DRV8305-Q1: About Wake pin.

Hi Leo,

Here is a clearer description of the WAKE pin functionality:

The sleep state can be entered by issuing a sleep command through the SLEEP bit in SPI register 0x9, bit D2 with the device in its standby state (EN_GATE = LOW). The device will not respond to a sleep command in its operating state.

The device can then only be enabled through the WAKE pin which is a high-voltage tolerant input pin. For the DRV8305 to be brough out of sleep, the WAKE pin must be at a voltage greater than 3 V. This allows the wake pin to be driven, for example, directly by the battery through a switch, through the inhibit pin (INH) on a standard LIN interface, or through standard digital logic. The WAKE pin will only react to a wake up command if PVDD > VPVDD_UVLO2. After the DRV8305 is out of SLEEP mode, all activity on the WAKE pin is ignored.

In regards to the sentence "pin cannot be used to disable LDO; Driver needs to be enabled and disabled separately", This means that EN_GATE is the driver enable and disable, and WAKE pin cannot be used like a regular sleep pin which can be found on our other devices. The WAKE pin will only remove the device from the sleep mode condition.

Thank you,

Joseph