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Hot-Swap Controller IC features precision current-sense output.

Press Release Summary:

Designed for 1-16 V backplanes, Model MAX5977 features integrated current-sense amplifier that provides 1% accurate current output over 10-50 mV input voltage range. Unit withstands transients or inductive spikes up to 28 V and includes VariableSpeed/BiLevel(TM) fault protection, which responds to overcurrent and short-circuit conditions, while preventing nuisance trips caused by noise or transient conditions. Housed in 20-pin TQFN-EP, device is specified over -40 to +85°C temperature range.

Original Press Release:

1V to 16V Hot-swap IC with Precision Current-sense Output

Maxim's new hot-swap controller, the MAX5977, integrates a current-sense amplifier to facilitate current monitoring in high-availability systems.

SUNNYVALE, CA - Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX5977, a hot-swap controller for 1V to 16V backplanes. This device features an integrated current-sense amplifier that provides a 1% accurate current output over a 10mV to 50mV input voltage range. This allows system designers to precisely monitor/measure load current in high-availability systems. A calibration mode allows the current-sense amplifier to be fine-tuned for production testing of the design. The MAX5977 is well suited for networking, base station, storage, and computer server line cards requiring high reliability and precision current monitoring.

The MAX5977 allows line cards to be safely inserted and removed from a live backplane without causing glitches on the system power-supply rail. It is rated for 1V to 16V input and can withstand transients or inductive spikes up to 28V. An integrated charge pump drives a low-cost, external n-channel MOSFET. VariableSpeed/BiLevel(TM) fault protection improves system reliability by quickly responding to overcurrent and short-circuit conditions, while preventing nuisance trips caused by noise or transient conditions. The MAX5977A latches off after a fault condition, while the MAX5977B automatically restarts. Other features include: programmable undervoltage and overvoltage protection, an active-high power-good (open-drain) output, and an active-low (open-drain) fault output.

The MAX5977 is packaged in a 20-pin TQFN-EP and is fully specified over the -40 degrees Celsius to +85 degrees Celsius extended temperature range. Prices start at $1.51 (1000-up, FOB USA).

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 6400 products serving the industrial, communications, consumer, and computing markets.

Maxim reported revenue of approximately $2.0 billion for fiscal 2010. A Fortune 1000 company, Maxim is included in the Nasdaq 100, the Russell 1000, and the MSCI USA indices. For more information, go to

VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc.

DATA SHEET: A Data Sheet for this product is available on the web.

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