LTC3882-1 - Dual Output PolyPhase Step-Down Controller | Analog Devices
MPN: LTC3882-1 β 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 | $8,000.00 |
Drop-in alternatives for LTC3882-1 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:
LTC3882-2
β Drop-Inβ In Stock
$8.1 / Unit
View Datasheet βLTC3882
β Drop-Inπ Reference alternative (not in catalog)
LTC3888
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LTC3888-1
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LTC3888-2
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TPS53647
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TPS53659
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ISL68200
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LTC3882-1 Maximum Ratings & Electrical Characteristics
| Topology | Step-Down (Buck) |
| Number of Outputs | 2 |
| Output Voltage Range | 0.1V to 5.25V |
| Input Voltage Range | [DATA_NEEDED: Input voltage range] |
| Switching Frequency | [DATA_NEEDED: Switching frequency] |
| Control Architecture | Voltage Mode |
| Modulation | Leading-Edge |
| Interface | PMBus |
| Phase Configuration | 2, 3, 4, 6, or 8 phases |
| Current Sensing | Sub-Milliohm DCR |
| Package | 40-pin QFN |
| Operating Temperature Range | 0Β°C to 85Β°C (LTC3882-1E) |
| Junction Temperature Range | -40Β°C to 125Β°C |
| Bias Supply Voltage | 3.3V |
| RoHS Status | Compliant |
LTC3882-1 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 | PWM1 β PWM output for channel 1 |
| Pin 11 | PWM2 β PWM output for channel 2 |
| Pin 12 | VBIAS β Bias supply voltage (3.3V) |
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
LTC3882-1 is suitable for 6 applications: Server Power, Networking Equipment, Data Center Power, Industrial Power, Telecommunications, FPGA Power.
Server Power
The LTC3882-1 is ideal for server power delivery, providing high-current, multi-phase regulation for CPUs, GPUs, and memory. Its PMBus interface enables real-time monitoring and control, essential for data center efficiency. With support for up to 8 phases, it can deliver currents exceeding 100A while maintaining tight voltage regulation. The sub-milliohm DCR sensing reduces power loss and improves efficiency, making it suitable for high-density server boards.
Recommended
Networking Equipment
In networking equipment, the LTC3882-1 provides precise voltage regulation for ASICs, FPGAs, and line cards. Its constant frequency, voltage mode architecture ensures stable operation with fast transient response, critical for handling bursty network traffic. The PMBus interface allows remote monitoring and fault management, reducing downtime. The ability to parallel multiple devices supports scalable power architectures for high-port-count switches and routers.
Recommended
Data Center Power
The LTC3882-1 is well-suited for data center power distribution, offering high efficiency and digital management. Its multi-phase capability enables high-current delivery with reduced output ripple, improving power quality. The PMBus interface supports telemetry and dynamic voltage scaling, optimizing energy consumption. The device's wide output voltage range (0.1V to 5.25V) accommodates various loads, from low-voltage cores to I/O rails.
Recommended
Industrial Power
In industrial applications, the LTC3882-1 provides robust, reliable power conversion for PLCs, motor drives, and test equipment. Its wide operating temperature range (-40Β°C to 125Β°C junction) ensures performance in harsh environments. The PMBus interface enables remote configuration and monitoring, simplifying maintenance. The device's voltage mode architecture offers stable operation with a variety of output capacitors, reducing design complexity.
Recommended
Telecommunications
The LTC3882-1 is used in telecommunications infrastructure for powering base stations, routers, and switches. Its high efficiency reduces heat dissipation, critical for outdoor and enclosed environments. The PMBus interface supports remote monitoring and control, enabling proactive maintenance. The device's ability to parallel multiple units allows for scalable power delivery, accommodating varying load demands in telecom networks.
Recommended
FPGA Power
The LTC3882-1 is ideal for powering FPGAs, providing multiple output rails with precise voltage regulation. Its PMBus interface allows dynamic voltage scaling, optimizing power consumption for different FPGA workloads. The device's high phase count supports high-current cores, while its low output noise ensures reliable operation of sensitive logic. The compact 40-pin QFN package saves board space in dense FPGA designs.
Recommended
Recommended Products Summary
Engineering reference data for LTC3882-1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC3882-2 | LTC3882 | LTC3888 | TPS53647 |
|---|---|---|---|---|---|
| Package | 40-pin QFN | 40-pin QFN | 40-pin QFN | 40-pin QFN | 40-pin QFN |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Outputs | 2 | 2 | 2 | 2 | 2 |
| Output Voltage Range | 0.1V to 5.25V | 0.1V to 5.25V | 0.1V to 5.25V | [DATA_NEEDED] | [DATA_NEEDED] |
| Phase Configuration | 2, 3, 4, 6, 8 | 2, 3, 4, 6, 8 | 2, 3, 4, 6, 8 | Up to 8 | [DATA_NEEDED] |
| Control Architecture | Voltage Mode | Voltage Mode | Voltage Mode | Current Mode | [DATA_NEEDED] |
| Interface | PMBus | PMBus | PMBus | PMBus | PMBus |
| Current Sensing | Sub-Milliohm DCR | Sub-Milliohm DCR | Sub-Milliohm DCR | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Sub-milliohm DCR sensing (vs TPS53647)
- Up to 8-phase operation (vs LTC3882)
- Voltage mode architecture (vs LTC3888)
Design Notes
Ensure the bias supply (VBIAS) is properly decoupled with a 1uF ceramic capacitor close to the pin. The LTC3882-1 operates from a 3.3V bias supply; inadequate decoupling can cause instability in the control loop.
For high-current applications, use a 4-layer PCB with dedicated power and ground planes. Place the power stage components (MOSFETs, inductors) close to the controller to minimize parasitic inductance. Use Kelvin connections for current sensing to improve accuracy.
Route the PMBus lines (SDA, SCL) as a differential pair with proper termination. Keep them away from high-current switching nodes to avoid noise coupling. Use pull-up resistors as specified in the datasheet.
Compliance Information
RoHS compliance is assumed based on Analog Devices standard practice, but not explicitly stated in the provided data.
