TPS22954DSQR datasheet(22/51 Pages) TI2

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IN or VBIAS

EN1

EN2

IH,EN

EN1

EN2

TPS22954, TPS22953

SLVSCT5D – MARCH 2015 – REVISED SEPTEMBER 2016

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Product Folder Links: TPS22954 TPS22953

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9.3 Feature Description

9.3.1 On and Off Control (EN pin)

The EN pin controls the state of the switch. When the voltage on EN has exceeded VIH,EN the switch is enabled.

When EN goes below VIL,EN the switch is disabled.

The EN pin has a blanking time of tBLANK on the rising edge once the VIH,EN threshold has been exceeded. It also

has a de-glitch time of tDEGLITCH when the voltage has gone below VIL,EN.

The EN pin can also be configured via an external resistor divider to monitor a voltage signal for input UVLO.

See Equation 1 and Figure 53 on how to configure the EN pin for input UVLO.

where

•

VIH,EN is the rising threshold of the EN pin (see the Electrical Characteristics table)

•

VIN is the input voltage being monitored (this could be VIN, VBIAS, or an external power supply)

•

REN1, REN2 is the resistor divider values

(1)

Figure 53. Resistor Divider (EN Pin)

TPS22954DSQR Datasheet(PDF) 22 Page - Texas Instruments