Low-quiescent current supervisor with programmable delay & manual reset | DBV | 6 | -40 to 125

The TPS3808 family of microprocessor supervisory

circuits monitors system voltages from 0.4V to 5V, asserting an open-drain

RESET signal when the SENSE voltage drops below a preset

threshold or when the manual reset (MR) pin drops to a logic

low. The RESET output remains low for the user-adjustable delay

time after the SENSE voltage and manual reset (MR) return above

the respective thresholds.

The TPS3808 device uses a precision reference to

achieve 0.5% threshold accuracy for VIT ≤ 3.3V. The reset delay time can

be set to 20ms by disconnecting the CT pin, 300ms by connecting the

CT pin to VDD using a resistor, or can be user-adjusted

from 1.25ms to 10s by connecting the CT pin to an external capacitor. The

TPS3808 device has a very low typical quiescent current of 2.4µA, so it is an

excellent choice for battery-powered applications. TPS3808 is available in the

SOT-23 and 2mm × 2mm WSON packages, and is fully specified over a temperature range

from –40°C to 125°C (TJ).