Voltage supervisors help extend battery life

The devices provide a combination of minimal power consumption, high accuracy, and low propagation delay to help extend battery life for a variety of low power, industrial and battery-powered applications.

The voltage supervisors deliver a broad input voltage of 1.5V to 10V, which enables the monitoring of 9V rails or batteries with no external components as well as 24V rails with external resistors.

Nano-quiescent current (nano-Iq) of 350nA (typical) increases battery life for low-power applications and reduces current consumption when utilising those external resistors.

With less than a 1µA current consumption, the ICs can be configured to work as either a comparator (with a simple three-pin configuration) or as a daisy-chained universal power supply supervisor that acts as a sequencer.

Fast start-up delay allows the detection of a voltage fault before the rest of the system powers up, providing maximum safety in hazardous start-up fault conditions, and the low power-on-reset (V_POR) prevents false resets, premature enable or turn-on of next device, and proper transistor control during power-up and power-down.

Additional features include a 1% typical monitor threshold accuracy, built-in glitch immunity protection for manual reset and V_DD, built-in hysteresis, and low open-drain output leakage current.

The voltage supervisors are available in a five-pin, industry-standard SOT-23 package, with three output topology options: open-drain, active-low (TPS3840DL); push-pull, active-low (TPS3840PL); and push-pull, active-high (TPS3840PH).

Target power management applications include grid infrastructure equipment, such as circuit breakers, smart meters, and other monitoring and protection equipment; factory and building automation; electronic point of sale devices; and portable and battery-powered systems.