Texas Instruments TLV803EA29DPWR

Overview

TLV803EA29DPWR from Texas Instruments is an open-drain, active-low voltage supervisor IC designed for power-on reset and brownout detection in ultra-low-power systems. It features a 2.93 V factory-programmed threshold (±0.5% typical accuracy), 200 ms fixed reset delay, 250 nA typical supply current at 3.3 V, and operation down to 0.7 V supply voltage - enabling reliable reset assertion in battery-backed or energy-harvesting applications such as portable medical sensors and smart meters.

For engineers reviewing the TLV803EA29DPWR datasheet, TLV803EA29DPWR pinout, TLV803EA29DPWR application, or TLV803EA29DPWR equivalent, key selection considerations include its X2SON-5 (DPW) package footprint, manual reset (MR) input support, glitch immunity (10 µs typical), VPOR = 700 mV, and compatibility with 1.7–6 V supply rails in space-constrained industrial and IoT edge nodes.

Technical Context

The TLV803EA29DPWR implements a precision bandgap-referenced comparator with built-in hysteresis (VHYS = 0.9–1.5% of VIT–) to prevent chatter during slow-rising or noisy supply transitions. Its internal timer enforces a guaranteed 200 ms (A-variant) reset timeout after VDD exceeds VIT+ (2.93 V + VHYS), ensuring microcontrollers complete full initialization before release.

Unlike push-pull variants, the open-drain output requires an external pull-up resistor but enables wired-OR reset bus configurations and level-shifting across mixed-voltage domains. The MR pin (pin 2) provides asynchronous manual reset initiation with 500 ns minimum pulse width, supporting system-level diagnostics and safe firmware recovery.

Key Specifications

Pinout & Package

X2SON-5 (DPW) package: 0.8 mm × 0.8 mm, 0.35 mm pitch, thermal pad (pin 3) recommended to be connected to GND for improved thermal performance and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA29DBVR and TPS3809K33DBVR, the TLV803EA29DPWR offers the smallest footprint (0.64 mm²), integrated MR input for field serviceability, and open-drain output for multi-voltage domain compatibility - making it optimal for miniaturized, maintainable, and architecturally flexible embedded systems.

Availability

TLV803EA29DPWR is available at Aetrix Electronics and suitable for smart metering, portable medical devices, and industrial IoT edge nodes requiring stable component supply across extended product lifecycles.

Supply support for TLV803EA29DPWR 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 connectivity technologies with over 50 years of innovation in power management and signal chain solutions.

The TLV803E family was engineered for ultra-low-power, space-constrained applications including battery-operated instrumentation, energy metering, and industrial automation where precision voltage supervision and long-term reliability are critical.

FAQ

What is the exact reset threshold voltage of TLV803EA29DPWR and how accurate is it?

The TLV803EA29DPWR has a factory-programmed falling threshold voltage (VIT–) of 2.93 V with ±0.5% typical accuracy over –40°C to +125°C. This value is trimmed during production and specified in the Electrical Characteristics table (Section 7.5); actual units exhibit tighter distribution than the worst-case ±2% limit across temperature and voltage.

Does TLV803EA29DPWR require an external pull-up resistor on the RESET pin?

Yes, TLV803EA29DPWR uses an open-drain active-low output, so an external pull-up resistor is mandatory. A 10 kΩ resistor to the host logic rail (e.g., 3.3 V or 5 V) is recommended per the datasheet's test conditions; values between 4.7 kΩ and 100 kΩ are acceptable depending on rise time and noise immunity requirements.

What is the function of the MR pin on TLV803EA29DPWR and how is it used?

The MR (Manual Reset) pin (pin 2) is an active-low input that forces the RESET output low regardless of VDD level. Pulling MR low for ≥500 ns asserts reset; releasing it allows deassertion after the 200 ms delay. In the DPW package, MR has an internal 100 kΩ pull-up, so it may be left floating if unused.

Can TLV803EA29DPWR operate reliably below 1.0 V supply voltage?

Yes - TLV803EA29DPWR guarantees defined reset behavior down to VPOR = 700 mV and operates across 0.7 V to 6 V. Below 700 mV, the output state is undefined; above 700 mV, it monitors VDD and asserts RESET when voltage falls below 2.93 V, making it suitable for ultra-low-voltage energy harvesting systems.

How does the thermal pad (pin 3) on TLV803EA29DPWR affect performance?

The thermal pad (pin 3) on TLV803EA29DPWR is a non-electrical thermal interface. Soldering it to a GND plane reduces RθJB from 320.4°C/W to ~100°C/W in typical layouts, lowering junction temperature rise by up to 25°C under continuous operation - improving long-term reliability and parametric stability over temperature.