Here is the abstract you requested from the IMAPS_2009 technical program page. This is the original abstract submitted by the author. Any changes to the technical content of the final manuscript published by IMAPS or the presentation that is given during the event is done by the author, not IMAPS.
|A High-Temperature, High-Voltage Linear Regulator in 0.8-µm BCD-on-SOI|
|Keywords: High Temperature Electronics, Linear Voltage Regulator, SOI|
|Voltage Regulator is an essential analog block of analog integrated circuit, the function of voltage regulator is to provide a noiseless and stable output voltage regardless of load current variation. The demand of high temperature electronics has been predicted having almost a factor of 10 increment in the past decade, demand of automotive electronics contribute 70% of total demand of high temperature electronics, however, very few high temperature voltage regulators are available, this research presents a high temperature linear voltage regulator targeted for automotive application, the off-chip discrete components can be minimized by using linear regulator approach. SOI (Silicon-On-Insulator) fabrication process technology offers a better solution for analog electronic operates at elevated temperature by suppressing leakage current, nevertheless, a temperature stable reference current is extremely important for biasing error amplifier, a temperature stable current biases error amplifier will maintain the power consumption, dc open loop gain and stability across the wide temperature range, this work also presents a on-chip temperature stable current reference for biasing error amplifier, Both error amplifier and voltage regulator will benefit from the temperature stable current reference. The linear voltage regulator consists of a 2.2V bandgap voltage reference circuit, error amplifier (folded-cascode OTA), voltage buffer, feedback resistor, frequency compensation circuit, temperature stable current reference circuit, Shunt Pre-Regulator and a HV NMOSFET Pass Transistor. A prototype of high temperature linear regulator is designed, fabricated in a commercially available BCD-on-SOI process (0.8-micron, 2-poly and 3-metal). The design supports an input dc power supply voltage range of 10 V to 45 V and maximum operating temperature of 175°C. The linear regulator provides an output voltage of 5.3 V at room temperature and can supply a maximum output load current of 200 mA, the output voltage of this regulator will supply the lower-side buffer of Gate-Driver circuit.|
|Chiahung Su, Graduate Research Assistant
University of Tennessee