Skyworks AAT2688

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-ona- chip power solution for consumer communications requipment.

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 modecontrol 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.

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

Typical applications

• Wireless LAN Systems
• Notebook Computers
• DSL and Cable Modems
• Satellite Set-top Boxes

More information

• Datasheet
• IC product information