PM6675S集成电路（IC）的线性稳压器控制器规格书PDF中文资料

PM6675S属于集成电路（IC）的线性稳压器控制器。由意法半导体集团制造生产的PM6675S稳压器 - 线性 + 开关此产品族中的产品用于构建执行 DC-DC 转换或电压调节功能的电路，采用的是开关模式和线性稳压器功能的组合。虽然具体的拓扑各不相同，但此类产品的主要目的是将开关模式技术的效率优势与线性稳压技术的低噪声特性结合在一起。

描述 Description

The PM6675S device consists of a single high efficiency step-down controller and an independent Low Drop-Out (LDO) linear regulator.

The Constant On-Time (COT) architecture assures fast transient response supporting both electrolytic and ceramic output capacitors. An embedded integrator control loop compensates the DC voltage error due to the output ripple.

A selectable low-consumption mode allows the highest efficiency over a wide range of load conditions. The low-noise mode sets the minimum switching frequency to 33 kHz for audio-sensitive applications.

The LDO linear regulator can sink and source up to 2 Apk. Two fixed current limits (±1 A-±2 A) can be chosen.

An active soft-end is independently performed on both the switching and the linear regulators outputs when disabled.

特性 Features

■ Switching section

– 4.5 V to 28 V input voltage range

– 0.6 V, ±1 voltage reference

– Selectable 1.5 V fixed output voltage

– Adjustable 0.6 V to 3.3 V output voltage

– 1.237 V ±1 reference voltage available

– Very fast load transient response using constant on-time control loop

– No RSENSE current sensing using low side MOSFETs RDS(ON)

– Negative current limit

– Latched OVP and UVP

– Soft-start internally fixed at 3 ms

– Selectable pulse skipping at light load

– Selectable No-Audible (33 kHz) pulse skip mode

– Ceramic output capacitors supported

– Output voltage ripple compensation

– Output soft-end

■ LDO regulator section

– Adjustable 0.6 V to 3.3 V output voltage

– Selectable ±1 Apk or ±2 Apk current limit

– Dedicated power-good signal

– Ceramic output capacitors supported

– Output soft-end

Applications

■ Notebook computers

■ Graphic cards

■ Embedded computers