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说明

MIC28517/16是一款宽输入范围（4.5V-70V）集成FET，8A开关稳压器。MIC28517/16利用了最新的增强型高压COT控制器，该控制器与一对具有改进雪崩额定值的低FOM功率沟槽N沟道FETS共同封装。输出电压可调至0.6V，精度为+/-1%。MIC28517提供“模式”选择引脚，允许用户在超轻负载和超高速控制操作之间进行选择。Hyper Speed Control专有架构可实现超快速瞬态响应，同时降低输出电容。MIC28516提供了外部“软启动”功能的选项，取代了“模式”选择引脚，允许用户使用外部电容器灵活调整软启动。MIC28517/16提供全套保护功能，确保设备在故障条件下安全运行。其中包括UVLO、减少电流涌入的外部软启动、打嗝电流限制短路保护和热关机。    
 
MCP28517/16有38引脚6mm x 6mm PQFN，结操作范围从-40°C到+125°C。

特性

• •Input voltage range: 4.5V to 70V
• •Adjustable output from 0.6V to 32V (Limited by duty cycle)
• •High Current capability of 8A
• •Adaptive Constant On Time Control
• •0.6V Internal reference
• •Adjustable 270 KHZ to 800KHZ switching Frequency
• •High Voltage Internal LDO for single supply operation
• •Operation with both internal and external VDD
• •Output current up to 8A
• •Supports start up to pre-bias output
• •Internal compensator for tight output regulation
• •Enable function for low stand-by current
• •External programmable soft start to reduce inrush (MIC28516 Only)
• •MODE select pin to enable light load operation (MIC28517 Only)
• •Programmable current limit and hiccup short circuit protection
• •Thermal shut down with hysteresis
• •CCM only operation for reduced noise at low output current (MIC28516 Only)
• •High performance low profile lead frame based package
• •Next generation Power Trench MOSFETS for clean switching and reduced ringing
• •Compact size – 6 X 6 mm PQFN
• •–40°C to +125°C junction temperature range

参数