Product category:
Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IRU3039
Edited by the Electronicstalk Editorial
Team on 09 October 2003
PWM controller makes good sense
A new PWM control IC features built-in lossless current sensing and overcurrent protection to simplify circuits and maximise efficiency as external sense resistors are not needed.
A new PWM control IC from International Rectifier features built-in lossless current sensing and overcurrent protection to simplify circuits and maximise efficiency as external sense resistors are not needed The IRU3039 is designed for a wide range of compact, high performance synchronous buck regulator applications used in DDR memory circuits, computer graphics cards, hard disk drives, network computer and server power supplies and onboard DC/DC convertors
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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In DDR memory circuits, the new IRU3039 can be used to provide both the core voltage (VDDQ) and termination voltage (VTT).
Overcurrent protection is achieved by monitoring the synchronous mosfet on-resistance, enhancing convertor efficiency and reducing cost by eliminating the current sense resistor.
The onboard regulator cuts component count, while an internal linear regulator enables a compact and flexible solution for single supply up to 18V applications.
The single output voltage can be programmed as low as 0.8V for low-voltage applications.
The IRU3039 features programmable switching frequency up to 400kHz, which can shrink circuit size with smaller inductors and output capacitors.
Other features include a capacitor-programmable soft-start function, an uncommitted error amplifier available for DDR voltage tracking applications and a 0.8V precision reference voltage with 2% output voltage accuracy over the entire operating temperature range.
The IRU3039 is packaged in 20-pin MLPQ, allowing for both small size and good thermal characteristics for high frequency as well as high input supply applications.
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