Texas Instruments TPS3808E/TPS3808E-Q1 Current Supervisors
Texas Instruments TPS3808E/TPS3808E-Q1 Low-Quiescent Current Supervisors are part of a family of microprocessor supervisory circuits that monitor system voltages from 0.4V to 5V. These devices also assert 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 TPS3808E/TPS3808E-Q1 devices use a precision reference to achieve 0.5% threshold accuracy. 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 user-adjusted between 1.25ms and 10s by connecting the CT pin to an external capacitor. The TPS3808E/TPS3808E-Q1 device has a very low typical quiescent current of 0.6µA and is designed for battery-powered applications. The TPS3808E/TPS3808E-Q1 are available in the SOT-23-6 package and are fully specified over a temperature range of -40°C to 125°C (TJ). The TPS3808E-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Power-on reset generator with an adjustable delay time of 1.25ms to 10s
- 0.6µA typical very low quiescent current
- Fixed threshold voltages for standard voltage rails from 0.9V to 5V and adjustable voltage down to 0.405V are available
- 1% typical high threshold accuracy
- Manual reset (MR) input
- Open-drain RESET output
- –40°C to 125°C temperature range
- Small SOT-23-6 package
Applications
- Rack server motherboard
- Electricity meter
- DC-input BLDC motor drive
- AC drive power stage module
- Surgical equipment
- Single board computer
Functional Block Diagram
Development Tool
Texas Instruments TPS3808G01Q1EVM Evaluation Module (EVM)
Designed to evaluate the TPS3808G01-Q1, a microprocessor voltage supervisor.