Texas Instruments TPS3702AX33DDCR

Overview

TPS3702AX33DDCR from Texas Instruments is a high-accuracy window voltage detector IC designed for monitoring 3.3V nominal supply rails. It delivers ±0.25% typical threshold accuracy, 0.55% internal hysteresis, and operates across 2V–18V VDD with –40°C to 125°C industrial temperature range. Its dual open-drain outputs (UV/OV) independently flag undervoltage and overvoltage faults in FPGA power sequencing and safety-critical embedded systems.

For engineers reviewing the TPS3702AX33DDCR datasheet, TPS3702AX33DDCR pinout, TPS3702AX33DDCR application, or TPS3702AX33DDCR equivalent, key selection considerations include its fixed 3.3V nominal rail support, SET-pin configurable accuracy bands (±4%/±9%), 7µA quiescent current, SOT-6 package footprint, and independent UV/OV fault signaling for redundant reset architectures.

Technical Context

The TPS3702AX33DDCR integrates two precision comparators with an internal trimmed resistor divider and reference to form a fully self-contained window detector. It eliminates external resistors by embedding threshold-setting networks, directly supporting 3.3V nominal rails with worst-case ±4.9% total window (including ±0.9% temp drift).

Its functional architecture separates SENSE input from VDD supply, enabling rail monitoring independent of device power source. The SET pin selects between two factory-trimmed accuracy bands, while UV and OV outputs operate as active-low, open-drain signals capable of sinking 10mA and tolerating up to 18V pull-up voltages - enabling interoperability with diverse logic families and voltage domains.

Key Specifications

Pinout & Package

SOT-6 (DDC) package, 2.90mm × 1.60mm body size, surface-mount, thermally enhanced for industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3702AX33DDCR, the CX33 variant offers wider tolerance for startup flexibility but sacrifices runtime precision, while MAX6816EUT+T reduces cost and current at the expense of missing overvoltage protection and rail-specific accuracy - making TPS3702AX33DDCR optimal for dual-fault detection on 3.3V systems demanding ±4.9% total window control.

Availability

TPS3702AX33DDCR is available at Aetrix Electronics and suitable for FPGA power sequencing, DSP-based motor control, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3702AX33DDCR 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 expertise in precision analog ICs and industrial-grade reliability.

The TPS3702 family was engineered specifically for high-accuracy, dual-threshold power supply monitoring in safety-critical and mission-critical systems - targeting applications where narrow voltage margins, temperature stability, and fault isolation are non-negotiable design requirements.

FAQ

What is the nominal monitored rail voltage for the TPS3702AX33DDCR?

The TPS3702AX33DDCR is factory-trimmed for 3.3V nominal supply rails. Its internal resistor network sets overvoltage and undervoltage thresholds centered on 3.3V, delivering worst-case trip points of 3.139V (UV) and 3.463V (OV) across –40°C to 125°C, including ±0.9% accuracy drift. This eliminates manual resistor selection and calibration for 3.3V system monitoring.

How does the SET pin affect the TPS3702AX33DDCR's detection window?

The SET pin on the TPS3702AX33DDCR selects between two factory-configured accuracy bands: applying >750mV selects the ±4% nominal band (tighter window), while <250mV selects the ±9% band (wider window). For the AX33 variant, this yields ±4.9% total window (±4% + ±0.9% temp drift) in tight mode - enabling dynamic adjustment during boot vs. runtime without hardware changes.

Can the TPS3702AX33DDCR monitor a voltage higher than its VDD supply?

Yes - the SENSE input of the TPS3702AX33DDCR accepts up to 6.5V regardless of VDD, which can be as low as 2V. This allows direct monitoring of a 3.3V rail while powering the TPS3702AX33DDCR from a lower auxiliary supply (e.g., 2.5V or 3.3V LDO), simplifying power domain isolation and improving system-level fault containment.

What is the maximum sink current capability of the UV and OV outputs on the TPS3702AX33DDCR?

The UV and OV outputs of the TPS3702AX33DDCR each support up to 10mA sink current at VOL ≤ 250mV, verified across VDD = 1.3V to 5V. This enables direct interfacing with standard CMOS/TTL inputs, driving LEDs, or pulling down reset lines of MCUs, FPGAs, or DC-DC enable pins without external buffers - maintaining compatibility with 1.8V, 3.3V, and 5V logic families.

Does the TPS3702AX33DDCR require external components for basic operation?

No external resistors are required for threshold setting on the TPS3702AX33DDCR due to its integrated precision resistor divider. Only two mandatory external components are needed: a 0.1µF ceramic capacitor on VDD for supply decoupling, and pull-up resistors (2.2kΩ–10kΩ) on UV/OV outputs to establish logic-high states. This minimizes BOM count, PCB area, and calibration effort versus discrete comparator solutions.