93.89% Peak Efficiency 24V-to-1V DC-DC Converter with Fast In-Situ Efficiency Tracking and Power-FET Code Roaming

This paper presents a high-efficiency 24V-to-1V buck converter featuring two techniques to improve efficiency and reliability. First, we propose a fast in-situ efficiency tracking technique, which helps to maintain high power efficiency across load conditions and process, voltage, and temperature va...

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Bibliographic Details
Main Authors: Wang, Zhaoqing, Li, Mao, Kim, Suhwan, Desai, Nachiket, Krishnamurthy, Ram K., Lazaro, Orlando, Blanco, Andres, Zhang, Xin, Seok, Mingoo
Format: Conference Proceeding
Language:English
Subjects:
Buck converters
code roaming
Codes
DC-DC converter
Degradation
efficiency tracking
Europe
Field effect transistors
gradient descent
LUT-based control
reliability enhancement
Resistance
Voltage
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Summary:This paper presents a high-efficiency 24V-to-1V buck converter featuring two techniques to improve efficiency and reliability. First, we propose a fast in-situ efficiency tracking technique, which helps to maintain high power efficiency across load conditions and process, voltage, and temperature variations. Second, we propose a power-FET code roaming technique to avoid excessive aging on specific segments. The proposed converter was fabricated in a 180nm BCD process, achieving a peak power efficiency of 93.89% at 405-mA load current. The tracking technique demonstrates an efficiency improvement of up to 34.74% compared to the baseline without efficiency tracking. In addition, the roaming technique slows down the on-time resistance degradation by 5.8X.
ISSN:2643-1319
DOI:10.1109/ESSCIRC59616.2023.10268730