ground planes. Minimize parasitic inductance in the power stage by placing the MOSFETs and inductors close to the controller. Use wide copper traces for high-current paths and ensure adequate thermal vias for heat dissipation.
When paralleling multiple LTC3882-1 devices, ensure proper phase alignment and address assignment via the PMBus interface. Incorrect configuration can lead to current imbalance and reduced efficiency. Use the LTpowerPlay software tool to simplify setup and verify all parameters before production.
Compliance Information
Compliance information not explicitly stated in the provided data. Refer to the datasheet or contact Analog Devices for RoHS, REACH, and other compliance details.
