PS37044AJOFDDFR datasheet(23/34 Pages) TI

23 / 34 page

9.2.2 Application Curves

These application curves were taken with the TPS3704Q1EVM. Please see the TPS3704Q1EVM User Guide for

more information.

VDD

SENSE1

RESET1

D = 20.4 ms

VSENSE1 start up 0 V to 3.3 V, VDD = 3.3 V, VRESET1 = 3.3 V,

TPS37044A7OHDDFR

Figure 9-4. TPS37044 SENSE1 Start Up Function

Reset Delay (tD) = 21.2 ms

VDD

RESET1

RESET2

VDD start up 0 V to 3.3 V, VSENSE1 = 3.3 V, VSENSE2 = 1.8 V,

VSENSE3_4 = 1.15 V, VRESET1_2 = 3.3 V, TPS37044A7OHDDFR

Figure 9-5. TPS37044 VDD Start Up Function

VDD

SENSE1

RESET1

VIT-(UV)

3.02 V

VIT+(OV)

3.57 V

VSENSE1 ramp 0 V to 3.75 V, OV/UV Threshold = 3.3 V

(±8%), VSENSE2 = 1.8 V, VDD = 3.3 V, VRESET1 = 3.3 V,

TPS37044A7OHDDFR

Figure 9-6. TPS37044 Overvoltage and

Undervoltage Function

VDD

SENSE2

RESET1

VIT+(OV)

1.82 V

VIT-(UV)

1.70 V

VSENSE2 ramp 0 V to 2 V, OV/UV Threshold = 1.8 V

(+4%, -3.5%), VSENSE1 = 3.3 V, VDD = 3.3 V,

VRESET1 = 3.3 V, TPS37044A7OHDDFR

Figure 9-7. TPS37044 Overvoltage and

Undervoltage Function

VDD

SENSE3 = SENSE4

VIT-(UV)

RESET2

VIT+(OV)

1.22 V

1.05 V

VSENSE3_4 ramp 0 V to 1.5 V, OV/UV Threshold = 1.15

V (+7.5%, -5.5%), VDD = 3.3 V, VRESET2 = 3.3 V,

TPS37044A7OHDDFR

Figure 9-8. TPS37044 Overvoltage and

Undervoltage Function

SENSE3 = SENSE4

VDD

RESET2

VDD ramp 0 V to 5 V, VSENSE3_4 = 1.2 V, VRESET2 = 3.3 V,

TPS37044A7OHDDFR

Figure 9-9. TPS37044 VDD Ramp Up Function

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TPS3704

SNVSBZ2B – MARCH 2021 – REVISED DECEMBER 2021

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