Texas Instruments TPS3711DDCT

Overview

TPS3711DDCT from Texas Instruments is a precision 36-V voltage detector IC used for undervoltage monitoring in power rails and system reset generation. It features a 400-mV internal reference, ±0.75% overtemperature threshold accuracy, 7-µA typical quiescent current, open-drain output rated to 25 V, and operates across –40°C to +125°C. It is deployed in industrial control systems to assert reset signals when monitored supply voltages fall below programmable thresholds.

For engineers reviewing the TPS3711DDCT datasheet, TPS3711DDCT pinout, TPS3711DDCT application, or TPS3711DDCT equivalent, key selection considerations include its wide 1.8–36-V supply range, adjustable detection threshold via external resistor divider, built-in 5.5-mV hysteresis for noise immunity, low input leakage (<25 nA), and SOT-23-THIN (DDC) 6-pin package compatibility with high-density PCB layouts.

Technical Context

The TPS3711DDCT integrates a precision comparator with an internal 400-mV reference and operates as a standalone voltage supervisor-no external reference required. Its SENSE pin accepts input voltages up to 6.5 V (independent of VDD), enabling monitoring of higher-voltage rails via resistor dividers while maintaining sub-1% threshold accuracy over temperature.

It implements three functional modes: normal operation above 1.8 V (with 155-µs startup delay), undervoltage lockout between 1.3 V and 1.7 V (OUT asserted regardless of SENSE), and power-on reset below 0.8 V (high-impedance OUT). The open-drain output supports pullup to 25 V, decoupled from VDD, allowing interface with diverse logic families and enable inputs.

Key Specifications

Pinout & Package

TPS3711DDCT is housed in a SOT-23-THIN (DDC) 6-pin package measuring 2.90 mm × 1.60 mm, optimized for space-constrained industrial and embedded applications. All three ground pins (2, 4, 6) must be connected to PCB ground for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809EC26DBZR and MAX6326US26D3+, the TPS3711DDCT uniquely supports 1.8–36-V operation, user-adjustable thresholds down to 400 mV, and 25-V open-drain output-making it the only option capable of supervising industrial 24-V and automotive 28-V rails without external components.

Availability

TPS3711DDCT is available at Aetrix Electronics and suitable for industrial control systems, embedded computing modules, and FPGA/ASIC power sequencing requiring stable component supply and long-term manufacturability.

Supply support for TPS3711DDCT 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 experience in high-reliability industrial and automotive IC design.

The TPS3711DDCT belongs to TI's precision voltage supervisor product line, engineered specifically for robust undervoltage detection in harsh environments where wide input range, high accuracy, and noise immunity are critical.

FAQ

What is the maximum input voltage the SENSE pin of the TPS3711DDCT can tolerate?

The SENSE pin of the TPS3711DDCT accepts voltages from 0 V to 6.5 V, independent of the VDD supply voltage. This allows direct monitoring of higher-voltage rails (e.g., 24 V or 36 V) using an external resistor divider without risk of damage. Absolute maximum rating is 7.0 V, and operation above 6.5 V is not recommended per datasheet specifications. The TPS3711DDCT maintains low input leakage (<25 nA) across this range, preserving divider accuracy.

Does the TPS3711DDCT require an external reference or calibration?

No, the TPS3711DDCT integrates a precision 400-mV internal reference trimmed to ±0.25% typical and ±0.75% over temperature, eliminating the need for external references or system-level calibration. Its comparator architecture uses this reference directly against the SENSE pin voltage, enabling accurate undervoltage detection with only two external resistors. The TPS3711DDCT achieves this accuracy across –40°C to +125°C without additional compensation components.

Can the TPS3711DDCT output drive a 5-V logic input directly?

Yes, the TPS3711DDCT features an open-drain output rated to 25 V, allowing it to interface directly with 5-V logic inputs using an appropriate pullup resistor (e.g., 10 kΩ to 5 V). The output sinks up to 10 mA and maintains VOL ≤ 250 mV at 5 mA sink current, ensuring solid logic-low levels. Since the pullup voltage is independent of VDD, the TPS3711DDCT can assert reset to 3.3-V, 5-V, or 12-V systems without level shifters-confirming full compatibility with standard logic families.

What is the startup behavior of the TPS3711DDCT after power application?

Upon VDD ramp-up, the TPS3711DDCT enters undervoltage lockout (UVLO) until VDD exceeds 1.5 V (typ), then requires ≥155 µs (typ) at VDD > 1.8 V before the output reflects the SENSE pin state. During this startup delay, OUT remains asserted if VDD is between V(POR) (0.8 V) and UVLO (1.5 V), providing fail-safe reset hold. The TPS3711DDCT guarantees this timing across –40°C to +125°C, ensuring reliable initialization in cold-start industrial environments.

How does the TPS3711DDCT handle noise on the monitored voltage rail?

The TPS3711DDCT incorporates 5.5-mV typical internal hysteresis between VIT+ (405.5 mV) and VIT– (400 mV), preventing output oscillation during slow or noisy threshold crossings. Its SENSE pin also exhibits low input capacitance and supports optional 1–10-nF bypass capacitors for transient suppression. The TPS3711DDCT further rejects short-duration spikes via minimum pulse-width requirements (e.g., 2 µs for 10% overdrive), making it robust against EFT and load-switching noise in industrial settings.