Texas Instruments TPS3702CX50DDCT

Overview

TPS3702CX50DDCT from Texas Instruments is a high-accuracy window voltage detector IC designed for precision overvoltage and undervoltage monitoring of low-voltage supply rails (1V–5V nominal). It delivers ±0.25% typical threshold accuracy, 0.55% internal hysteresis, and operates across 2V–18V supply with 7µA typical quiescent current. Used in FPGA power sequencing and safety-critical industrial control systems where narrow supply margins demand reliable fault detection.

For engineers reviewing the TPS3702CX50DDCT datasheet, TPS3702CX50DDCT pinout, TPS3702CX50DDCT application, or TPS3702CX50DDCT equivalent, key selection criteria include its dual open-drain OV/UV outputs, SET-pin configurable accuracy bands (±4% or ±9% nominal), SOT-6 package footprint, –40°C to 125°C industrial temperature range, and internal resistor-divider architecture eliminating external component error sources.

Technical Context

The TPS3702CX50DDCT integrates two precision comparators and a trimmed internal resistor divider to form a fully self-contained window detector. Its VIT–(UV) and VIT+(OV) thresholds are factory-trimmed for ±0.9% max error over –40°C to 125°C, with hysteresis fixed at 0.55% of the nominal trip point to prevent chatter near threshold boundaries.

It supports independent VDD (2V–18V), SENSE (0–6.5V), and pull-up rail (up to 18V) voltages, enabling flexible interfacing with diverse power domains. The SET pin selects between two pre-programmed accuracy bands-tight (±4%) or wide (±9%)-allowing dynamic adjustment during system startup or operational mode changes without hardware modification.

Key Specifications

Pinout & Package

SOT-6 (DDC) package: 2.90mm × 1.60mm body size, 0.95mm max height, gull-wing leads, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326US29D3+ and TLV809E29DBZR, the TPS3702CX50DDCT uniquely provides user-selectable accuracy bands, independent OV/UV outputs, and full 2V–18V supply operation - making it the only option capable of replacing both alternatives in a single, space-constrained window-monitoring role.

Availability

TPS3702CX50DDCT is available at Aetrix Electronics and suitable for FPGA power sequencing, industrial PLC backplane supervision, and building automation controller designs requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TPS3702CX50DDCT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS3702 family is part of TI's precision voltage supervisor portfolio, engineered specifically for high-reliability power-rail monitoring in systems with tight supply tolerances and demanding environmental conditions.

FAQ

What is the function of the SET pin on the TPS3702CX50DDCT?

The SET pin on the TPS3702CX50DDCT selects between two factory-programmed accuracy bands: a logic-high voltage (≥750 mV) configures ±4% nominal thresholds, while a logic-low voltage (≤250 mV) configures ±9% nominal thresholds. This allows dynamic adjustment of detection sensitivity - for example, widening the band during system startup to avoid nuisance resets, then tightening it during normal operation. The internal 600 nA pull-up current helps maintain default state when unconnected.

Can the TPS3702CX50DDCT monitor a 5V rail with ±5% tolerance including device accuracy?

Yes. With SET pin high, the TPS3702CX50DDCT provides ±4% nominal thresholds. Adding the worst-case ±0.9% accuracy over temperature yields a total window of ±4.9%, satisfying a ±5% system requirement. For a 5V rail, this corresponds to VIT–(UV) = 4.755V and VIT+(OV) = 5.245V - verified in TI's SBVS251A datasheet Section 7.2.1 design examples.

Does the TPS3702CX50DDCT require external resistors to set thresholds?

No. The TPS3702CX50DDCT integrates a precision trimmed resistor divider and reference, eliminating all external components needed to set overvoltage and undervoltage thresholds. This architecture removes resistor tolerance errors, reduces PCB area by ~3 mm², and improves overall system accuracy - a key differentiator versus discrete comparator-based solutions requiring matched external resistors.

What is the maximum voltage that can be applied to the SENSE pin of the TPS3702CX50DDCT?

The absolute maximum voltage on the SENSE pin is 7.0 V, but the recommended operating range is 0 V to 6.5 V. This allows direct monitoring of rails up to 6.5 V without attenuation, independent of VDD voltage. For higher-voltage rails (e.g., 12 V or 24 V), an external resistor divider is required - with design guidance provided in TI application report SLVA450 to maintain accuracy despite SENSE input bias current (≤1.5 µA).

How does the TPS3702CX50DDCT behave during power-up when VDD is ramping?

During VDD ramp-up, the TPS3702CX50DDCT enters Undervoltage Lockout (UVLO) mode until VDD exceeds 1.3–1.7 V. Once above UVLO, a 300 µs startup delay (t_SD) begins; only after this delay does the device assert valid UV/OV outputs based on SENSE voltage. Below the power-on reset voltage (V(POR) = 0.8 V), outputs are undefined - ensuring no spurious reset signals during initial power application.