3 Product Description

The TPS3704x is a family of quad, triple, dual, and single precision voltage supervisors where each channel has overvoltage and undervoltage detection capability. The TPS3704x features a highly accurate window threshold voltage where the upper and lower thresholds can be customized for symmetric or asymmetric tolerances. The reset signal for the TPS3704x is asserted, with a fault detection time delay (t_PD = 10 μs maximum), when the sense voltage is outside of the overvoltage and undervoltage thresholds.

The TPS3704x includes the resistors used to set the overvoltage and undervoltage thresholds internal to the device. These internal resistors allow for lower component counts and greatly simplifies the design because no additional margins are needed to account for the accuracy of external resistors. The level of integration in the TPS3704x enables a total small solution size for any application.

The TPS3704x is capable to monitor any voltage rail with high resolution (V_IT ≤ 0.8 V: 20 mV steps /
V_IT > 0.8 V: 0.5% or 20 mV steps whichever is lower). Each channel in the TPS3704x can be configured independently as a window, OV or UV supervisor. Also, the V_IT threshold voltage for each channel can be asymmetric. For example, a channel that is configured as an overvoltage supervisor can be setup with a +5% tolerance whereas an undervoltage channel supervisor can be programmed with a -4% tolerance. If a window supervisor is configured, the voltage threshold tolerance can either be symmetrical or asymmetrical.

The TPS3704x includes fixed reset time delay (t_D) options ranging from 20 μs to 1200 ms and can monitor up to four channels while maintaining an ultra-low I_Q current of 15 μA (maximum).