LTC3882-2 - Dual PolyPhase Step-Down Controller | Analog Devices
MPN: LTC3882-2 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.9 | $4,450.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for LTC3882-2 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LTC3882-1
β Drop-Inβ In Stock
$8 / Unit
View Datasheet βLTC3882EUJ-1
β Drop-Inπ Reference alternative (not in catalog)
LTC3882EUJ-2
β Drop-Inπ Reference alternative (not in catalog)
LTC3880
β Drop-Inπ Reference alternative (not in catalog)
LTC3883
β Drop-Inπ Reference alternative (not in catalog)
LTC3882-2 Maximum Ratings & Electrical Characteristics
| Topology | Dual Output PolyPhase Step-Down |
| Control Architecture | Voltage Mode, Leading-Edge Modulation |
| Input Voltage Range | 4.5V to 24V |
| Output Voltage Range | 0.5V to 5.5V |
| Number of Outputs | 2 |
| Phases per Output | 1 to 4 (up to 8 phases with 4 devices) |
| Switching Frequency | [DATA_NEEDED: Switching frequency range] |
| Interface | PMBus Compliant Serial Interface |
| Package | 40-pin QFN (6mm x 6mm) |
| Operating Junction Temperature | -40Β°C to +125Β°C |
| Gate Drivers | Integrated High-Side and Low-Side |
| Current Sensing | Accurate, Supports External MOSFETs |
| Telemetry | Readback of Input Voltage, Output Voltage, Current, Temperature, Fault Status |
| Software Support | LTpowerPlay |
| RoHS Status | Compliant |
LTC3882-2 Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | VOUT1 β Output voltage sense for channel 1 |
| Pin 3 | VOUT2 β Output voltage sense for channel 2 |
| Pin 4 | GND β Ground |
| Pin 5 | SDA β PMBus data line |
| Pin 6 | SCL β PMBus clock line |
| Pin 7 | ALERT β Fault alert output |
| Pin 8 | RUN1 β Enable for channel 1 |
| Pin 9 | RUN2 β Enable for channel 2 |
| Pin 10 | PGOOD1 β Power good indicator for channel 1 |
| Pin 11 | PGOOD2 β Power good indicator for channel 2 |
| Pin 12 | SW1 β Switch node for channel 1 |
| Pin 13 | SW2 β Switch node for channel 2 |
| Pin 14 | TG1 β High-side gate drive for channel 1 |
| Pin 15 | BG1 β Low-side gate drive for channel 1 |
| Pin 16 | TG2 β High-side gate drive for channel 2 |
| Pin 17 | BG2 β Low-side gate drive for channel 2 |
| Pin 18 | VDD β Internal supply |
| Pin 19 | VREF β Reference voltage |
| Pin 20 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LTC3882-2 is suitable for 6 applications: High-Current FPGA Power Supplies, Server and Datacenter Power Distribution, Telecom and Networking Equipment, Industrial Power Systems, Automotive Power Management, Test and Measurement Equipment.
High-Current FPGA Power Supplies
The LTC3882-2 is ideal for powering high-current FPGAs and ASICs. Its dual outputs and multi-phase capability (up to 8 phases) deliver the low-voltage, high-current rails required by modern FPGAs. The PMBus interface enables precise voltage margining and monitoring, ensuring reliable operation. With an input range of 4.5V to 24V, it can step down from intermediate bus voltages efficiently. The voltage mode control provides excellent transient response, crucial for FPGA load steps. According to Analog Devices, the LTC3882-2 supports up to four devices in parallel for 2-, 3-, 4-, 6- or 8-phase operation, making it scalable for high-current demands.
Recommended
Server and Datacenter Power Distribution
In server and datacenter applications, the LTC3882-2 provides efficient, digitally managed power for CPUs, memory, and I/O. Its PMBus interface allows remote monitoring and control, essential for datacenter power management. The multi-phase operation reduces output ripple and improves transient response, meeting the stringent requirements of server loads. The wide input voltage range accommodates various bus voltages, and the high efficiency reduces cooling requirements. The LTC3882-2's telemetry capabilities enable predictive maintenance and energy optimization, making it a key component in modern datacenter power systems.
