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|Type:||Artigo de evento|
|Title:||A Compact Fast-response Charge-pump Gate Driver|
De Lima J.A.
|Abstract:||This paper presents a compact charge-pump gate driver (CPGD) that dynamically adjusts the driving gate-source voltage VGS-SW of on-chip power switches, following stringent load transients in amplitude and duration. Owing to its simple topology, the CPGD responsively sustains regulation of the charge-pump (CP) output voltage VOUT within the range [2.4V, 3.0V], without impairing power consumption. Contrary to driving techniques that depend on the settling of VOUT before adjusting VGS-SW, the CPGD instantaneously compares VOUT to a reference VREF and optimally sets the rail voltage for the switches. The circuit shows low sensitivity with switching frequency fsw across a broad range [50KHz ≤ fsw ≤ 1MHz]. Simulations with PSPICE and Bsim3v3 models attest the circuit performance. The entire CP regulator was prototyped on a standard 0.35μm CMOS fabrication process, with the CPGD occupying an area of only 0.014mm2. At extremes scenarios of a light and heavy load current ILOAD, good transient response is observed. From simulation, for a 20μs-step in ILOAD from 0 to 20mA, the CPGD takes only 20μm to elevate VGS-SW from 1.0V to 4.75V. Experimental results match closely this expectation. The CPGD features consumption below 475μW and complies with a low-voltage supply, such as 1.5V-batteries. Copyright 2009 ACM.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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