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Power/Alternative Energy??

LDOs deliver 'extremely fast' response to changing output loads

Posted: 22 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:power management? LDO? regulators? ON Semi? xx?

Bipolar LDOs from ON Semi

ON Semiconductor has introduced four new high-performance bipolar LDO regulators with output currents ranging from 0.5A to 3A and low-noise performance. The new NCP3335A, NCP5661, NCP565, NCP5662 and NCP5663 are suitable for use in networking, computing, set-top box, gaming and display applications.

These LDOs offer output voltages down to 0.9V and employ a special composite architecture that provides less than 1?s dynamic response to changing output loads. Promising industry-leading low noise performance without the need for a bypass noise reduction capacitor, the devices help reduce overall system costs and free up valuable board space. Providing low ground current independent of output load, these devices reduce power losses. In particular, the NCP3335A can sustain inputs voltages up to 16V and employs a special voltage reference and feedback mechanism that offers extremely tight output accuracies over operating conditions of load, line and temperature. Output accuracies for all the devices are from sub-1 percent at room temperature and sub-1.5 percent across the operating range of line, load and temperature conditions.

The NCP3335A is a 500mA LDO with enable. It is available with 2.5-, 2.85-, 3.3-, 5V and adjustable output voltages. Offered in a Pb-free Micro8 package, it is priced at 34 cents per unit in 4,000-unit quantities. This device is also offered in a Pb-free 3-by-3mm DFN-10 package priced at 36 cents per unit in 3,000-unit quantities. Additional voltage options in both packages are in development for release this year.

The NCP5661 is a 1A linear regulator with enable. It is available with 1.2-, 1.5-, 1.8-, 2.5-, 2.8-, 3-, 3.3V and adjustable output voltages. Offered in a Pb-free DPAK package, it is priced at 35 cents per unit in 2,500-unit quantities. Also available in a Pb-free 3-by-3mm DFN-6 package, it is priced at 53 cents per unit in 3,000-unit quantities.

The NCP565 is a 1.5A linear regulator. It is available with 1.2-, 3.3V and adjustable output voltages. Offered in a Pb-free D2PAK package, it is priced at 48 cents per unit in 800-unit quantities. Also offered in a Pb-free 3-by-3mm DFN-6 package, it is priced at 53 cents per unit in 2,000-unit quantities.

The NCP5662 is a 2A linear regulator with enable. It is available with 1.5-, 3.3V and adjustable output voltages. Offered in a Pb-free D2PAK package, it is priced at 57 cents per unit in 800-unit quantities. This device family will also be available in a 4-by-4 mm DFN package later this year.

The NCP5663 is a 3A linear regulator with enable. It available with 1.5V and adjustable output voltages. Offered in a Pb-free D2PAK package, it is priced at 61 cents per unit in 800-unit quantities.




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