Volltext-Downloads (blau) und Frontdoor-Views (grau)

A 10mW fully integrated 2-to-13V-input buck-boost SC converter with 81.5% peak efficiency

  • In recent years, significant progress has been made on switched-capacitor DC-DC converters as they enable fully integrated on-chip power management. New converter topologies overcame the fixed input-to-output voltage limitation and achieved high efficiency at high power densities. SC converters are attractive to not only mobile handheld devices with small input and output voltages, but also for power conversion in IoE, industrial and automotive applications, etc. Such applications need to be capable of handling widely varying input voltages of more than 10V, which requires a large amount of conversion ratios. The goal is to achieve a fine granularity with the least number of flying capacitors. In [1] an SC converter was introduced that achieves these goals at low input voltage VIN ≤ 2.5V. [2] shows good efficiency up to VIN = 8V while its conversion ratio is restricted to ≤1/2 with a limited, non-equidistant number of conversion steps. A particular challenge arises with increasing input voltage as several loss mechanisms like parasitic bottom-plate losses and gate-charge losses of high-voltage transistors become of significant influence. High input voltages require supporting circuits like level shifters, auxiliary supply rails etc., which allocate additional area and add losses [2-5]. The combination of both increasing voltage and conversion ratios (VCR) lowers the efficiency and the achievable output power of SC converters. [3] and [5] use external capacitors to enable higher output power, especially for higher VIN. However, this is contradictory to the goal of a fully integrated power supply.

Download full text files

  • 1124.pdf

Export metadata

Additional Services

Share in Twitter Search Google Scholar


Author of HS ReutlingenLutz, Daniel; Renz, Peter; Wicht, Bernhard
Erschienen in:2016 IEEE International Solid-State Circuit Conference : digest of technical papers
Place of publication:Piscataway, NJ
Editor:Laura Fujino
Document Type:Conference proceeding
Publication year:2016
Page Number:3
First Page:224
Last Page:226
DDC classes:620 Ingenieurwissenschaften und Maschinenbau
Open access?:Nein
Licence (German):License Logo  In Copyright - Urheberrechtlich geschützt