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Power managers support hot swap, sequencing apps

Posted: 04 Dec 2009 ?? ?Print Version ?Bookmark and Share

Keywords:power manager? power management? hot swap application?

Power Manager II

Lattice Semiconductor has expanded its second generation Power Manager II product family with two new higher-performance devices. Both the ispPAC-POWR1014-2 and ispPAC-POWR1014A-2 devices integrate higher voltage charge pumps with programmable current to control MOSFETs in hot swap and sequencing applications.

The new devices are pin compatible with existing Power Manager II devices, and integrate power management functions that typically require multiple ICs, including hot swap controllers, reset generators, voltage supervisors, sequencers and trackers. The ispPAC-POWR1014A-2 device also replaces ADC ICs used for power supply voltage measurements, controlled through a standard I?C interface.

"Compared to the cost of traditional single-function ICs, customers currently save up to 30 percent when using our Power Manager II devices to integrate power management functions in a board with six or more power supplies," said Shyam Chandra, Lattice's product marketing manager for mixed-signal devices. "Now, with the integration of hot swap functionality, these new, higher-performance Power Manager II devices can save our customers up to 40 percent."

The POWR1014-2 device integrates a 24 macrocell ruggedized PLD and dual-precision voltage monitoring comparators with an accuracy of 0.3 percent. The POWR1014A-2 device also integrates a 10bit ADC for voltage measurements and an I?C interface that enables a microcontroller to read the status of all the comparators, inputs as well as outputs. Both the POWR1014-2 and POWR1014A-2 devices have been ruggedized to operate across a wide range of power supply voltages from 2.8V to 3.96V. These higher performance devices generate up to 12V using the on-chip charge pump, enabling integration of 5V hot swap controllers using MOSFETs with higher gate threshold voltages.

The ispPAC-POWR1014-2, due to its low cost and very small footprint, is suited to provide a complete board power management solution in consumer, telecom and automotive applications, including customer premises equipment, plasma display panel TVs and in-cabin multimedia. The POWR1014A-2 device addresses applications such as advanced mezzanine cards, PrPMC, base station line cards, Edge router line cards and servers that require power supply voltage measurement in addition to standard power management functions.

Designs for the ispPAC-POWR1014-2 and the ispPAC-POWR1014A-2 devices are implemented using the Windows-based Lattice PAC-Designer Software, Version 5.2.

High volume (250K+) pricing for the ispPAC-POWR1014-2 devices in the 48-pin TQFP package and industrial temperature range is $1.95, with the ispPAC-POWR1014A-2 devices priced 10 percent higher. Samples are available now.

- Henri Arnold
EE Times Europe





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