AAT2688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 AAT2688 provides two independently regulated DC outputs: a high voltage synchronous step-down (Buck) regulator and a low input voltage step-down 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 of 6.0V 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 low output noise, low quiescent current, and excellent transient response.The step-down regulator includes integrated over-current, soft-start and over-temperature protection. Independent input and enable pins provide maximum design flexibility.The AAT2688 is available in the Pb-free 4mm x 5mm 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 (Buck): VIN1 = 6.0 to 24.0V
·VOUT1 Adjustable from 0.8V to 5.5V
·IOUT1 up to 4.5A
·High Switching Frequency
·Voltage Mode Control
·High Accuracy ±1.5%
·PWM Fixed Frequency for Low Ripple
·Channel 2 (LDO): VIN2 = 2.7V to 5.5V
·IOUT2 up to 600mA
·1V Dropout Voltage at 600mA IOUT
·Small Solution Size
·System on a Chip
·Ultra-small External L/C
·Shutdown Current <35μA
·Independent Enable Pins
·Over-Current and Over-Temperature Protection
·Internal Soft Start
·4x5mm 24-Pin TQFN Low Profile Package
·-40°C to 85°C Temperature Range

简介

AAT2688属于集成电路（IC）的线性稳压器控制器。由制造生产的AAT2688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。