TLV3012-Q1

V+

5 V

REF

–

+

V

IN

V

REF

V

OUT

V

HYST = 0.38 V

R1

39 kΩ

R2

560 kΩ

Copyright © 2016, Texas Instruments Incorporated

Figure 10-2. Adding Hysteresis

The VHYST voltage sets the value of the transition voltage required to switch the comparator output by increasing

the threshold region, thereby reducing sensitivity to noise.

10.1.2 TLV3011B-Q1 and TLV3012B-Q1 Hysteresis

The TLV3011B-Q1 and TLV3012B-Q1 have typically 6mV of built-in hysteresis. External hysteresis can still be

added as explained in the previous section.

10.2 Typical Application

10.2.1 Under-Voltage Detection

Under-voltage detection is frequently required to alert the system that a battery voltage has dropped below the

usable voltage level. Figure 23 shows a simple under-voltage detection circuit using the TLV3012-Q1 which is

configured as a non-inverting comparator with the integrated 1.242 V reference is externally connected to the

inverting input pin (IN-).

V

BAT

ALERT

Micro-

controller

V+

1.242V

+

t

TLV3012-Q1

R

1

R

2

Figure 10-3. Under-Voltage Detection

10.2.1.1 Design Requirements

For this design, follow these design requirements:

• Operate from power supply that powers the microcontroller.

• Under-voltage alert is active low.

• Logic low output when VBAT is less than 2.0V.

TLV3011-Q1, TLV3012-Q1, TLV3011B-Q1, TLV3012B-Q1

SBOS551C – MARCH 2011 – REVISED APRIL 2023

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