9 Detailed Description

9.1 Overview

The TLV301xB-Q1 is a MicroPower comparator with an integrated reference that is well suited for compact,

low-current, precision voltage detection applications. With a high-accuracy, internal reference of 1.242 V and 3.1

uA of quiescent current, the TLV301xB-Q1 enables power conscious systems to monitor and respond quickly to

fault conditions.

9.2 Functional Block Diagram

IN-

REF

IN+

OUT

V+

V-

1.242V

Reference

+

9.3 Feature Description

The TLV301x-Q1 is comprised of a rail-to-rail input comparator with open-drain or push-pull output options and a

voltage reference that is externally available.

9.4 Device Functional Modes

The TLV301x-Q1 requires an operating voltage between 1.8 V and 5.5 V for the comparator output to reflect the

voltage applied to the inputs. Similarly, the reference output (REF) will also be valid over the same operating

voltage range. The "B" versions add hysteresis, power on reset, fail-safe inputs and a 1.65 V minimum supply

voltage.

9.4.1 Open Drain Output (TLV3011-Q1 and TLV3011B-Q1)

The TLV3011-Q1 features an Open-Drain (sinking only) output that allows multiple devices to be driven by a

single pull-up resistor to accomplish an OR function, making the TLV3011-Q1 useful for logic applications. The

value of the pull-up resistor and supply voltage used will affect current consumption due to additional current

drawn when the output is in a low state. This effect can be seen in the typical curve Quiescent Current vs Output

Switching Frequency.

For the TLV3011-Q1, the pull-up voltage must be less than, or equal to, the V+ supply voltage (VPULLUP ≤ V+).

The TLV3011B-Q1 may be pulled-up to any voltage up to 5.5V, regardless of the supply voltage.

9.4.2 Push-Pull Output (TLV3012-Q1 and TLV3012B-Q1)

The TLV3012-Q1 has a "Push-Pull" output capable of both sinking and sourcing current. The push-pull output

stage is optimal for reduced power budget applications by eliminating the need for a pull-up resistor and features

no shoot-through current. Do not tie push-pull outputs together.

9.4.3 Voltage Reference

The integrated 1.242-V voltage reference offers low 100-ppm/°C (maximum) drift provided on a seporate output

pin that allows use of external dividers or to provide a reference voltage for other external circuitry. The reference

is stable with up to a 10-nF capacitive load and can sink or source up to 500µA (typical) of output current.

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

SBOS551C – MARCH 2011 – REVISED APRIL 2023

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Product Folder Links: TLV3011-Q1 TLV3012-Q1 TLV3011B-Q1 TLV3012B-Q1