SBVS320C November 2017 – March 2024 TLV755P
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The enable pin (EN) is active high. Enable the device by forcing the EN pin to exceed VHI. Turn off the device by forcing the EN pin below VLO. If shutdown capability is not required, connect EN to IN.
The device has an internal pulldown that connects a 120Ω resistor to ground when the device is disabled. The discharge time after disabling depends on the output capacitance (COUT) and the load resistance (RL) in parallel with the 120Ω pulldown resistor. Equation 1 calculates the time constant τ:
The EN pin is independent of the input pin (IN), but if the EN pin is driven to a higher voltage than VIN, the current into the EN pin increases. This effect is illustrated in Figure 5-23. When the EN voltage is higher than the input voltage there is an increased current flow into the EN pin. If this increased flow causes problems in the application, sequence the EN pin after VIN is high, or to tie EN to VIN to prevent this flow increase from happening. If EN is driven to a higher voltage than VIN, limit the frequency on EN to below 10 kHz.