原标题：Intersil ZL9101M数字12A DC电源解决方案

　　Intersil公司的 ZL9101M是数字DC/DC PMBus 12A 电源模块，模块中包括有高性能的数字PWM控制器，功率MOSFET，电感和所有的无源元件，形成了完整的DC/DC电源解决方案。输入电压很宽，输出电压0.6-4V，可通过PMBus采用外设电阻设定。模块主要用在服务器，通信和数据通信，工业和医疗设备以及通用的点负载。本文介绍了ZL9101M 主要特性，12A 应用电路以及.

　　The ZL9101M is a 12A variable output step-down PMBus-compliant digital power supply. Included in the module is a high performance digital PWM controller, power MOSFETs, an inductor, and all the passive components required for a complete DC/DC power solution. The ZL9101M operates over a wide input voltage range and supports an output voltage range of 0.6V to 4V, which can be set by external resistors or via PMBus. This high efficiency power module is capable of delivering 12A. Only bulk input and output capacitors are needed to finish the design. The output voltage can be precisely regulated to as low as 0.6V with ±1% output voltage regulation over line, load, and temperature variations.

　　The ZL9101M features internal compensation, internal soft-start, auto-recovery overcurrent protection, an enable option, and pre-biased output start-up capabilities.

　　The ZL9101M is packaged in a thermally enhanced, compact (15mmx15mm) and low profile (3.5mm) over-molded QFN package module suitable for automated assembly by standard surface mount equipment. The ZL9101M is Pb-free and RoHS compliant.

　　ZL9101M 主要特性：

　　• Complete Digital Switch Mode Power Supply

　　• Fast Transient Response

　　• External Synchronization

　　• Output Voltage Tracking

　　• Current Sharing

　　• Programmable Soft-start Delay and Ramp

　　• Overcurrent/Undercurrent Protection

　　• PMBus Compliant

　　ZL9101M 应用：

　　• Server, Telecom, and Datacom

　　• Industrial and Medical Equipment

　　• General Purpose Point of Load

　　图1。ZL9101M 12A 应用电路

　　图1。两个ZL模块的电流共享组合电路

　　ZL9101EVAL1Z数字DC/DC 12A模块评估板

　　ZL9101EVAL1Z Digital DC/DC 12A Module Evaluation Board

　　图2。ZL9101EVAL1Z数字DC/DC 12A模块评估板外形图

　　The ZL9101M is a 12A variable output, step-down power supply module. Included in the module is a high-performance digital PWM controller, power MOSFETs, an inductor, and all the passive components required for a complete DC/DC power solution. The ZL9101M operates over a wide input voltage range and supports an output voltage range of 0.6V to 4V, which can be set by external resistors or via the PMBus. This high-efficiency power module is capable of delivering 12A.

　　Only bulk input and output capacitors are needed to finish the design. The output voltage can be precisely regulated to as low as 0.6V with ±1% output voltage regulation.

　　The ZL9101EVAL1Z is a 6-layer board that provides a single-phase power rail up to 12A loads. The board is designed to efficiently transfer heat away from the module with passive cooling.

　　A USB to SMBus adapter is used to connect the ZL9101EVAL1Z board to a PC. The PMBus command set is accessed by using the PowerNavigator™ evaluation software.

　　DC/DC 12A模块评估板主要特性：

　　• Complete Switch Mode Power Supply

　　• 12A DC Output Current

　　• Adjustable +0.6V to +4V Output Range

　　• Up to 90% Efficiency

　　• Digital Control PWM

　　• Fixed 615kHz Switching Frequency

　　• Fast Transient Response

　　• Enable Function Option

　　• Power-Good Indicator

　　• Convenient Power Connection

　　• Multiple Power Options

　　• Single Supply Operation

　　• Configurable Through SMBus

　　Key Specifications

　　The ZL9101EVAL1Z has been designed and optimized for the following parameters:

　　• VIN = 12V

　　• VOUT = 1.2V

　　• IOUT(MAX) = 15A

　　• FSW = 615kHz

　　• VOUT(RIPPLE) < 1%

　　• Transient Response = 3% (3A to 9A step at 2.5V/μs)