US2076B

UNISONIC TECHNOLOGIES CO., LTD US2076B Preliminary DUAL USB HIGH-SIDE POWER SWITCH „ DESCRIPTION The UTC U2076B is a dual integrated high-side power switch particularly designed for self-powered and bus-powered Universal Serial Bus (USB) applications. The UTC U2076B meets the requirements of the USB. The low on-resistance of the switch satisfies USB voltage drop requirements. Fault current is limited to typically 750mA, well below the UL 25VA safety requirement. Flag outputs are available to indicate fault conditions to the local USB controller. In addition, soft start can eliminate the momentary voltage drop which is generated on the upstream port that may occur when the switch is enabled in bus-powered applications. This device has independent functions enable and flag, and an enable input is compatible with both 3.3V and 5V logic. The UTC U2076B includes protection circuits. Thermal shutdown circuit is designed to protect the device from being damaged when high-current loads exist. UVLO (Under-voltage lockout) is used to keep the device off unless there is a valid input voltage present. The UTC U2076B is used in application such as USB host and self-powered hubs, bus-powered hubs, hot plug-in power supplies and battery-charger circuits. „ FEATURES * MOSFET with Low On-Resistance: 140mΩ [email protected] per Channel * Continuous Load Current: 500mA (MIN.) per Channel * Off-State Supply Current: 1µA (TYP.) * Output can be Forced Higher than Input (Off-State) * Current Limit u...