AAT2687数据手册集成电路（IC）的线性稳压器控制器规格书PDF

描述 Description

The AAT2687 provides two independently regulated DC outputs; consisting of a high voltage step-down regulator and a low input voltage low dropout (LDO) regulator. The PMIC is optimized for low-cost 12V adapter inputs, making the device the ideal system-on-a-chip power solution for consumer communications equipment.Channel 1 is a step-down regulator with an input voltage range 6.0 to 24V, providing up to 4.5A output current. 490kHz fixed switching frequency allows small L/C filtering components. Channel 1 utilizes voltage mode control configured for optimum performance across the entire output voltage and load range.Channel 2 is a low-dropout (LDO) regulator providing up to 600mA output current. The device provides extremely low output noise, low quiescent current and excellent transient response.The controller includes integrated cycle-by-cycle overcurrent protection, soft-start and over-temperature disable features. Independent input and enable pins provide maximum design flexibility.The AAT2687 is available in the Pb-free, 4x5mm 24-pin TQFN package. The rated operating temperature range is -40°C to 85°C.

特性 Features

·2-Output Step-Down Converters:
·Channel 1 Step-Down: VIN1 = 6V to 24V
·VOUT1 Adjustable from 1.5V to 5.5V
·IOUT1 up to 4.5A
·High Switching Frequency
·Voltage Mode Control
·PWM Fixed Frequency for Low-Ripple
·Channel 2 (LDO): VIN2 = 2.7V to 5.5V
·IOUT2 up to 600mA
·1V Dropout Voltage at 600mA
·High Accuracy ±1.5%
·Small Solution Size
·System On a Chip
·Ultra-small External L/C
·Shutdown Current <35μA
·Independent Enable Pins
·Programmable Over-Current Protection
·Over-Temperature Protection
·Internal Soft Start
·4x5mm 24-Pin TQFN Low Profile Thermally Enhanced Package
·-40°C to 85°C Temperature Range

简介

AAT2687属于集成电路（IC）的线性稳压器控制器。由制造生产的AAT2687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。