Micropower Precision Triple Supply Monitor Guaranteed over High Temperatures for Automotive Applications

Ismaning, (PresseBox) - Linear Technology introduces the LTC1728H-5, a tiny, accurate triple supply voltage monitor that guarantees operation across -40°C to 125°C. The LTC1728H-5 monitors 5V, 3.3V and one adjustable trip threshold set with an external resistive divider network, giving users the flexibility to monitor voltages as low as 1V. Offered in a tiny 5-lead SOT-23 package, the LTC1728 is the smallest triple supply monitor available. Drawing only 10uA (typ) from the supplies it monitors, the LTC1728H-5 provides a low power, reliable solution for high temperature, space-limited applications.

The LTC1728 offers a tight 1.5% threshold accuracy over which reset can occur, decreasing the overall voltage margin required for reliable system operation. This, along with power supply glitch filtering, a feature shared by Linear Technology's entire family of dual, triple, quad, hex and octal supply monitors, ensures predictable reset operation without false triggering. Whenever one of the three monitored voltages falls below its threshold, a common open-drain reset output asserts and remains low until all three supplies are in compliance for at least 200ms.

Summary of Features: LTC1728H-5

- Monitors Three Inputs Simultaneously: 5V, 3.3V & ADJ
- Guaranteed Threshold Accuracy: ±1.5%
- Very Low Supply Current: 10uA (typ)
- 200ms Reset Delay Time
- Active Low RESET Output
- Power Supply Glitch Immunity
- Automotive Temperature Range: -40°C to 125°C
- 5-Lead SOT-23 Package

LINEAR TECHNOLOGY GmbH

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, uModule(TM) products, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com.

LT, LTC, LTM, Burst Mode and are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.

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