TPS3808E

The TPS3808E is a high-precision voltage supervisor IC designed by Texas Instruments for reliable power management in embedded systems. It monitors supply voltages and ensures system stability by asserting a reset signal when the monitored voltage falls below a predefined threshold. The device features a factory-programmed threshold of 3.0 V with a typical hysteresis of 150 mV, enabling accurate detection of power supply deviations. Its low quiescent current—typically 2.5 μA—makes it ideal for battery-powered and energy-sensitive applications. This supervisor offers a precise and stable reset output that remains active during power-up, power-down, or brownout conditions. It includes an internal 200 ms timeout delay to ensure proper system initialization after power application, preventing false resets due to transient voltage spikes. The TPS3808E operates over a wide input voltage range from 1.6 V to 5.5 V, making it suitable for various power domains in portable electronics, microcontroller-based systems, and IoT devices. One key feature is its ability to function as a manual reset input via an external push-button, allowing users to trigger a system reset without interrupting the power supply. This functionality supports both automatic and manual system recovery mechanisms, enhancing system robustness. Additionally, the device incorporates an open-drain reset output capable of sinking up to 10 mA, which simplifies integration with microcontrollers and other logic circuits. The TPS3808E is available in a compact SOT-23-5 package, offering space-efficient implementation in densely populated PCB designs. It is optimized for operation in industrial, automotive, and consumer environments, with a wide operating temperature range from –40°C to +125°C. Its reliable performance under varying environmental conditions makes it well-suited for harsh or unpredictable power scenarios. Designed for simplicity and ease of use, the TPS3808E requires no external components for basic operation, reducing design complexity and component count. It is commonly used in applications such as smart meters, medical devices, wearables, and industrial control systems where dependable power monitoring and reset management are critical. By ensuring system integrity through precise voltage supervision, this device enhances overall reliability and reduces the risk of data corruption or hardware malfunction.