Microchip MCP16301效率96%降压电源解决方案
发布时间：2011-6-7 11:31
发布者：Liming
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Microchip公司的MCP16301是高度集成高效固定频率(500kHz)的降压DC/DC转换器,其效率高达96%,输入电压4-30V,输出电压2.0V-15V,输出电压精度2%,输出电流600mA,集成了460毫欧姆的N沟MOSFET降压开关,主要用在PIC/dsPIC MCU偏压电源,24V工业输入DC/DC转换器,STB,DSL有线调制解调器,汽车电子,AC/DC数控电源,消费类电子,医疗和保健,分布电源等.本文介绍了MCP16301主要特性, 方框图,多种典型应用电路图和相应的材料清单, MCP16301高压降压转换器600mA演示板主要特性,电路图和材料清单. The MCP16301 is a highly integrated, high-efficiency, fixed frequency, step-down DC-DC converter in a popular 6-pin SOT-23 package that operates from input voltage sources up to 30V. Integrated features include a high side switch, fixed frequency Peak Current Mode Control, internal compensation, peak current limit and overtemperature protection. Minimal external components are necessary to develop a complete step-down DC-DC converter power supply. High converter efficiency is achieved by integrating the current limited, low resistance, high-speed N-Channel MOSFET and associated drive circuitry. High switching frequency minimizes the size of external filtering components resulting in a small solution size. The MCP16301 can supply 600 mA of continuous current while regulating the output voltage from 2.0V to 15V. An integrated, high-performance peak current mode architecture keeps the output voltage tightly regulated, even during input voltage steps and output current transient conditions that are common in power systems. The EN input is used to turn the device on and off. While turned off, only a few micro amps of current are consumed from the input for power shedding and load distribution applications. Output voltage is set with an external resistor divider. The MCP16301 is offered in a space saving SOT-23-6 surface mount package. MCP16301主要特性: •Up to 96% Typical Efficiency •Input Voltage Range: 4.0V to 30V •Output Voltage Range: 2.0V to 15V •2% Output Voltage Accuracy •Integrated N-Channel Buck Switch: 460 mΩ •600 mA Output Current •500 kHz Fixed Frequency •Adjustable Output Voltage •Low Device Shutdown Current •  eak Current Mode Control•Internal Compensation •Stable with Ceramic Capacitors •Internal Soft-Start •Cycle by Cycle Peak Current Limit •Under Voltage Lockout (UVLO): 3.5V •Overtemperature Protection •Available Package: SOT-23-6 MCP16301应用: • IC®/dsPIC Microcontroller Bias Supply•24V Industrial Input DC-DC Conversion •Set-Top Boxes •DSL Cable Modems •Automotive •Wall Cube Regulation •SLA Battery Powered Devices •AC-DC Digital Control Power Source • ower Meters•D2 Package Linear Regulator Replacement •Consumer •Medical and Health Care •Distributed Power Supplies 
图1.MCP16301方框图 
图2.MCP16301典型应用电路图:30V输入,输出3.3V 
图3.MCP16301典型应用电路图:15-30V输入,输出12V 
图4.MCP16301典型应用电路图:10-16V输入,输出2.5V 
图5.MCP16301典型应用电路图:4-30V输入,输出3.3V/150mA MCP16301高压降压转换器600mA演示板 MCP16301 High Input Voltage 600 mA Output Demo Board The MCP16301 600 mA Demo Board is developed to demonstrate how the MCP16301 device operates over a wide input voltage and load range. Test points are provided for input and output, allowing the demo board to be connected directly to a system. A copper via connected to the EN input can be used to turn the MCP16301 on and off– turning the device on (EN > 1.4V) when the undervoltage lockout threshold is met(VIN > 3.5V), will enable the device. MCP16301高压降压转换器600mA演示板主要特性: • Output Voltage set to 3.3V • 600 mA Output Current • Input Voltage Range 4V to 30V with 40V Transients • EN Input Test Point 
图6.MCP16301高压降压转换器600mA演示板电路图 MCP16301高压降压转换器600mA演示板材料清单: 
图7.MCP16301高压降压转换器600mA演示板外形图 详情请见: http://ww1.microchip.com/downloads/en/DeviceDoc/25004A.pdf 和 http://ww1.microchip.com/downloads/en/DeviceDoc/51978a.pdf |
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