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8.4.4 Output (OUT)

The TLV4041 and TLV4051 feature a push-pull output stage which eliminates the need for an external pull-up

resistor while providing a low impedance output driver. Likewise, the TLV4021 and TLV4031 feature an open-

drain output stage which enables the output logic levels to be pulled-up to an external source as high as 5.5 V

independent of the supply voltage.

In a typical TLV40x1 application, OUT is connected to an enable input of a processor or a voltage regulator such

as a dc-dc converter or low-dropout regulator (LDO). The open-drain output versions (TLV4021/4031) are used

if the power supply of the comparator is different than the supply voltage of the device being controlled. In this

usage case, a pull-up resistor holds OUT high when the comparator output goes high impedance. The correct

interface-voltage level is provided (also known as level-shifting) by connecting the pull-up resistor on OUT to the

appropriate voltage rail. The TLV4021/4031 output can be pulled up to 5.5 V, independent of the device supply

utilized in order to eliminate the need for the pull-up resistor.

TLV4021, TLV4031, TLV4041, TLV4051

SNVSB04C – MARCH 2019 – REVISED DECEMBER 2021

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