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LDO regulator features RC pin

Posted: 28 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:Micrel? LDO regulator? MIC68200?

The new MIC68200 device from Micrel Inc. is a 2A LDO regulator designed specifically for powering applications such as FPGA or ASIC core voltages which require high start-up current with lower nominal operating current, including industrial, telecom and high-end consumer applications.

The MIC68200 operates from a wide input range of 1.65V to 5.5V, including all of the main supply voltages commonly available today. This product is designed to drive digital circuits requiring low voltage at high currents. It incorporates a delay pin (Delay) for control of power on reset output (POR) at turn-on and power-down delay at turn-off. In addition, a ramp control pin (RC) is included for either tracking applications or output voltage slew rate adjustment at turn-on and turn-off. According to Micrel, this feature is crucial in applications where the load is highly capacitive and in-rush currents can cause supply voltages to fail and microprocessors or other complex logic chips to hang up. Multiple MIC68200s can be daisy chained in either tracking or sequencing mode.

Ralf Muenster, Micrel's director of marketing for power products, said that the MIC68200 is the only device available on the market that offers an RC pin that provides control over Vin ramp rate. "The MIC68200 eliminates the need to buy higher-priced, higher-current limited devices to address current overshoot at turn-on. Many systems require complex power up protocols and the MIC68200 enables the designer to implement sequential tracking as well as ratiometric power up and power down. In doing so, it can eliminate the need for more complex power management ICs," Muenster explained.

The MIC68200 is fully protected offering both thermal and current limit protection and reverse current protection. It has a junction temperature range of -40C to 125C, and is available in fixed voltages of 1.8-, 1.5-, 1.2- and 1V. There is also an adjustable option.

The MIC68200 is offered in a 10-pin 3-by-3mm MLF package, with pricing starting at $1.63 for 1,000-unit quantities.

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