General Description

The MAX20815 is a fully integrated, highly efficient, step-down DC-DC switching regulator with PMBus interface. The device operates from 2.7V to 16V input supplies, and the output can be adjusted from 0.4V to 5.8V, delivering up to 15A of load current.

The switching frequency of the device can be configured from 500kHz to 2MHz, to provide the capability of optimizing the design in terms of size and performance.

The MAX20815 utilizes fixed frequency, current-mode control with internal compensation. The IC features selectable advanced modulation scheme (AMS) to provide improved performance during fast load transients. Operation settings and configurable features can be selected by connecting a pin-strap resistors from PGM_ pins to ground or using PMBus commands.

The MAX20815 has an internal 1.8V LDO output to power the gate drives (VCC) and internal circuitry (AVDD). The device also has an optional LDO input pin (LDOIN), allowing connection from a 2.5V to 5.5V bias input supply for optimized efficiency.

The IC has multiple protections including positive and negative overcurrent protection, output overvoltage protection, and overtemperature protection to ensure robust design.

The device is available in a 4.3mm x 6.55mm FC2QFN package. It supports -40°C to +125°C junction temperature operation. The MAX20815 is footprint compatible with the MAX20810 and MAX20830.

Benefits and Features

•High Power Density with Low Component Count

•Compact 4.3mm x 6.55mm, 16-Pin, FC2QFNPackage

•Internal Compensation

•Single-Supply Operation with Integrated LDO forBias Generation

•Wide Operating Range

•2.7V to 16V Input Voltage Range

•0.4V to 5.8V Output Voltage Range

•500kHz to 2MHz Configurable SwitchingFrequency

•-40°C to +125°C Junction Temperature Range

•Optimized Performance and Efficiency

•93.8 Peak Efficiency with VDDH = 12V andVOUT = 1.8V

•High Efficiency with Optional External Bias InputSupply

•AMS to Improve Load-Transient Response

•Differential Remote Sense

•PMBus Interface

•Adaptive Voltage Scaling of 0.4V to 0.8VReference Range

•PMBus Telemetry of Output Current, OutputVoltage, Input Voltage, and Junction Temperature

Applications

•Data Center Power

•Communications Equipment

•Networking Equipment

•Servers and Storage

•Point-of-Load (PoL) Voltage Regulators