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LDO regulators source up to 300mA output currents

Posted: 04 Jul 2007 ?? ?Print Version ?Bookmark and Share

Keywords:low dropout regulator? LDOs?

Catalyst Semiconductor Inc. has announced two additions to its recently released low dropout (LDO) regulator product line. The CAT6217 and CAT6218 LDO regulators source 150mA and 300mA output currents, respectively, in a five-lead, 1mm profile SOT-23 package.

The CAT6217 and CAT6218 are alternatives to LDO regulators from National Semiconductor, Micrel, Maxim and others. These devices offer a low quiescent current combined with a low typical dropout voltage of 90mV at a 150mA load for the CAT6217 and 180 mV at a 300 mA load for the CAT6218.

In addition, an external bypass capacitor reduces overall output noise making the devices suitable for low noise applications. Many LDOs incorporating a bypass capacitor pay the penalty of slow "start up," however; Catalyst explained the CAT6217 and CAT6218 LDO products are designed with a "quick start" feature to ensure a fast turn-on time of less than 150 us, further optimizing the devices for low-power applications.

The CAT6217 and CAT6218 eliminate battery drain when not in use by entering a "zero" current shutdown mode. They also offer a low typical quiescent current of 55?A and protection against short-circuit and thermal overload fault conditions.

The CAT6217 is available in output voltages of 1.5V, 1.8V, 2.5V, 2.8V, 2.85V and 3.3V. The CAT6218 offers output voltages of 1.8V, 2.4V, 2.7V, 2.85V, 3V, 3.2V and 3.3V.

The CAT6217 LDO regulator is priced at 20 cents each and the CAT6218 is priced at 23 cents each, both in quantities of 10,000. Samples are available now. Projected lead time for production quantities is six to eight weeks ARO.

- Gina Roos

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