Built-in hysteresis to avoid erroneous output reset release. The hysteresis is opposite to the threshold voltage; for overvoltage options the hysteresis is subtracted from the positive threshold (V_ITP), for undervoltage options hysteresis is added to the negative threshold (V_ITN).

Figure 8-4 Hysteresis (Overvoltage Active-Low)

Figure 8-6 Hysteresis (Undervoltage Active-High)

Figure 8-5 Hysteresis (Overvoltage Active-High)

Figure 8-7 Hysteresis (Undervoltage Active-Low)

Table 8-1 shows a sample of hysteresis and voltage options for the TPS3760-Q1. For threshold voltages ranging from 2.7 V to 8 V, one option is to select a fixed hysteresis value ranging from 0.5 V to 2.5 V in increments of 0.5 V. Additionally, a second option can be selected where the hysteresis value is a percentage of the threshold voltage. The percentage of voltage hysteresis ranges from 2% to 13%.

Knowing the amount of hysteresis voltage, the release voltage for the undervoltage (UV) channel is
(V_{ITN (UV)} + V_HYS) and for the overvoltage (OV) channel is (V_{ITP (OV)} - V_HYS). The accuracy of the release voltage, or stated in the Electrical Characteristics as Hysteresis Accuracy is ±1.5%. Expanding what is shown in Table 8-1, below are a few voltage hysteresis examples that include the hysteresis accuracy:

Undervoltage (UV) Channel

V_ITN = 0.8 V

Voltage Hysteresis (V_HYS) = 5% = 40 mV

Hysteresis Accuracy = ±1.5% = 39.4 mV or 40.6 mV

Release Voltage = V_ITN + V_HYS = 839.4 mV to 840.6 mV

Overvoltage (OV) Channel

V_ITP = 8 V

Voltage Hysteresis (V_HYS) = 2 V

Hysteresis Accuracy = ±1.5% = 1.97 V or 2.03 V

Release Voltage = V_ITN - V_HYS = 5.97 V to 6.03 V