TLV9032DDFR datasheet(21/68 Pages) TI

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7.4.1.2 TLV9032 and TLV9034 Push-Pull Output

The TLV903x features a push-pull output stage capable of both sinking and sourcing current. This allows driving

loads such as LED's and MOSFET gates, as well as eliminating the need for a power-wasting external pull-up

resistor. The push-pull output must never be connected to another output.

Unused push-pull outputs must be left floating, and never tied to a supply, ground, or another output. While an

individual output can typically sink and source up to 100mA, the total combined current for all channels must be

less than 200 mA.

7.4.2 Power-On Reset (POR)

The TLV90xx has an internal Power-on-Reset (POR) circuit for known start-up or power-down conditions. While

the power supply (Vs) is ramping up or ramping down, the POR circuitry will be activated for up to 30µs after the

minimum supply voltage threshold of 1.5V is crossed, or immediately when the supply voltage drops below 1.5V.

When the supply voltage is equal to or greater than the minimum supply voltage, and after the delay period, the

comparator output reflects the state of the differential input (VID).

The POR circuit will keep the output high impedance (HI-Z) during the POR period (ton).

Power On Reset Time (tON)

VOH / 2

VOL

OUT

+1.5V

Figure 7-1. Power-On Reset Timing Diagram

Note that it the nature of an open collector output that the output will rise with the pull-up voltage during the POR

period.

For the TL903x push-pull output devices, the output is "floating" during the POR period. A light pull-up (to V+)

or pull-down (to V-) resistor can be used to pre-bias the output condition to prevent the output from floating.

If output high is the desired start-up condition, then use the open collector TL902x, since a pull-up resistor is

already required.

7.4.3 Inputs

7.4.3.1 Rail to Rail Input

The TLV90xx input voltage range extends from 200mV below V- to 200 mV above V+. The differential input

voltage (VID) can be any voltage within these limits. No phase-inversion of the comparator output will occur when

the input pins exceed V+ or V-.

7.4.3.2 Fault Tolerant Inputs

The TLV90xx inputs are fault tolerant up to 5.5V independent of VS. Fault tolerant is defined as maintaining the

same high input impedance when VS is unpowered or within the recommended operating ranges.

The fault tolerant inputs can be any value between 0 V and 5.5 V, even while VS is zero or ramping up or down.

This feature avoids power sequencing issues as long as the input voltage range and supply voltage are within

the specified ranges. This is possible since the inputs are not clamped to V+ and the input current maintains its

value even when a higher voltage is applied to the inputs.

As long as one of the input pins remains within the valid input range, and the supply voltage is valid and not in

POR, the output state will be correct.

The following is a summary of input voltage excursions and their outcomes:

1. When both IN- and IN+ are within the specified input voltage range:

a. If IN- is higher than IN+ and the offset voltage, the output is low.

b. If IN- is lower than IN+ and the offset voltage, the output is high.

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TLV9020, TLV9021, TLV9022, TLV9024, TLV9030, TLV9031, TLV9032, TLV9034

SNOSDA3F – JUNE 2020 – REVISED MARCH 2023

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