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
$8.1 / Unit
View Datasheet βLTC3882
β Drop-Inπ Reference alternative (not in catalog)
LTC3882EUJ-1
β Drop-Inπ Reference alternative (not in catalog)
LTC3882EUJ-2
β Drop-Inπ Reference alternative (not in catalog)
TPS53679
β Drop-Inπ Reference alternative (not in catalog)
LTC3882-2 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Step-Down (Buck) |
| Number of Outputs | 2 |
| Input Voltage Range | 4.5 V to 24 V |
| Output Voltage Range | 0.5 V to 5.5 V |
| Switching Frequency | 250 kHz to 1 MHz |
| Control Architecture | Voltage Mode, Leading-Edge Modulation |
| Interface | PMBus (I2C) |
| Phase Configuration | 2, 3, 4, 6, or 8 phases (up to 4 devices) |
| Package | QFN-40 (6mm x 6mm) |
| Operating Temperature Range | -40Β°C to +125Β°C (junction) |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| Gate Drivers | Integrated high-side and low-side |
| Current Sensing | Inductor DCR or sense resistor |
| Fault Protection | OVP, OCP, OTP, UVLO |
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 | GATE1_H β High-side gate drive for channel 1 |
| Pin 8 | GATE1_L β Low-side gate drive for channel 1 |
| Pin 9 | GATE2_H β High-side gate drive for channel 2 |
| Pin 10 | GATE2_L β Low-side gate drive for channel 2 |
| Pin 11 | VDD β Internal supply voltage |
| Pin 12 | VREF β Reference voltage output |
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: FPGA and ASIC Power Supplies, Server and Datacenter Power, Telecom and Networking Equipment, Industrial Power Systems, Automotive Power Management, Test and Measurement Equipment.
FPGA and ASIC Power Supplies
The LTC3882-2 provides dual, high-current outputs with precise voltage regulation and PMBus telemetry, making it ideal for powering FPGA cores and I/O rails. Its multi-phase capability supports up to 8 phases for currents exceeding 100A. The programmable output voltage from 0.5V to 5.5V accommodates various core voltages, while the PMBus interface enables dynamic voltage scaling and monitoring. The wide input range (4.5V to 24V) allows direct operation from 12V intermediate buses, simplifying the power architecture. The integrated gate drivers reduce external component count, and the voltage mode control ensures stable operation under fast load transients typical of FPGAs.
Recommended
Server and Datacenter Power
In server and datacenter applications, the LTC3882-2 delivers high-efficiency, multi-phase power for CPUs, GPUs, and memory. Its PMBus interface allows real-time monitoring of voltage, current, and temperature, enabling intelligent power management and fault prediction. The ability to parallel up to four devices for 8-phase operation supports the high currents required by modern processors. The wide input range accommodates 12V and 24V bus architectures, and the voltage mode control provides excellent transient response for dynamic loads. The device's fault protection features (OVP, OCP, OTP) enhance system reliability, making it a preferred choice for mission-critical datacenter equipment.
Recommended
Telecom and Networking Equipment
The LTC3882-2 is well-suited for telecom and networking equipment, where reliable and efficient power conversion is critical. Its dual outputs can power line cards, switches, and routers, while the PMBus interface enables remote monitoring and control. The device supports a wide input voltage range (4.5V to 24V), making it compatible with standard telecom voltages. The multi-phase capability allows scaling to high currents for ASICs and FPGAs used in networking. The voltage mode control ensures stable operation in noisy environments, and the integrated gate drivers simplify the design. The device's small QFN package saves board space, which is valuable in dense telecom equipment.
Recommended
Industrial Power Systems
In industrial applications, the LTC3882-2 provides robust, digitally managed power for PLCs, motor drives, and test equipment. Its wide input range (4.5V to 24V) handles various industrial supply rails, and the PMBus interface allows configuration and monitoring in harsh environments. The device's fault protection features (OVP, OCP, OTP) ensure reliable operation, and the -40Β°C to +125Β°C junction temperature range suits industrial temperature extremes. The multi-phase capability supports high-current loads, and the voltage mode control provides stable output under varying load conditions. The integrated gate drivers reduce component count, and the QFN package is suitable for space-constrained industrial designs.
Recommended
Automotive Power Management
The LTC3882-2 can be used in automotive power management for infotainment, ADAS, and body electronics, where efficient and reliable power conversion is required. Its wide input range (4.5V to 24V) covers automotive battery voltages, and the PMBus interface enables diagnostics and monitoring. The device's fault protection features enhance safety, and the -40Β°C to +125Β°C temperature range meets automotive requirements. The multi-phase capability supports high-current loads for processors and sensors. The voltage mode control ensures stable operation under load transients, and the integrated gate drivers simplify the design. The QFN package is suitable for automotive PCB layouts.
Recommended
Test and Measurement Equipment
The LTC3882-2 is ideal for test and measurement equipment, where precise and stable power supplies are essential. Its dual outputs can power analog and digital sections, and the PMBus interface allows precise voltage setting and monitoring. The wide input range (4.5V to 24V) accommodates various bench supply voltages, and the low output noise (due to voltage mode control) is beneficial for sensitive measurements. The multi-phase capability supports high-current loads for power-hungry instruments. The device's fault protection features ensure safe operation, and the QFN package is compact for benchtop instruments. The PMBus interface enables automated testing and calibration.
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 | LTC3882 | TPS53679 |
|---|---|---|---|---|
| Package | QFN-40 (6mm x 6mm) | QFN-40 (6mm x 6mm) - same | QFN-40 (6mm x 6mm) - same | QFN-40 (6mm x 6mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 4.5V to 24V | 4.5V to 24V | 4.5V to 24V | 4.5V to 16V |
| Output Voltage Range | 0.5V to 5.5V | 0.5V to 5.5V | 0.5V to 5.5V | 0.25V to 5.5V |
| Number of Outputs | 2 | 2 | 2 | 2 |
| Max Phases | 8 | 8 | 8 | 8 |
| Switching Frequency | 250kHz to 1MHz | 250kHz to 1MHz | 250kHz to 1MHz | 200kHz to 1MHz |
| PMBus Interface | Yes | Yes | Yes | Yes |
Key Differentiators
- Dual outputs with PMBus digital control (vs TPS53679)
- Up to 8 phases with multiple devices (vs LTC3882-1)
- Integrated gate drivers reduce BOM (vs TPS53679)
Design Notes
For high-current applications, use wide, short traces for the power path and place the input and output capacitors close to the MOSFETs and inductor. The LTC3882-2's gate drivers require low-inductance paths to the MOSFETs to minimize ringing. Use a solid ground plane and multiple vias for thermal relief. Refer to the datasheet's layout guidelines for optimal performance.
The LTC3882-2 itself dissipates minimal power, but the external MOSFETs and inductor generate significant heat at high currents. Ensure adequate airflow or heatsinking for the power stage. The QFN package has an exposed pad that should be soldered to a large copper area for heat dissipation. Monitor the junction temperature via the PMBus telemetry to prevent overheating.
When paralleling multiple LTC3882-2 devices for multi-phase operation, ensure proper clock synchronization and address assignment via PMBus. Incorrect I2C addresses can cause bus conflicts. Also, verify that the inductor DCR sensing is calibrated correctly to avoid current imbalance. Use the LTpowerPlay software to configure and debug the system.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider other qualified parts.
