Texas Instruments TLV4051R5DBVR

Overview

TLV4051R5DBVR from Texas Instruments is a precision, low-power, inverting-input comparator with integrated 0.5 V reference and push-pull output. It operates from 1.6 V to 5.5 V, draws only 2 µA quiescent current, delivers 360 ns propagation delay, and functions across –40°C to +125°C - enabling accurate voltage monitoring in space-constrained, battery-powered systems such as lithium-ion protection circuits.

For engineers reviewing the TLV4051R5DBVR datasheet, TLV4051R5DBVR pinout, TLV4051R5DBVR application, or TLV4051R5DBVR equivalent, key selection criteria include its factory-trimmed 0.5 V threshold (±0.5% at 25°C, ±1% over temperature), precision hysteresis (20 mV), rail-to-rail input stage, known power-on reset behavior, and SOT-23-5 package compatibility with high-density PCB layouts.

Technical Context

The TLV4051R5DBVR implements an inverting-input architecture where the internal 0.5 V reference is compared against the external signal applied to the IN pin: output asserts low when IN exceeds 0.5 V (V_IT+ = 0.495–0.505 V at 25°C) and asserts high when IN falls below 0.475–0.485 V. Its push-pull output drives both logic-high and logic-low states without external pull-up, supporting direct interfacing with MCU GPIOs or digital control logic.

Power-on reset ensures deterministic startup: output remains asserted low until supply reaches ≥1.45 V, eliminating undefined states during brown-in/out. The device's 20 mV hysteresis rejects noise on slow-moving inputs, while its 10 pA input bias current minimizes loading on high-impedance sensing nodes - critical for precision battery voltage monitoring and point-of-load fault detection.

Key Specifications

Pinout & Package

SOT-23-5 package (2.9 mm × 1.6 mm), surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator-with-reference applications.

Compared with TLV4041R5DBVR and TLV4051R2DBVR, the TLV4051R5DBVR uniquely combines inverting input polarity, 0.5 V precision reference, and push-pull output - making it optimal for compact, low-power systems requiring active-low fault flags with mid-range voltage detection.

Availability

TLV4051R5DBVR is available at Aetrix Electronics and suitable for lithium-ion battery protection, point-of-load undervoltage detection, and self-diagnostic power sequencing requiring stable component supply and long-term industrial availability.

Supply support for TLV4051R5DBVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV40x1 product line was designed specifically for ultra-low-power, precision voltage monitoring in space-constrained applications - integrating factory-trimmed references, hysteresis, and robust startup behavior to replace discrete comparator + reference + hysteresis resistor designs.

FAQ

What is the input configuration of the TLV4051R5DBVR?

The TLV4051R5DBVR features an inverting input configuration: the output asserts low when the voltage at the IN pin exceeds the internal 0.5 V reference threshold (V_IT+), and asserts high when the IN voltage falls below the hysteresis-adjusted lower threshold (V_IT−). This topology is ideal for active-low fault signaling in battery protection and power monitoring circuits where rising input conditions indicate failure.

Does the TLV4051R5DBVR require an external pull-up resistor?

No, the TLV4051R5DBVR does not require an external pull-up resistor because it uses a push-pull output stage. The output actively drives high (to V+) or low (to V−) without external components, simplifying interface design and reducing power consumption compared to open-drain alternatives like TLV4031R5DBVR.

What is the guaranteed accuracy of the 0.5 V reference in TLV4051R5DBVR over temperature?

The TLV4051R5DBVR's 0.5 V reference is guaranteed to be accurate within ±1% over the full operating temperature range of –40°C to +125°C, with tighter ±0.5% tolerance specified at 25°C. This is achieved through factory trimming and process compensation, enabling reliable voltage detection in automotive and industrial environments without calibration.

How does the power-on reset (POR) function in TLV4051R5DBVR?

The TLV4051R5DBVR incorporates a power-on reset circuit that holds the output asserted low until the supply voltage (V+) reaches ≥1.45 V. This ensures a known, safe startup state - critical for preventing erroneous system initialization - and transitions to normal comparator operation only after the internal reference and output stage stabilize.

Can TLV4051R5DBVR operate from a 1.8 V supply?

Yes, the TLV4051R5DBVR is fully specified to operate from 1.6 V to 5.5 V, including 1.8 V. At 1.8 V, it maintains 2 µA quiescent current, 360 ns propagation delay (with 15 pF load), and retains full reference accuracy and hysteresis performance - making it suitable for low-voltage IoT sensors and energy-harvesting systems.