Step-Up Converter for Handheld Applications

Active: In Production.

The MAX8969 is a simple 1A step-up converter in a small package that can be used in any single-cell Li-ion application. This IC provides protection features such as input undervoltage lockout, short circuit, and overtemperature shutdown.

The IC transitions to skip mode seamlessly under light-load conditions to improve efficiency. Under these conditions, switching occurs only as needed, reducing switching frequency and supply current to maintain high efficiency.

When the input voltage is sufficient to drive the load, the IC can be operated in track mode or automatic track mode (ATM). In track mode, the p-channel MOSFET acts as a current-limited load switch and quiescent current is as low as 30µA under a no-load condition. In ATM mode, the p-channel MOSFET acts as a current-limited load switch and quiescent current is as low as 60µA under a no-load condition. In ATM mode, the internal boost circuitry is enabled allowing for fast transitions into boost mode.

The IC is available in a small, 1.25mm x 1.25mm, 9-bump WLP (0.4mm pitch) package.

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