LX7180A中文资料4A Step-Down Regulator数据手册Microchip规格书

描述 Description

The LX7180A is a 4A step-down regulator with integrated MOSFETs packaged in a space saving QFN12 2 mm x 2 mm for today’s mobile devices. It uses an ultra-fast, constant frequency hysteretic control method to minimize external filter components while maintaining excellent regulation. The LX7180A reference voltage is programmable from 0.6 V to 1.195 V through a high speed (up to 3.4 MHz), bi-directional I2C bus. The LX7180 operates from 3 V to 5.5 V rails and outputs 0.6 V to 100% of the input voltage. Cycle-by-cycle current limiting protects against overcurrent conditions. Hiccup mode provides protection for heavy over-load or short-circuit faults. Thermal protection shuts down the regulator under overtemperature conditions. Over voltage conditions will immediately shut off the output to protect against permanent damage. The LX7180A automatically restarts when all fault conditions are cleared.

特性 Features

0-4 A Step-down Regulator
Operational Input Supply Voltage Range: 3.0 V - 5.5 V (short durations to 6.5 V)
Hysteretic Control Offers Best Transient Response
PWM Switching at a Constant 1.65 MHz
Power Save Mode (PSM) can be Selected to Improve Light Load Efficiency
100% Duty Ratio Operation
Input Under Voltage and Over Voltage Protection
Enable and Power Good Function
I2C Serial Interface at 3.4 Mbps
Internal Soft-start
Cycle-by-Cycle Over Current Protection
Hiccup Mode Protects Against Short Circuit Faults
Seven Bit Adjustable Reference Voltage via I2C Bus
RoHS Compliant

简介

LX7180A属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的LX7180A稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。