General Description

The AP1212 series are dual integrated high-side power switch with independent enable and flag functions, optimized for self-powered and bus-powered Universal Serial Bus (USB) applications. The AP1212 series support the following USB requirements: each switch channel supplies up to 500mA as required by USB downstream devices; the switch’s low on-resistance meets USB voltage drop requirements; fault current is limited to typically 1000mA, well below the UL 25VA safety requirements; and a flag output is available to indicate fault conditions to the local USB controller. Soft start eliminates the momentary voltage drop on the upstream port that may occur when the switch is enabled in bus-powered applications.

特性 Features

- Compliant to USB specifications

- Dual independent switches control

- 2.7V to 5.5V input voltage

- 500mA minimum continuous current per port

- 110mΩ typical on-resistance

- 1.25A maximum short circuit current limit

- Independent open-drain fault flag pins

- 110μ A typical on-state supply current

- 1μ A typical off-state supply current

- Output can be forced higher than input (off-state)

- Thermal shutdown

- 2.4V typical under voltage lockout (UVLO)

- 1ms turn-on (soft-start) and fast turn-off

- Enable active-high (H) or active-low (L)

- 8-pin SOP and PDIP packages

Applications

? USB hubs

? Hot plug-in power supplies

? Battery-charger circuits