SNVSBA1B April 2019 – April 2020 TPS3840-Q1
PRODUCTION DATA.
This design requires voltage supervision on two separate rails: 3.3-V and 1.8-V rails. The voltage rail needs to sequence upon power up with the 3.3-V rail coming up first followed by the 1.8-V rail at least 25 ms after.
PARAMETER | DESIGN REQUIREMENT | DESIGN RESULT |
---|---|---|
Two Rail Voltage Supervision | Monitor 3.3-V and 1.8-V rails | Two TPS3840-Q1 devices provide voltage monitoring with 1% accuracy with device options available in 0.1 V variations |
Voltage Rail Sequencing | Power up the 3.3-V rail first followed by 1.8-V rail 25 ms after | The CT capacitor on TPS38240PL28 is set to 0.047 µF for a reset time delay of 29 ms typical |
Output logic voltage | 3.3-V Open-Drain | 3.3-V Open-Drain |
Maximum device current consumption | 1 µA | Each TPS3840-Q1 requires 350 nA typical |