ON Semi Delivers NCP1500 PWM Buck Converter

ON Semiconductor LLC (Phoenix, AZ) introduced the NCP1500, a dual-mode, pulse width modulating, (PWM) buck converter featuring a linear mode that significantly reduces noise and quiescent current at low current levels, and a PWM mode that delivers up to 91 percent efficiency for heavy loads. Designed for use within cellular baseband and digital signal processing circuitry power supplies, the NCP1500 is suitable for mobile phones; hand-held radios; lithium-ion, battery-powered devices; wireless modems; personal information appliances; portable instruments; and distributed power systems.

Operating as either a PWM buck converter or a linear regulator, the NCP1500 features a current-mode control with a cycle-by-cycle current limit; a synchronization signal between 270kHz and 630kHz; a built-in slope compensation circuit; an input-voltage range of 2.7V to 5.4V; a shutdown pin and digitally-programmable voltage selection for an output-voltage selection to 1.0V, 1.3V, 1.5V or 1.8V; and a shutdown current of 0.18µA. The device will supply in excess of 300mA to the load and is able to operate directly from a one-cell, lithium-ion battery or a three-cell, nickel-metal hydride battery.

The NCP1500 in the Micro-8, surface-mount package, is priced at $0.60 per unit in 10,000-unit quantities. Samples and production quantities are available.