Texas Instruments TLV4051R2YKAR

Overview

TLV4051R2YKAR from Texas Instruments is a precision, low-power, inverting-input comparator with push-pull output and factory-trimmed 0.2 V internal reference. 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 - ideal for lithium-ion battery voltage monitoring and overvoltage protection in space-constrained portable electronics.

For engineers reviewing the TLV4051R2YKAR datasheet, TLV4051R2YKAR pinout, TLV4051R2YKAR application, or TLV4051R2YKAR equivalent, key selection criteria include its inverting input topology, 0.2 V precision threshold with 20 mV hysteresis, push-pull output drive capability (3 mA sourcing/sinking), rail-to-rail input stage, and DSBGA-4 package compatibility with ultra-dense PCB layouts.

Technical Context

The TLV4051R2YKAR implements a precision comparator core with an internal 0.2 V reference trimmed to ±0.5% at 25°C and ±1% over temperature. Its inverting input configuration means output asserts low when IN exceeds VIT+ (0.200 V typ) and asserts high when IN falls below VIT− (0.180 V typ), enabling clean undervoltage detection with built-in hysteresis.

It integrates a Power-on Reset (POR) circuit that holds the push-pull output low during power ramp-up until supply reaches ≥1.45 V, ensuring deterministic startup. The rail-to-rail input stage supports common-mode voltages from V− to V+, and the output swings within 100 mV of rails under 200 µA load across full temperature range.

Key Specifications

Pinout & Package

TLV4051R2YKAR is packaged in a 0.73 mm × 0.73 mm, 4-bump DSBGA (YKA) package optimized for ultra-compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4051R2DBVR and TLV4041R2YKAR, the TLV4051R2YKAR uniquely combines inverting input functionality, sub-1 mm² DSBGA packaging, and 2 µA quiescent current - making it the optimal choice for miniaturized battery protection and ultra-low-power voltage supervision where board area and polarity alignment are critical.

Availability

TLV4051R2YKAR is available at Aetrix Electronics and suitable for lithium-ion battery management, point-of-load voltage monitoring, and industrial sensor conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV4051R2YKAR 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 leader delivering analog and embedded processing solutions, with decades of expertise in precision analog ICs and low-power design.

The TLV40x1 product line was engineered specifically for space- and power-constrained voltage monitoring applications - integrating precision references, hysteresis, and robust startup behavior into ultra-small packages for battery-powered and automotive systems.

FAQ

What is the input configuration of the TLV4051R2YKAR?

The TLV4051R2YKAR features an inverting input configuration: its output asserts low when the IN pin voltage exceeds the internal 0.2 V reference (VIT+), and asserts high when IN falls below the hysteresis-adjusted lower threshold (VIT− ≈ 0.18 V). This makes TLV4051R2YKAR ideal for undervoltage detection circuits where a rising output indicates a fault condition.

Does the TLV4051R2YKAR require external components to set its threshold?

No - the TLV4051R2YKAR integrates a factory-trimmed 0.2 V precision reference, eliminating the need for external resistors or reference ICs. The threshold is fixed and specified as 0.200 V ±0.5% at 25°C and ±1% over –40°C to +125°C. External resistor dividers are only required if monitoring voltages higher than 0.2 V (e.g., battery voltage scaling).

What is the purpose of the Power-on Reset (POR) circuit in the TLV4051R2YKAR?

The POR circuit in TLV4051R2YKAR ensures deterministic startup by holding the push-pull output low until the supply voltage (V+) reaches ≥1.45 V. This prevents undefined or glitchy output states during power ramp-up - critical for reliable enable/disable sequencing in battery-powered systems and avoids false triggering of downstream logic or power switches.

Can the TLV4051R2YKAR operate from a 1.8 V supply?

Yes - the TLV4051R2YKAR is fully specified to operate from 1.6 V to 5.5 V. At 1.8 V, it maintains 2 µA quiescent current, 360 ns propagation delay, and retains full accuracy of its 0.2 V reference (±1% over temperature). This makes TLV4051R2YKAR compatible with modern ultra-low-voltage microcontrollers and energy-harvesting systems.

How does the hysteresis of the TLV4051R2YKAR improve system reliability?

The TLV4051R2YKAR incorporates 20 mV of precision factory-trimmed hysteresis between its rising (VIT+) and falling (VIT−) thresholds. This prevents output oscillation when input signals hover near the trip point due to noise or slow slew rates - ensuring single, clean transitions in applications like battery voltage monitoring and motor controller fault detection.