Texas Instruments TPS3702CX33DDCT

Overview

TPS3702CX33DDCT from Texas Instruments is a high-accuracy window voltage detector IC designed for monitoring 3.3V supply rails. It delivers ±0.25% typical threshold accuracy, 0.55% internal hysteresis, and operates across 2V–18V supply range with 7µA typical quiescent current. It provides independent open-drain UV and OV outputs for fault signaling in FPGA power integrity systems.

For engineers reviewing the TPS3702CX33DDCT datasheet, TPS3702CX33DDCT pinout, TPS3702CX33DDCT application, or TPS3702CX33DDCT equivalent, this page delivers verified functional role, validated SOT-6 pin mapping, confirmed 3.3V nominal rail support, temperature-stable ±0.9% accuracy over –40°C to 125°C, and real-world design meaning of SET-pin configurable accuracy bands.

Technical Context

The TPS3702CX33DDCT integrates two precision comparators and a trimmed internal resistor divider to form a fixed-window detector optimized for 3.3V nominal rails. Its dual open-drain outputs (UV/OV) operate independently, each sinking up to 10mA with VOL ≤ 250mV at 5mA load, and support pull-up voltages up to 18V regardless of VDD.

Threshold configuration is controlled via the SET pin: logic-high (≥750mV) selects ±4% nominal band (±4.9% worst-case), while logic-low (≤250mV) selects ±9% nominal band (±9.9% worst-case). Startup delay is 300µs, and propagation delays are 19µs (HL) and 35µs (LH) under 2.5% overdrive.

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 MAX6816EUT+T and TLV809E33DBZR, the TPS3702CX33DDCT uniquely delivers true window supervision (UV + OV), ±0.9% accuracy over temperature, and user-configurable bands - making it the only option for safety-critical 3.3V rail integrity where both over- and undervoltage faults must be independently signaled.

Availability

TPS3702CX33DDCT is available at Aetrix Electronics and suitable for FPGA power integrity, DSP core supervision, and industrial PLC I/O module protection requiring stable component supply and guaranteed long-term manufacturability.

Supply support for TPS3702CX33DDCT 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The TPS3702 family is engineered specifically for high-accuracy, low-power window voltage monitoring in systems with tight supply tolerances - targeting FPGA, ASIC, and DSP platforms where rail integrity directly impacts functional safety and data integrity.

FAQ

What is the nominal monitored voltage for TPS3702CX33DDCT?

The TPS3702CX33DDCT is factory-configured for 3.3V nominal rails. Its internal thresholds are trimmed to detect deviations from 3.3V - specifically, ±4% nominal band (±4.9% worst-case including accuracy) when SET ≥ 750mV, or ±9% nominal band (±9.9% worst-case) when SET ≤ 250mV. This is confirmed in Section 7.2.1 and Figure 6-1 of the official datasheet.

Does TPS3702CX33DDCT require external resistors to set thresholds?

No, the TPS3702CX33DDCT does not require external resistors. It integrates a precision trimmed resistor divider and reference, eliminating external components and associated tolerance errors. This is explicitly stated in Section 3 ("The TPS3702 does not require any external resistors...") and Section 6.3.1, ensuring ±0.9% accuracy over temperature without design margin penalties.

Can TPS3702CX33DDCT monitor a voltage higher than its VDD supply?

Yes, the SENSE pin accepts up to 6.5V regardless of VDD (which can be as low as 2V). For example, TPS3702CX33DDCT can monitor a 5V rail while powered from a 3.3V VDD. This capability is documented in Section 5.3 (Recommended Operating Conditions) and Figure 7-3, enabling flexible power domain isolation in multi-rail systems.

What is the function of the SET pin on TPS3702CX33DDCT?

The SET pin configures the nominal window width: applying ≥750mV selects ±4% (tighter band), while ≤250mV selects ±9% (wider band). This allows dynamic adaptation - e.g., wider band during startup to avoid false trips, then tightening post-boot. The behavior is defined in Section 6.3.3 and Table 10-1, with electrical thresholds VIH/ VIL specified in Section 5.5.

Is TPS3702CX33DDCT qualified for industrial temperature operation?

Yes, TPS3702CX33DDCT is fully qualified for –40°C to 125°C junction temperature operation. Electrical characteristics, including ±0.9% threshold accuracy and 7µA quiescent current, are guaranteed across this range (Section 5.5). Thermal metrics (RθJA = 201.6°C/W) and packaging (SOT-6) support sustained operation in industrial enclosures without forced cooling.