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Nano-power system timers replace MCU's internal timer

Posted: 23 Aug 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? system timers? standby power? sleep mode?

Texas Instruments recently unveiled two programmable system timers that claim to significantly reduce system standby power consumption. The TPL5000 with watchdog timer and TPL5100 with MOS driver both draw only 30nA of current. They also replace a microcontroller's (MCU's) internal timer, allowing the MCU to remain in low-power sleep mode.

The nano timers address a wide range of battery-powered and energy harvesting systems, including smoke alarms, CO alarms, intelligent price tags, occupancy sensors, security cameras, door locks, wireless sensor nodes and data loggers. In these applications, the main system is in sleep mode or power-down mode most of the time, which makes the power consumption of the MCU internal timer significant. By drawing much lower current than an MCU timer, the TPL5000 and TPL5100 greatly reduce power consumption and extend the operating life of these systems.

The evaluation modules (EVMs) are available and allow designers to configure the TPL5000 and TPL5100's delay timers and measure their ultra-low current consumption. The EVMs connect directly to the MSP430, Tiva C Series and C2000 Piccolo LaunchPads to test their watchdog timer and power cycling features. IBIS models are also available for the TPL5000 and TPL5100 to verify signal integrity. The TPL5000 and TPL5100 are available in 10-pin, 3x5mm VSSOP packages.

For more information on the TPL5000, visit www.ti.com/tpl5000-pr.





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