Santa Clara, Calif.National Semiconductor Corp.'s four new high-voltage, non-synchronous buck controllers feature a high input voltage range, high-performance pulse width modulation (PWM) control and reduced electromagnetic interference (EMI).
Well-suited for a variety of telecom, networking and industrial infrastructure applications, the buck controllers power sensitive, low-voltage circuitry from high input voltages. The controllers feature 85 percent peak efficiency when powering low voltage loads from a high voltage supply, positioning them among National's PowerWise family of energy-efficient products.
The LM5085, LM25085, LM5088 and LM25088 buck controllers feature an input voltage range up to 75V and can regulate output voltages as low as 1.2V at load currents in excess of 5A. Each offers programmable switching frequency up to 1 MHz using a single resistor, enabling the designer to optimize the design based on varying size and efficiency constraints. The LM5085 and LM5088 operate from input voltages up to 75V, and the LM25085 and LM25088 have a maximum input voltage of 42V.
National Semiconductor, www.national.com