Paper Info
Title
A Bootstrap circuit for DC-DC converters with a wide input voltage range in HV-CMOS
Abstract
Bootstrap circuits are essential parts of integrated DC-DC converters with an NMOS transistor as high-side switch, which provide voltage overdrive for the gate drivers and to drive the high-side switch's gate. This paper presents a bootstrap circuit which doesn't need an additional supply voltage for charging the bootstrap capacitor to a desired voltage level, but uses the input voltage of the converter. Other advantages of this circuit are proper operation over a wide range of duty ratios and input voltages (from 7.5 V to 45 V). The circuit is designed in 0.18 μm 50 V high-voltage (HV) CMOS technology as part of a buck DC-DC converter for a high output power. Post layout simulations show a voltage dip lower than 80 mV when the high-side NMOS transistor is switched on and the power loss of the bootstrap circuit equal to 160 mW for nominal conditions (input voltage 36 V, duty ratio 15%, bootstrap voltage 4.8 V, input power of drivers 115 mW). The layout dimensions of the bootstrap circuit are 96 μm × 251 μm.
Year
DOI
Venue
2016
10.1109/MIPRO.2016.7522111
2016 39th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO)
Keywords
Field
DocType
bootstrap voltage,power loss,post layout simulations,buck DC-DC converter,bootstrap capacitor,high-side switch gate,gate drivers,voltage overdrive,NMOS transistor,integrated DC-DC converters,HV-CMOS technology,bootstrap circuit,voltage 7.5 V to 45 V,size 0.18 mum,voltage 50 V,power 160 mW,voltage 4.8 V,power 115 mW,size 96 mum,size 251 mum
NMOS logic,Computer science,Overdrive voltage,CMOS,Voltage regulation,Voltage multiplier,MOSFET,Electronic circuit,Electrical engineering,Voltage divider
Conference
ISBN
Citations 
PageRank 
978-1-5090-2543-5
0
0.34
References 
Authors
3
3
Name
Order
Citations
PageRank
Natasa Mitrovic100.34
Reinhard Enne284.01
Horst Zimmermann32915.60