Product category:
Power Supply ICs and Controllers
News Release from: National Semiconductor | Subject: LM2633 and LM2645
Edited by the Electronicstalk Editorial
Team on 06 April 2001
All-in-one embedded power system on a
chip
National Semiconductor has released two integrated power management controllers for embedded applications, each offering a complete power supply for any MPU, FPGA or DSP-based system.
National Semiconductor has released two highly integrated power management controllers for embedded applications, offering a complete power supply for any microprocessor, FPGA or DSP-based system in one compact device National's new high-efficiency synchronous step-down regulator controllers have multiple outputs that can power notebook computers, networking equipment, internet appliances, set-top boxes, graphics cards including DDR memory, and industrial computer boards
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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The LM2633 and LM2645 combine all the blocks needed to create a PCB-level power supply that can operate over an input range of 4.5 to 30V with maximum efficiency.
With their wide input voltage range, 10uA shutdown current, and superior performance, these controllers meet the needs of portable and line-powered systems.
"Multiple IC process technologies dictate more and varied power sources in computer-based system design", said Monika Abele, Product Marketing Engineer Power Management, Europe.
"National is the only company that combines this level of functionality and performance into one competitively-priced package".
The LM2633 combines two switching controllers and a linear controller.
The LM2645 combines all the features of the LM2633 plus a 3.3V/50mA linear regulator.
The synchronous switching controllers can operate out of phase, thereby decreasing the input peak current.
This technique results in significant cost savings by reducing the number of capacitors required to operate this supply.
The two switching channels can also operate in parallel to create a two-phase controller for higher power density and lower system noise.
A low-current 3.3V linear regulator and an adjustable linear controller provide the additional voltages for standby, bias or any other system need.
The LM2633MTD and the LM2645 are offered in National's 48-pin TSSOP.
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