原标题：ADI ADP5133双路降压稳压器解决方案

　　ADI公司的ADP5133是2x2mm WLCSP封装的双路800mA高性能降压稳压器, 输入电压2.3V-5.5V,稳压精度±1.8%,工作频率3MHz,输出电压从0.8V到3.8V,主要用在处理器,ASIC,FPGA和RF芯片电源,手持仪表和医疗设备以及空间限制的设备.本文介绍了ADP5133主要特性,框图,几中典型应用电路,以及ADP5133硬件评估板主要特性,电路图,材料清单和四层电路板元件布局图.

　　The ADP5133 combines two high performance buck regulators in a tiny, 16-ball, 2 mm × 2 mm WLCSP to meet demanding performance and board space requirements.

　　The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set high, the buck regulators operate in forced PWM mode. When the MODE pin is set low and the buck regulators operate in PWM mode, the load current is above a predefined threshold. When the load current falls below a predefined threshold, the regulators operate in power save mode (PSM), improving the light load efficiency.

　　The two bucks operate out of phase to reduce the input capacitor requirement and noise.

　　The regulators in the ADP5133 are activated through dedicated enable pins. The output voltages can be externally set through a resistor feedback network.

　　ADP5133主要特性:

　　Input voltage range: 2.3 V to 5.5 V

　　Two 800 mA buck regulators

　　Tiny, 16-ball, 2 mm × 2 mm WLCSP package

　　Regulator accuracy: ±1.8%

　　Factory programmable or external adjustable VOUTx

　　3 MHz buck operation with forced PWM and auto PWM/PSM modes

　　BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V

　　ADP5133应用:

　　Power for processors, ASICs, FPGAs, and RF chipsets

　　Portable instrumentation and medical devices

　　Space constrained devices

　　图1. ADP5133框图

　　图2. ADP5133典型应用电路图

　　图3. ADP5133典型应用电路图:固定输出电压

　　图4. ADP5133典型应用电路图:可调输出电压

　　ADP5133硬件评估板

　　The hardware for the evaluation of the ADP5133 and includes detailed schematics and PCB layouts. The ADP5133 is available in a 16-ball, 2mm × 2mm WLCSP package.

　　The ADP5133 evaluation board enables evaluation of the ADP5133 dual step-down regulator. The evaluation board is available in standard voltage options.

　　ADP5133硬件评估板主要特性:

　　Full-featured evaluation board for the ADP5133

　　Simple device measurements, including line and load regulation, demonstrable with

　　A single voltage supply

　　A current meter

　　Load resistors

　　Easy access to external components

　　Dedicated enable option for each channel

　　Mode option to change bucks from PSM to PWM operation