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Over-voltage protection switch protects battery-operated devices

Santa Clara, Calif.—Advanced Analogic Technologies Inc. (AnalogicTech) is offering the first in a family of over-voltage protection (OVP) devices for portable applications.

The AAT4684 switch protects low-voltage systems against high-voltage spikes up to 28V from a power line surge or using the wrong charger while offering a low RDS(ON) of 100 milliohms typical at 4.5V.

The OVP protection IC uses a P-channel MOSFET power switch to break the connection between the charger adapter and the battery charger when the input voltage exceeds a preset level. Designers can use the device with either an internally programmed over-voltage trip point or an adjustable protection threshold programmed by two external resistors. OVP response is 1-µs maximum.

The AAT4684 features an under-voltage lockout (UVLO) protection circuit which places the device into sleep mode at input voltages consuming < 1 µA. Quiescent current for the AAT4684 is 30-µA typical.

Availability: Qualified across the -40°C to +85°C temperature range, the AAT4684 is available in a Pb-free, 12-pin TSOPJW package.
Datasheet: click here.

Advanced Analogic Technologies Inc., 1-408-737-4600, www.analogictech.com

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