AAT2603INJ-1-T1

The AAT2603INJ-1-T1 from Skyworks Solutions is a sophisticated power management integrated circuit designed for handheld mobile systems. It offers a comprehensive solution by providing six regulated voltages from a single-cell Lithium-ion/poly-mer battery or a 5V supply. The device integrates two high-efficiency switching step-down regulators and four low-dropout (LDO) regulators, each with independent enable pins.

The step-down regulators operate at a fixed 1.5 MHz frequency and transition to variable frequency at light loads for improved efficiency. DC-DC1 (Buck1) supports up to 1.2A with low dropout voltage, while DC-DC2 (Buck2) is a 600mA regulator with dynamic output voltage capability. The LDO regulators LDO1 and LDO2 can supply up to 400mA, with adjustable output voltages down to 1.5V. LDO3 and LDO4 provide up to 200mA with good noise and power supply rejection, and their output voltages are externally adjustable down to 1.2V.

This power management IC is available in a Pb-free, thermally enhanced 28-pin TQFN44 package. It is rated for operation over a wide temperature range of -40°C to +85°C, making it suitable for demanding portable applications. Key features include short circuit and over-current protection, as well as over-temperature protection.

Applications for the AAT2603INJ-1-T1 include handheld GPS devices, instruments, PDAs, handheld computers, portable media players, and smartphones. Its integrated nature and versatile output capabilities make it an ideal choice for compact and power-efficient designs.