Texas Instruments TPS3703A5120DSER

Overview

TPS3703A5120DSER from Texas Instruments is a high-accuracy window voltage supervisor IC designed for overvoltage (OV) and undervoltage (UV) monitoring of low-voltage rails in safety-critical systems. It features ±0.25% typical threshold accuracy, 7 µA maximum quiescent current, fixed 1.2 V UV and 1.5 V OV thresholds with ±5% window tolerance, and a factory-configured 10 ms reset time delay (CT pin open). It operates across 1.7 V to 5.5 V supply range and is used in industrial motor drives and data center power sequencing.

For engineers reviewing the TPS3703A5120DSER datasheet, TPS3703A5120DSER pinout, TPS3703A5120DSER application, or TPS3703A5120DSER equivalent, key selection considerations include its integrated resistor-divider architecture eliminating external components, open-drain active-low RESET output with latch mode, manual reset (MR) support, and WSON-6 package compatibility with space-constrained PCB layouts.

Technical Context

The TPS3703A5120DSER implements dual precision comparators with an internal trimmed resistor divider and reference, enabling simultaneous OV and UV detection without external resistors. Its CT pin supports three timing modes: fixed 10 ms delay (CT floating), fixed 200 ms delay (CT tied to VDD), or programmable delay via external capacitor.

It uses internal hysteresis (0.3–0.8% of threshold) and glitch immunity (3.5 µs for SENSE, 25 ns for MR) to reject noise-induced false resets. The SENSE and VDD pins are separated to support redundant monitoring architectures required in industrial and grid infrastructure applications.

Key Specifications

Pinout & Package

TPS3703A5120DSER is housed in a 1.50 mm × 1.50 mm WSON-6 (DSE) package with wettable flanks, optimized for automated optical inspection (AOI) and high-density routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3703A5120DSER, the A5125 variant trades tighter timing for relaxed tolerance, while TLV809E25DBVR sacrifices window supervision and MR capability for lower cost and smaller footprint - neither offers the same combination of dual-threshold accuracy, latched output, and flexible timing.

Availability

TPS3703A5120DSER is available at Aetrix Electronics and suitable for motor drive power sequencing, industrial PLC I/O supervision, and data center server VRM monitoring requiring stable component supply and long-term lifecycle assurance.

Supply support for TPS3703A5120DSER 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 and embedded processing solutions, with deep expertise in precision analog, power management, and industrial interface technologies.

The TPS3703 product line was developed specifically for high-reliability, low-voltage window supervision in industrial automation, grid infrastructure, and enterprise computing - emphasizing accuracy, noise immunity, and integration to reduce system-level design risk.

FAQ

What is the exact overvoltage and undervoltage threshold configuration for TPS3703A5120DSER?

The TPS3703A5120DSER is configured with a fixed 1.2 V undervoltage (UV) threshold and 1.5 V overvoltage (OV) threshold, implementing a ±5% window tolerance. These values are factory-trimmed and do not require external resistors. The device's nomenclature "A5120" confirms the 1.2 V UV / 1.5 V OV pairing with 5% tolerance - verified in TI's SBVS249B datasheet Table 12-1 and Section 5 Device Comparison.

Does TPS3703A5120DSER support manual reset, and how is it implemented?

Yes, TPS3703A5120DSER supports manual reset via the MR pin (Pin 6). Driving MR below 0.3 V (VMR_L) asserts the RESET output low immediately, regardless of SENSE voltage. After MR is released, RESET remains low for the full reset delay (10 ms) before deasserting - provided SENSE is within the valid window. The MR pin has an internal 100 kΩ pull-up, so it may be left floating if unused.

What is the reset time delay behavior of TPS3703A5120DSER, and how is it set?

The TPS3703A5120DSER has a factory-programmed 10 ms reset delay when the CT pin (Pin 3) is left unconnected (open). This is its default timing mode. Connecting CT to VDD selects a 200 ms delay, while adding an external capacitor from CT to GND enables user-programmable delay - all without changing the TPS3703A5120DSER part number or PCB layout.

Can TPS3703A5120DSER monitor a different voltage than its own supply rail?

Yes. TPS3703A5120DSER separates the SENSE and VDD pins, allowing independent monitoring. For example, VDD can be powered from a 3.3 V auxiliary rail while SENSE monitors a 1.2 V core voltage. This separation supports redundancy requirements in safety-critical systems and avoids coupling supply noise into the monitored signal path.

What package type and thermal characteristics does TPS3703A5120DSER use?

TPS3703A5120DSER uses the WSON-6 (DSE) package: 1.50 mm × 1.50 mm body size with wettable flanks. Its junction-to-ambient thermal resistance (RθJA) is 184.2°C/W, and it operates across –40°C to +125°C ambient temperature. The small footprint and thermal performance make it suitable for compact, high-density industrial PCBs with constrained airflow.