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特性
- Space-Optimized Solution
- Monolithic, Smart Power Stage
- Integrated VCC and VDD Capacitors
- Phase-Current Steering for Thermal Balance
- Small Footprint: 20mm2
- Peak Efficiency 1-Phase, 600kHz, 12V VIN
- 92.4% at 1V VOUT
- 95% at 1.8V VOUT
- 300kHz to 1.3MHz Switching Frequency
- Telemetry and Fault Reporting through Controller IC PMBus
- Accurate Temperature Monitoring and Reporting
- Accurate Per-Phase Current Reporting
- Fault_ID Indicates Type of Fault
- Advanced Self-Protection Features*
- Supply and Boost UVLO Protection
- Input Supply OVLO Protection
- Boost Refresh
- VX Short and Overtemperature Shutdown
- VX Open and Short Detection at Power-up
- Fast Overcurrent Protection
- Inductor Saturation Protection
- Open/Short Pin Detection during Startup
- *Protection features vary with different part variants
产品详情和应用
The MAX20844B/MAX20845B is a feature-rich smart power-stage IC designed to work with Analog Devices controllers to implement a high-density multiphase voltage regulator. Multiple smart power-stage ICs plus a controller provide a compact synchronous buck converter that includes accurate individual phase current and temperature reporting through PMBus™. These smart power-stage devices include fault-protection circuits for overtemperature, VX short, I/O open/short, supply undervoltage lockout (UVLO), and main power-supply overvoltage lockout (OVLO). The MAX20844B/ MAX20845B immediately shut down on fault detection, communicating the Fault_ID to the controller.
Monolithic integration and advanced packaging technology allow high-switching frequencies with significantly lower losses than conventional implementations. Phase shedding and discontinuous conduction modes (DCM) optimize efficiency over a wide range of load currents. The MAX20845B integrates an internal LDO simplifying bias generation for applications that do not have 1.8V available.
The MAX20844B/MAX20845B are available in a 30-pin FCLGA package thermal pad (4mm x 5mm).
APPLICATIONS
- Mid-Current Voltage Regulators
- VR13, VR13.HC, and VR14 CPU Low-Power Rails
- AI, GPUs Auxiliary Rails
- Servers, Workstations, and Enterprise Storage
- Communications and Networking Equipment
