ZHCSG01C February 2017 – August 2018 DRV8320 , DRV8320R , DRV8323 , DRV8323R
PRODUCTION DATA.
The nSHDN pin of the LMR16006 device is an input that is tolerant of high voltages with an internal pullup circuit. The device can be enabled even if the nSHDN pin is floating. The regulator can also be turned on using 1.23-V or higher logic signals. If the use of a higher voltage is desired because of system or other constraints, a 100-kΩ or larger value resistor is recommended between the applied voltage and the nSHDN pin to help protect the device. When the nSHDN pin is pulled down to 0 V, the device turns off and goes to the lowest shutdown current mode. In shutdown mode the supply current decreases to approximately 1 µA. If the shutdown function is unused, the nSHDN pin can be tied to the VIN pin with a 100-kΩ resistor. The maximum voltage to the nSHDN pin should not exceed 60 V. The LMR16006 device has an internal UVLO circuit to shut down the output if the input voltage falls lower than an UVLO threshold level that is internally fixed. Shutting down the output in this way makes sure the regulator is not latched into an unknown state during low input voltage conditions. The regulator powers up when the input voltage exceeds the voltage level. If the UVLO voltage must be higher, use the nSHDN pin to adjust the system UVLO by using external resistors.