MIC2194中文资料14V, 400 KHz Synchronous Buck Controller with 100% Duty Cycle and Programmable UVLO数据手册Microchip规格书

描述 Description

MIC2194 is a high efficiency PWM buck control IC housed in the SO-8 package. Its 2.9V to 14V input voltage range allows it to efficiently step down voltages in 3.3V, 5V, and 12V systems as well as 1- or 2-cell Li-Ion battery powered applications. The flexible architecture of the MIC2194 allows for it to be configured as a buck or a buck-boost converter.The MIC2194 solution saves valuable board space. The device is housed in the space-saving SO-8 package, whose low pin-count minimizes external components. Its 400kHz PWM operation allows a small inductor and small output capacitors to be used. The MIC2194 can implement all-ceramic capacitor solutions.The MIC2194 drives a high-side P-Channel MOSFET. A low output driver impedance of 2ω allows the MIC2194 to drive large external MOSFETs to generate a wide range of output currents. The MIC2194 can achieve maximum duty cycles of 100%, which can be useful in low headroom applications.The MIC2194 is available in an 8-pin SOIC package with a junction temperature range of -40°C to +125°C.

特性 Features

• 2.9V to 14V input voltage range
• 400kHz oscillator frequency
• PWM current mode control
• 2? output drivers
• 100% maximum duty cycle
• 0.5µA micro-power shutdown
• Programmable UVLO
• Front edge blanking
• Cycle-by-cycle current limiting
• Frequency foldback short circuit protection
• 8-lead SOIC package

简介

MIC2194属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的MIC2194DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。