Texas Instruments TPS3700DSET

Overview

TPS3700DSET from Texas Instruments is a high-voltage window voltage detector IC designed for overvoltage and undervoltage monitoring in power-rail supervision systems. It operates from 1.8 V to 18 V, features dual open-drain outputs (OUTA/OUTB), an internal 400 mV reference with ±1.0% threshold accuracy over temperature, and built-in 5.5 mV hysteresis. It is used in industrial control, automotive, and embedded computing applications requiring robust rail monitoring.

For engineers reviewing the TPS3700DSET datasheet, TPS3700DSET pinout, TPS3700DSET application, or TPS3700DSET equivalent, key selection considerations include its 18-V output rating independent of VDD, dual-polarity input configuration (INA+ for undervoltage, INB– for overvoltage), low 5.5 µA quiescent current, –40°C to 125°C operation, and WSON-6 package compatibility with space-constrained PCB layouts.

Technical Context

The TPS3700DSET integrates two precision comparators sharing a trimmed 400 mV internal reference: INA+ drives OUTA low when sensed voltage falls below (VIT+ – VHYS); INB– drives OUTB low when sensed voltage exceeds VIT+. Both outputs are open-drain, rated to 18 V, and support pull-up to any voltage ≤18 V-enabling interface with diverse logic families or reset inputs regardless of VDD level.

It implements fixed hysteresis (5.5 mV typical) to reject noise-induced false triggering and supports window detection via external resistor dividers. Its UVLO (1.3–1.7 V) and POR (0.8 V) ensure deterministic startup behavior, while input terminals tolerate up to 6.5 V independent of supply voltage-allowing direct monitoring of higher rails using resistive scaling.

Key Specifications

Pinout & Package

TPS3700DSET is packaged in a 1.5-mm × 1.5-mm WSON-6 (DSE) package with wettable flanks, optimized for automated optical inspection and thermal performance in compact layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar window voltage detector applications.

Compared with TLV809EVDQDBVR and MAX6816EUT+T, the TPS3700DSET uniquely delivers dual independent comparators with 400-mV reference, 18-V output capability, and true window detection-making it the only option among the three qualified for automotive-grade rail supervision with noise-immune, high-accuracy thresholds.

Availability

TPS3700DSET is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and embedded computing modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3700DSET 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 specializing in analog, embedded processing, and power management technologies with decades of automotive and industrial qualification expertise.

The TPS3700DSET belongs to TI's precision voltage supervisor product line, engineered specifically for high-reliability overvoltage/undervoltage monitoring in harsh environments where rail integrity directly impacts system safety and uptime.

FAQ

What is the function of the INA+ and INB– pins on the TPS3700DSET?

The INA+ pin serves as the noninverting input for undervoltage detection: when voltage at INA+ drops below (VIT+ – VHYS), OUTA is driven low. The INB– pin is the inverting input for overvoltage detection: when voltage at INB– rises above VIT+, OUTB is driven low. Together they enable window monitoring using external resistor dividers. This dual-input architecture is fundamental to the TPS3700DSET's ability to supervise both upper and lower voltage limits simultaneously.

Can the TPS3700DSET monitor a voltage higher than its own VDD supply?

Yes, the TPS3700DSET can monitor voltages exceeding its VDD-up to 6.5 V directly at INA+/INB–, and higher via external resistor dividers. For example, a 24-V rail can be scaled down to ≤6.5 V using a precision divider before connecting to INB–. The TPS3700DSET's input tolerance and 400-mV internal reference allow accurate threshold setting regardless of VDD level, making it ideal for multi-rail systems where supervision voltage differs from supply voltage.

What is the maximum output sink current supported by the TPS3700DSET?

The TPS3700DSET outputs (OUTA and OUTB) support a maximum sink current of 40 mA per channel, as specified in Absolute Maximum Ratings. In normal operation, typical sink capability is ≥3 mA at VOL ≤ 250 mV (VDD = 5 V, IO = 5 mA). This enables direct drive of standard logic inputs or reset lines without additional buffering-critical for minimizing BOM count in space-constrained designs using the TPS3700DSET.

Does the TPS3700DSET require external components to operate?

The TPS3700DSET requires only a 0.1-µF ceramic capacitor between VDD and GND for stable operation. External resistor dividers are needed only when monitoring voltages other than VDD or when setting custom thresholds-no external reference, hysteresis network, or pull-up resistors are mandatory but commonly used. The TPS3700DSET integrates all core supervision functions internally, reducing design complexity compared to discrete comparator solutions.

How does the TPS3700DSET handle power supply transients during startup?

The TPS3700DSET incorporates a 450 µs maximum start-up delay and undervoltage lockout (UVLO) threshold of 1.3–1.7 V to prevent false triggering during VDD ramp-up. Below UVLO, OUTA is forced low and OUTB enters high-impedance state; below POR (0.8 V), both outputs go high-Z. This staged power-on behavior ensures clean, glitch-free reset assertion-essential for reliable initialization of MCUs and FPGAs powered by the TPS3700DSET-supervised rails.