SBVS441 December 2022 TPS7B4255
PRODUCTION DATA
Pulling the reference voltage below 0.7 V disables the device, and the device enters a sleep state where the device draws 3 μA (max) from the power supply. In a typical application, the reference voltage is generally sourced from another LDO voltage rail. A scenario where the device must be disabled without a shutdown of the reference voltage can occur; the device can be configured as shown in Figure 7-5 in this case. The TPS7B84-Q1 is a 150-mA LDO with ultra-low quiescent current that is used as a reference voltage to the TPS7B4255 and also as a power supply to the ADC. The operational status of the device is controlled by a microcontroller (MCU) input or output.