Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPS310x family
Edited by the Electronicstalk Editorial
Team on 21 September 2001
Supervisors stay alert down to 0.4V
A new family of supply-voltage supervisors from Texas Instruments monitor supply voltages from 0.55 to 3.3V and guarantee a valid reset pulse even if the supply voltage falls to 0.4V
A new family of supply-voltage supervisors from Texas Instruments monitor supply voltages from 0.55 to 3.3V and are the industry's first to guarantee a valid reset pulse even if the supply voltage falls to 0.4V With processor core voltages dropping steadily, in some cases below 1V, supervisory circuits that monitor processor operation also must work at lower voltages
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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TI's TPS310x family of supply-voltage supervisors is the first true sub-1V family of devices that meets the low voltage needs for portable applications.
The TPS310x devices guarantee a valid reset pulse, even if their own supply voltage drops to as little as 0.4V.
Other features of the TPS310x family are its 1.2uA (typical) supply current and ???0.75% trip-point accuracy, making the device beneficial for battery-powered applications.
Among the wide range of TPS310x family ICs are devices that monitor processor execution (watchdog input), check battery voltages (PFI input) or additional supply rails (SENSE input) and offer open-drain or push-pull output circuits.
Specifically, the TPS3103 and TPS3106 devices have active-low, open-drain outputs, while the TPS3110 has an active-low, push-pull output.
In operation, the TPS310x voltage supervisors assert a reset signal whenever the supply voltages, VDD, exceeds 0.4V.
Thereafter, the device monitors VDD, keeping the reset output active as long as it remains below the threshold voltage, VIT.
Moreover, to ensure proper system reset, an internal timer delays the output's return to an inactive state once VDD exceeds VIT.
Other key features of the TPS310x family include its low supply current, accurate trip point, and wide range of trip-voltage and reset-pulse options.
The TPS310x family of low-voltage supervisory ICs is available now in SOT23 packages and is rated for operation from -40 to +85C.
Suggested resale pricing starts at $0.86 each in quantities of 1000.
Currently, devices are available with trip points of 0.9 and 3.3V.
Beginning in October, additional trip points will be available including 1.2, 1.5, 1.6 and 2.0V.
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