ON Semiconductor unveils CMOS linear voltage regulators

By siliconindia   |   Thursday, 01 April 2010, 19:07 IST
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Bangalore: ON Semiconductor, a supplier of silicon solutions for green electronics has extended its product portfolio, with the introduction of five new CMOS linear voltage regulator families. According to the company, the NCP69x families are optimized for use in low current consumption portable battery-powered and 'always on' applications such as cable modems, satellite receivers, digital-set-top boxes and electricity meters. The NCP690, NCP691, and NCP692 are Very Low Dropout (VLDO) 1 A regulator devices available with an adjustable output voltage from 5.0V down to 1.25V or in fixed voltage versions. The devices offer a power supply rejection ratio (PSRR) of 62dB, low quiescent current (145 uA typical) and low noise (50Vrms) operation, as well as short circuit and thermal protection. They have enhanced electro-static discharge (ESD) protection of 4kV compared to standard CMOS LDOs and are designed to be utilized with low cost ceramic capacitors. The NCP691 includes an enable-low function, while the NCP692 has an enable-high function. The NCP693 1 A regulator operates with a supply current of only 65A at no load, and a standby mode with a supply current less than 0.15A, selected by a chip enable pin. Standard voltage versions are 0.8 V, 1.0 V, 1.2 V, 2.5 V and 3.3 V. This series is complemented by the NCP694, which is an Ultra Low Dropout (ULDO) 1 A regulator for applications where there is a small differential between the input and output voltage. It offers -3 mV (typical) load regulation, and a 60A (typical) quiescent current. A ripple rejection of 70 dB (typical), along with a current limit and thermal protection makes this a very robust and versatile device. It is available in an adjustable version with a minimum output voltage of 1.0 V, and in fixed voltage options of 0.8 V, 1.0 V, 1.2 V, 2.5 V, and 3.3 V. "With greater emphasis being placed on energy efficient designs, engineers need to be able to specify lower voltages," says Mike Paquette, Director of the Regulation Business Unit at ON Semiconductor. The NCP690, NCP691 and NCP692 are all offered in 6-lead, 3 mm x 3 mm DFN packages. The NCP693 comes in a 1.8 mm x 2.0 mm DFN package. The NCP694 is housed in 6-pin HSON and 5-pin SOT-89 packages. Depending on the device and the package selected, prices range from $0.41 to $0.55 in 10,000 unit quantities.

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