Recommended
Telecom and Networking Equipment
The LTC3882-2 is well-suited for telecom and networking equipment that requires reliable, high-efficiency power conversion. Its dual outputs can power different voltage rails, such as core and I/O, with independent control. The PMBus interface enables configuration and monitoring, simplifying system management. The device's robust protection features, including overcurrent and overtemperature protection, ensure reliable operation in demanding environments. The compact QFN package saves board space, and the multi-phase capability supports high-current loads typical in networking hardware.
Recommended
Industrial Power Systems
In industrial applications, the LTC3882-2 provides precise voltage regulation and monitoring for control systems, motor drives, and automation equipment. Its wide input voltage range (4.5V to 24V) accommodates various industrial supply rails. The PMBus interface allows integration into industrial control networks for remote monitoring and diagnostics. The device's high efficiency reduces heat dissipation, and its robust design withstands harsh industrial environments. The multi-phase operation ensures stable power delivery even under heavy load transients, making it suitable for critical industrial processes.
Recommended
Automotive Power Management
The LTC3882-2 can be used in automotive power management for infotainment, ADAS, and body control modules. Its wide input voltage range handles automotive battery voltages (e.g., 12V systems). The PMBus interface enables configuration and diagnostics, supporting automotive quality standards. The device's high efficiency reduces power loss and heat, important in automotive environments. The multi-phase operation provides stable power for processors and sensors. However, for automotive-grade requirements, consider the LTC3882-1 or other AEC-Q100 qualified parts.
Recommended
Test and Measurement Equipment
The LTC3882-2 is suitable for test and measurement equipment that requires precise, low-noise power supplies. Its voltage mode control provides excellent regulation and low output ripple, essential for accurate measurements. The PMBus interface allows programmable output voltages and monitoring, enabling automated test setups. The device's high efficiency reduces heat, and its compact package saves space. The multi-phase operation can provide high currents for power-hungry test circuits. According to Analog Devices, the LTC3882-2 supports LTpowerPlay for easy configuration.
Recommended
Recommended Products Summary
Engineering reference data for LTC3882-2 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3882-1 | LTC3882EUJ-1 | LTC3882EUJ-2 | LTC3880 | LTC3883 |
|---|---|---|---|---|---|---|
| Package | 40-pin QFN (6mm x 6mm) | 40-pin QFN (6mm x 6mm) | 40-pin QFN (6mm x 6mm) | 40-pin QFN (6mm x 6mm) | 40-pin QFN (6mm x 6mm) | 40-pin QFN (6mm x 6mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Outputs | 2 | 2 | 2 | 2 | 2 | 1 |
| Input Voltage Range | 4.5V to 24V | 4.5V to 24V | 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 | 0.5V to 5.5V | 0.5V to 5.5V |
| PMBus Interface | Yes | Yes | Yes | Yes | Yes | Yes |
| Max Phases | 8 (with 4 devices) | 8 (with 4 devices) | 8 (with 4 devices) | 8 (with 4 devices) | 6 (with 3 devices) | 1 |
| Operating Temperature Range | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C |
Key Differentiators
- Supports up to 8 phases with four devices (vs LTC3880)
- Dual outputs with independent control (vs LTC3883)
- Voltage mode control with leading-edge modulation (vs LTC3880)
Design Notes
For high-current applications, ensure proper PCB layout with low-impedance paths for the power stage. Use wide copper traces for VIN, SW, and GND to minimize voltage drops and parasitic inductance. Place the LTC3882-2 close to the MOSFETs and output capacitors to reduce loop area and improve transient response. Follow the layout guidelines in the datasheet for optimal performance.
The LTC3882-2 itself dissipates minimal power, but the external MOSFETs and inductors generate significant heat. Ensure adequate thermal management, such as heatsinks or forced airflow, to keep the junction temperature of the MOSFETs within limits. The QFN package of the controller has an exposed pad that should be soldered to a copper pour for heat dissipation.
When using the PMBus interface, ensure proper I2C address configuration and bus termination to avoid communication errors. Also, verify the switching frequency and loop compensation settings to ensure stability. Incorrect configuration can lead to output voltage inaccuracies or instability. Use LTpowerPlay to simulate and verify settings before hardware implementation.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider LTC3882-1 or other qualified parts.
