▣ Title : SoC integrated LDO (iLDO) Technology

▣ Speaker

: Byeong-Ha Park(SAMSUNG)

▣ Date

& Time : Friday, September 26(2:00

~ 3:30pm)

▣ Place

: LG Research Building, Room #101

▣ Host

: Prof. Beomman Kim(T.2231)

▣ Abstract

While digital circuits and systems have enjoyed benefits of scaling, analog circuits have not enjoyed the same benefits. Rather, ever-shrinking signal range, lower device gain, poor matching, and increased substrate noise all conspired to make analog design extremely challenging. Continued scaling below 100nm brings even more difficult challenges. The dramatic increase in the gate leakage and subthreshold leakage currents, for example, may render the popular switched-capacitor circuits unworkable. Continued reduction in the power supply voltage requires higher power consumption in order to keep the same performance in the analog circuits, not to mention better performance to keep up with increased performance of digital circuits.

For the past few years, mobile industry has experienced drastic changes. Appearance of top-notch products, such as smart phones and tablet PCs as rising substitutes for the laptop PCs or desktops, expedites intelligent central processing unit for multi-tasking, namely application processor(AP), and advanced display unit, as well as large data storage capability, etc. The usage time of the mobile devices, however, has been great issue due to limited battery life span. As each end-component in the mobile devices develops, it hungers for more power, therefore claiming cutting-edge of power management techniques alongside. Power management IC (PMIC), as a core link between the battery and the various point-of-loads in the mobile application, is requested to provide more efficient, accurate, and stable power to satisfy strict specifications. Flexible supply power scaling function with efficiency-optimization is becoming a key feature of PMIC to extend the device lifetime to please end-customers.

In the first half part of this talk, I will present platform-PMIC, power delivery, and impacts of scaling on power consumption in analog circuit. In the second part, I will address AP-integrated LDO technology introduced in the mobile PMICs