Texas Instruments TPS3842/TPS3842-Q1 Undervoltage Supervisors
Texas Instruments TPS3842/TPS3842-Q1 Undervoltage Supervisors offer 1.5% accuracy, fast detection time, and 850nA supply current. The 42V input voltage supervisors directly connect to a 12V battery to continuously monitor undervoltage (UV) conditions.
The TI TPS3842/TPS3842-Q1 utilizes a small DRL package for size-constrained applications. The built-in Hysteresis on the SENSE pin prevents false reset signals when monitoring a supply voltage rail. 1%, 5%, and 10% Hysteresis voltage options deliver design flexibility to support voltage transients.
SENSE is decoupled from VDD and can monitor higher and lower voltages than VDD. Fixed threshold variants provide accurate low IQ voltage monitoring. Adjustable threshold variants allow an adaptable undervoltage threshold setting with external resistors. The TPS3842/TPS3842-Q1 enables capacitor programmable de-glitch on the SENSE with the CTS pin and capacitor programmable reset delay timing with the CTR pin.
The TPS3842-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- AEC-Q100 qualified for automotive applications
- Device temperature grade 1 of -40°C to +125°C ambient operating temperature
- Device HBM ESD classification level 2
- Device CDM ESD classification level C7B
- 1.9V to 42V wide supply voltage range
- VDD, SENSE, and RESET are rated to 42V
- 850nA (typical) very low quiescent current
- High threshold accuracy of 0.5% (typical)
- 2.7V to 9.5V fixed internal threshold voltages
- 0.7V Adjustable voltage variant
- Capacitor programmable adjustable delay time with CTR pin
- Capacitor programmable de-glitch time with CTS pin
- Open-drain, active-low output
- -40°C to +125°C temperature range
- Small size in a SOT5X3 (DRL) package
Applications
- ADAS domain controller
- Automotive gateway
- Automotive head unit
- Digital cockpit processing unit
- Telematics control unit
- Driver monitoring
Typical Application Circuit
Supply Voltage vs Supply Current
Functional Block Diagram
Associated Evaluation Module
Texas Instruments TPS3842EVM Supervisor Evaluation Module (EVM)
Provides a sample design and test point for all input and output pins of the TPS3842 and TPS3842-Q1.