Maxim MAX77812 20A用户配置四相降压电源解决方案

Maxim公司的MAX77812是20A用户配置高效四相降压电源转换器,每相最大输出电流5A,VIN电压2.5V-5.5V,可调输出电压0.250V 到1.525V,每步5mV,输出精度±0.5%,5个用户可选择的相配置,峰值效率91%(VIN = 3.8V, VOUT = 1.1V),具有自动(SKIP/PWM)和强迫PWM模式,3.4MHz高速I2C和30MHz SPI 接口,主要用在CPU/GPU,FPGA和DSP电源,AR/VR耳机和游戏控制台,锂电池电源的设备,以及空间受限的手持设备.本文介绍了MAX77812主要优势和特性,框图和应用电路,以及评估板MAX77812 EVK主要特性,各种相配置硬件建立图,电路图,材料清单和PCB设计图.
The MAX77812 is a quad-phase high-efficiency step-down (buck) converter capable of delivering up to 20A of maximum current. Programmable startup/shutdown sequence and user-selectable phase configurations make the MAX77812 ideal for powering the latest generations of processors. With high-efficiency and small solution size, the MAX77812 is optimized for space constrained single-cell battery powered applications.
The MAX77812 uses an adaptive on-time PWM control scheme and it has SKIP and low-power SKIP modes for improved light-load efficiency. A programmable current limit reduces the overall solution footprint by optimizing inductors size. Differential sensing provides high output voltage accuracy, while enhanced transient response (ETR) allows fast output voltage adjustments to load tran­sients. Programmable soft-start/stop and ramp-up/down slew rate provides control over an inrush current as the regulator transitions between operating states.
A 3.4MHz high-speed I2C or 30MHz SPI interface with dedicated logic inputs provide full configurability and control for system power optimization.
The MAX77812 is available in 3.408mm x 3.368mm, 64-bump 0.4mm pitch wafer-level package (WLP).
MAX77812主要优势和特性:
20A Maximum Output Current (5A per Phase)
VIN Range: 2.5V to 5.5V
VOUT Range: 0.250V to 1.525V with 5mV Steps
±0.5% Initial Output Accuracy with Differential Sensing
5 User-Selectable Phase Configurations
91% Peak Efficiency (VIN...