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BD9A600MUV 6A同步降壓轉換器解決方案

文章來源：更新時間：2015/6/2 9:12:00

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ROHM公司的BD9A600MUV是2.7V-5.5V輸入輸出6A的集成低導通電阻MOSFET同步降壓DC/DC轉換器,采用簡單輕負載模式(SLIMTM)控制,輸出電壓從0.8V 到VPVIN x 0.7V,開關頻率1MHz,主要用在DSP,FPGA,微處理器等電源,平板電腦/服務器電源,LCDTV,打印機,OA設備和娛樂設備等.本文介紹了BD9A600MUV主要特性,框圖,應用電路及其推薦元件數值,降壓DC/DC轉換器BD9A600MUV評估板電路圖,材料清單和PCB設計文件圖.
BD9A600MUV is a synchronous buck switchingregulator with built-in low on-resistance power MOSFETs.It is capable of providing current up to 6A.The SLLMTMcontrol provides excellent efficiency characteristics inlight-load conditions which make the product ideal forequipment and devices that demand minimal standbypower consumption. The oscillating frequency is high at1MHz using a small value of inductance. It is a currentmode control DC/DC converter and features high-speedtransient response. Phase compensation can also be seteasily.

BD9A600MUV主要特性:
 Synchronous Single DC/DC Converter.
 SLLMTM (Simple Light Load Mode)Control.
 Over Current Protection.
 Short Circuit Protection.
 Thermal Shutdown Protection.
 Under Voltage Lockout Protection.
 Adjustable Soft start Function.
 Power Good Output.
 VQFN016V3030 Package(Backside HeatDissipation)

BD9A600MUV主要指標:
 Input Voltage Range：2.7V to 5.5V
 Output Voltage Range：0.8V to VPVIN x 0.7V
 Average Output Current：6A(Max)
 Switching Frequency：1MHz(Typ)
 High-Side MOSFET On-Resistance：25mΩ(Typ)
 Low-Side MOSFET On-Resistance：25mΩ(Typ)
 Standby Current：0μA(Typ)

BD9A600MUV應用:
 Step-down Power Supply for DSPs,FPGAs, Microprocessors, etc.
 Laptop PCs/ Tablet PCs/ Servers.
 LCD TVs.
 Storage Devices (HDDs/SSDs).
 Printers, OA Equipment.
 Entertainment Devices.
 Distributed Power Supply, Secondary PowerSupply.

圖1.BD9A600MUV框圖

圖2.BD9A600MUV典型應用電路圖
推薦元件數值(VIN = 5V):

推薦元件數值(VIN = 3.3V):

降壓DC/DC轉換器BD9A600MUV評估板

This evaluation board has been developed for ROHM’s synchronous buck DC/DC converter customers evaluatingBD9A600MUV. While accepting a power supply of 2.7-5.5V, an output of 1.8V can be produced. The IC has internal 25mΩhigh-side N-channel MOSFET and 25mΩ low-side N-channel MOSFET and a synchronization frequency is of 1MHz. ASoft Start circuit prevents in-rush current during startup. An EN pin allows for simple ON/OFF control of the IC to reducestandby current consumption. A MODE pin allows the user to select fixed frequency PWM mode or enables the Deep-SLLMcontrol and the mode is automatically switched between the Deep-SLLM control and fixed frequency PWM mode. IncludeOCP (Over Current Protection) and SCP (Short Circuit Protection).