AAT2689数据手册Skyworks中文资料规格书

描述 Description

The AAT2689 provides two independently regulated DC outputs, consisting of a high voltage step-down (Buck) 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 (Buck) regulator with an input voltage range of 6V to 24V providing up to 2500mA 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 AAT2689 is available in the Pb-free 3x4mm 16-pin TDFN package. The rated operating temperature range is -40°C to 85°C.

特性 Features

·2-Output Step-Down Converters:
·Channel 1 (Buck): VIN1 = 6V to 24V
·VOUT1 adjustable from 1.5V to 5.5V
·IOUT1 up to 2.5A
·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
·Adjustable Over-Current Protection
·Over-Temperature Protection
·Internal Soft Start
·3x4mm 16-Pin TDFN Low Profile Thermally Enhanced Package
·-40°C to 85°C Temperature Range