TPS389C03-Q1 Multichannel Overvoltage and Undervoltage I²C Programmable Voltage Supervisor and Monitor with Q&A Watchdog

1 Features

ASIL-D functional safety-compliant
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL D
- Hardware capability up to ASIL D
AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to +125°C
- Device HBM ESD classification level 2
- Device CDM ESD classification level C7B
Q&A Watchdog to monitor SoC software operation
- Programmable OPEN/CLOSE watchdog timing through I²C (1ms to 864ms)
- Start-up delay for SoC boot up initialization (2ms to 3.46s)
- Programmable maximum violation count (up to 7) before WDO assertion
- Watchdog disable pin (WDE)
Monitor state-of-the art SOCs
- Three channels with three remote sense (TPS389C03-Q1)
- Input voltage range: 2.6V to 5.5V
- Undervoltage lockout (UVLO): 2.6V
- High threshold accuracy:
- ± 5mV (–40°C to +125°C)
- Built-in ADC for voltage readouts
- Fixed window threshold levels
  - 5mV steps from 0.2V to 1.475V
  - 20mV steps in other ranges
Miniature solution and minimal component cost
- 3mm × 3mm QFN package
- User adjustable voltage threshold levels via I²C
- User adjustable glitch immunity and hysteresis levels via I²C
Designed for safety applications
- Error Signal Monitoring (ESM)
  - Programmable ESM delay via I²C (1ms to 864ms)
- Cyclic Redundancy Checking (CRC)
- Packet Error Checking (PEC)
- Active-low open-drain NIRQ, NRST, and WDO outputs