SNVSBC9B November 2019 – August 2020 TPSM53604
The TPSM53604 implements internal UVLO circuitry on the VIN pin. The device is disabled when the VIN pin voltage falls below the internal VIN UVLO threshold. The internal VIN UVLO rising threshold is 3.55 V (typical) with a typical hysteresis of 500 mV.
If an application requires a higher UVLO threshold, a resistor divider can be placed between VIN, the EN pin, and AGND as shown in Figure 7-5. The enable rising threshold (VEN-H) is 1.23 V (typ) with 100 mV (typ) hysteresis. Table 7-4 lists recommended resistor values for RENT and RENB to adjust the ULVO voltage.
To ensure proper start-up and reduce input current surges, TI recommends setting the UVLO threshold to approximately 80% to 85% of the minimum expected input voltage.
|VIN UVLO (V)||6.5||10||15||20||25||30|