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TPS3710-Q1

SBVS341 – JULY 2017

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7.3 Feature Description

7.3.1 Input (SENSE)

The TPS3710-Q1 comparator has two inputs: one external input, and one input connected to the internal

reference. The comparator rising threshold is trimmed to be equal to the reference voltage (400 mV). The

comparator also has a built-in falling hysteresis that makes the device less sensitive to supply-rail noise and

provides stable operation.

The comparator input (SENSE) is able to swing from ground to 6.5 V, regardless of the device supply voltage.

Although not required in most cases, in order to reduce sensitivity to transients and layout parasitics for

extremely noisy applications, place a 1-nF to 10-nF bypass capacitor at the comparator input.

output (OUT) goes to a high-impedance state; see Figure 1.

7.3.2 Output (OUT)

In a typical TPS3710-Q1 application, the output is connected to a reset or enable input of the processor (such as

a digital signal processor [DSP], central processing unit [CPU], field-programmable gate array [FPGA], or

application-specific integrated circuit [ASIC]) or the output is connected to the enable input of a voltage regulator

(such as a dc-dc converter or low-dropout regulator [LDO]).

The TPS3710-Q1device provides an open-drain output (OUT). Use a pullup resistor to hold this line high when

the output goes to high impedance (not asserted). To connect the output to another device at the correct

interface-voltage level, connect a pullup resistor to the proper voltage rail. The TPS3710-Q1 output can be pulled

up to 18 V, independent of the device supply voltage.

Table 1 and the Input (SENSE) section describe how the output is asserted or deasserted. See Figure 1 for a

timing diagram that describes the relationship between threshold voltage and the respective output.

7.3.3 Immunity to Input-Pin Voltage Transients

The TPS3710-Q1i s relatively immune to short voltage transient spikes on the sense pin. Sensitivity to transients

depends on both transient duration and amplitude; see Figure 7, Minimum Pulse Width vs Threshold Overdrive

Voltage.

7.4 Device Functional Modes

SENSE as listed in Table 1.

7.4.3

SENSE is in a high-impedance state.