TMUX7462F datasheet(20/37 Pages) TI

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7.3 Input and Output Leakage Current under Overvoltage Fault

If any of the source pin voltage goes above the fault supplies (VFP or VFN) by one threshold voltage (VT),

the TMUX7462F's overvoltage protection feature is triggered to turn off the switch under fault, keeping the

fault channel in the high-impedance state. IS(FA) and ID(FA) denotes the input and output leakage current under

overvoltage fault conditions, respectively. The supply (or supplies) can either be in normal operating condition

(Figure 7-3) or abnormal operating condition (Figure 7-4) when the overvoltage fault occurs. The supply (or

supplies) can either be unpowered (VDD= VSS = VFN = VFP = 0 V), floating (VDD= VSS = VFN = VFP = No

Connection), or at any level that is below the undervoltage (UV) threshold during abnormal operating conditions.

Is (FA)

GND

IS(FA) / ID(FA)

Is (FA)

GND

ID (FA)

( |VS| > |VFP + VT| or |VFN - VT| , DR = Floating or VDD)

VDD

VSS

VFP VFN

GND

Figure 7-3. Measurement Setup for Input and Output Leakage Current Under Overvoltage Fault with

Normal Supplies

Is (FA)

VDD

VSS

GND

Is (FA)

GND

ID (FA)

GND

ID (FA)

GND

Is (FA)

GND

Is (FA)

GND

ID (FA)

GND

ID (FA)

Unpowered

(VDD = VSS = VFN = VFP = 0 V)

N.C.

VFP VFN

VDD

VSS

VFP

Floating

(VDD = VSS = VFN = VFP = N.C.)

VFN

Figure 7-4. Measurement Setup for Input and Output Leakage Current Under Overvoltage Fault with

Unpowered or Floating Supplies

TMUX7462F

SCDS394A – MARCH 2021 – REVISED OCTOBER 2021

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