1 Features

1• Supply Voltage From 1.8 V to 5.5 V

• Current Consumption at 2.5 V and 35 nA (Typical)

• Selectable Time Intervals: 100 ms to 7200 s

• Timer Accuracy: 1% (Typical)

• Resistor Selectable Time Interval

• Watchdog Functionality

• Manual Reset

2 Applications

• Battery-Powered Systems

• Internet of Things (IoT)

• Intruder Detection

• Tamper Detection

• Home Automation Sensors

• Thermostats

• Consumer Electronics

• Remote Sensors

• White Goods

3 Description

The TPL5010 Nano Timer is an ultra-low power timer

with a watchdog feature designed for system wake up

in duty-cycled, battery-powered applications such as

those in IoT. Many of these applications require the

use of a μC, so it is desirable to keep the μC in a low

power mode to maximize current savings, waking up

only during certain time intervals to collect data or

service an interrupt. Although the internal timer of the

μC can be used for system wake-up, it can singlehandedly

consume microamps of total system

current.

Consuming only 35 nA, the TPL5010 can replace the

functionality of the integrated μC timer. This allows

the μC to be placed in a much lower power mode,

with the internal timer off, returning only to active

mode upon an interrupt by the TPL5010. By offering

power savings of almost two orders of magnitude, the

TPL5010 enables the use of significantly smaller

batteries for energy harvesting or wireless sensor

applications. The TPL5010 provides selectable timing

intervals from 100 ms to 7200 s and is designed for

interrupt-driven applications. Some standards (such

as EN50271) require implementation of a watchdog

for safety and the TPL5010 realizes this watchdog

function at almost no additional power consumption.

The TPL5010 is available in a 6-pin SOT23 package.