100

10

1

0

5

10

15

20

30

35

45

25

Overdrive (%V

50

40

RESET OCCURS

ABOVE THE CURVE

Overdrive

Voltage

Transient

Duration

TPS3808G01-Q1, TPS3808G12-Q1, TPS3808G125-Q1, TPS3808G15-Q1

TPS3808G18-Q1, TPS3808G30-Q1, TPS3808G33-Q1, TPS3808G50-Q1

www.ti.com

SBVS085I – JANUARY 2007 – REVISED JUNE 2015

8.3 Feature Description

8.3.1 Immunity to SENSE Pin Voltage Transients

The TPS3808Gxx-Q1 is relatively immune to short negative transients on the SENSE pin. Sensitivity to

transients is dependent on threshold overdrive, as shown in the Maximum Transient Duration at Sense vs Sense

voltage that lies above the curve results in RESET being asserted low. Any transient that lies below the curve is

ignored by the device.

Figure 8. Threshold Overdrive Voltage

Figure 9. Maximum Transient Duration at Sense vs Sense Threshold Overdrive Voltage

8.3.2 SENSE Input

The SENSE input provides a terminal at which any system voltage can be monitored. If the voltage on this pin

assertions and deassertions. It is good analog design practice to put a 1-nF to 10-nF bypass capacitor on the

SENSE input to reduce sensitivity to transients and layout parasitics.

Copyright © 2007–2015, Texas Instruments Incorporated

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Product Folder Links: TPS3808G01-Q1 TPS3808G12-Q1 TPS3808G125-Q1 TPS3808G15-Q1 TPS3808G18-Q1

TPS3808G30-Q1 TPS3808G33-Q1 TPS3808G50-Q1