TPS3808G33DBVR 3.3V Voltage Supervisor 1.6V Threshold 200ms Delay SOT-23-5 1.1-6.5V Input -40°C to +125°C

TPS3808G33DBVR 3.3V Voltage Supervisor 1.6V Threshold 200ms Delay SOT-23-5 1.1-6.5V Input -40°C to +125°C

Features

• Power-on reset generator with adjustable delay time: 1.25 ms to 10 s

• Very low quiescent current: 2.4 μA typical

• High threshold accuracy: 0.5% typical

• Fixed threshold voltages for standard voltage rails from 0.9 V to 5 V and adjustable voltage down to 0.4 V are available

• Manual reset ( MR) input

• Open-drain RESET output

• Temperature range: –40°C to 125°C

• Small SOT-23 and 2-mm × 2-mm WSON packages

Applications

• DSP or microcontroller applications

• Notebook and desktop computers

• PDAs and hand-held products

• Portable and battery-powered products

• FPGA and ASIC applications

Description

The TPS3808 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 V, 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 ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 device has a very low typical quiescent current of 2.4 μA, so it is well suited to battery-powered applications. It is available in the SOT-23 and 2-mm × 2-mm WSON packages, and is fully specified over a temperature range of 40°C to 125°C (TJ).

INFORMATION

Drawing

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