National Semiconductor Corp. (Santa Clara, CA) launched two new switching regulators tailored for high-voltage power supply designs for communications, industrial and automotive applications. By combining advanced high-voltage processes, chip-scale packaging and proprietary circuitry, the LM5000 and LM5030 integrated switching regulator ICs operate from 10V to more than 100V.
The LM5000 is a fully integrated, current-mode, pulse-width modulation (PWM) dc/dc regulator that operates with a wide range of input voltages between 3.1V and 40V. A built-in 80V power DMOS transistor is rated up to 2A peak with a channel resistance of 200mW. The versatile LM5000 operates at user-selectable frequencies up to 1.25MHz. The LM5000 offers high-density, high-efficiency power conversion solutions in telecommunications, automotive, networking, industrial and battery-powered applications.
The LM5030 is a 100V, high-frequency, current-mode, dc-dc PWM controller with all the features to implement state-of-the-art push-pull and bridge topologies. Suitable for powering communications equipment such as central office switches, DSL access multiplexers, high-availability systems and 48V distributed power systems, the LM5030 integrates an internal 100V startup regulator in a thermally enhanced chip-scale package.
The LM5000 switching regulator in an TSSOP-16 or LLP-14 package is priced at $2 each in 1,000-piece quantities. The LM5030 PWM controller in an MSOP-10 or LLP-10 package is priced at $1.85 each in 1,000-piece quantities. The LM5030 and LM5000 are available for sampling now with volume production in May and June, respectively.
