MIC2156中文资料PWM Controllers – Buck Products数据手册Microchip规格书

描述 Description

The MIC2155 and MIC2156 are a family of 2-phase, single output synchronous buck control ICs featuring small size, high efficiency, and a high level of flexibility. The ICs implement a 500kHz (MIC2155) and 300kHz (MIC2156) voltage mode PWM control, with the outputs switching 180° out of phase. The result of the out-of-phase operation is 1MHz (or 600kHz) input ripple with ripple current cancellation, minimizing the required input filter capacitance. A 1% output voltage tolerance allows the maximum level of system performance. Internal drivers with adaptive gate drive allow the highest efficiency with the minimum external components.
Two independent enable pins and a power good output are provided, allowing a high level of control and sequencing capability.
The MIC215x family has a junction operating range from -40°C to +125°C.

特性 Features

·Synchronous Buck Control ICs with outputs switching 180° out-of-phase
·Remote sensing with internal differential amplifier
·4.5V to 14.5V input voltage range
·Adjustable output voltages down to 0.7V
·1% output voltage accuracy
·Starts up into a pre-biased output
·500kHz PWM operation (MIC2155)
·300kHz PWM operation (MIC2156)
·Adaptive gate drive allows efficiencies over 95%
·Adjustable current limit with no sense resistor
·Senses low-side MOSFET current

简介

MIC2156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MIC2156DC-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。