TPL5111

The TPL5111 is a low-power, ultra-low quiescent current timer IC designed for battery-powered applications requiring precise timing control. It operates from a supply voltage range of 1.8 V to 5.5 V, making it suitable for systems powered by single-cell batteries or multiple cells in series. The device features an extremely low quiescent current of typically 10 nA in standby mode, enabling extended battery life in portable and remote sensing applications. This timer integrates a programmable delay circuit that allows users to set the on-time duration from 1 second to 24 hours using external resistors and capacitors. It also supports automatic retriggering, which extends the output pulse length if the trigger signal is reasserted during the active period—ideal for applications where events occur intermittently. The TPL5111 offers two operating modes: one-shot and auto-retriggerable, providing flexibility in system design without the need for additional logic components. The IC includes a built-in comparator and a push-pull output stage capable of sourcing up to 30 mA of current directly driving small loads such as LEDs, relays, or microcontrollers. Its output can be configured to either high-impedance (OFF) or active-high (ON), depending on the application’s power management strategy. Additionally, the TPL5111 has a dedicated enable pin (EN) that allows external control of the entire timer function, enhancing system-level power efficiency by disabling the timer when not needed. Designed for reliability in harsh environments, the TPL5111 is available in a compact 6-pin SOT-23 package and is rated for operation over a temperature range of –40°C to +125°C. It is commonly used in applications such as wireless sensor nodes, asset tracking devices, environmental monitoring systems, and intermittent data logging solutions where minimizing power consumption while maintaining accurate timing is critical. With its combination of low power consumption, flexible timing options, and robust performance, the TPL5111 provides an efficient solution for extending battery life in modern electronic systems that require periodic wake-up or timed activation.