As you want to know about the the minimum CGPA required in engineering in India for an MBA in the USA so as per my knowledge Generally a 3.3 on the scale of 4.0 is considered acceptable for some of the top ranked schools in US, the requirements in certain options can go as high as 3.5

Other then CGPA other Entry Requirements for MBA in USA are:
Bachelors Degree
GMAT/GRE Score
Resume
Essay
Interview
Letter of Recommendation
Transcript
TOEFL

Top Ranked Business Schools in USA are:

Harvard University (MA)
Stanford University (CA)
University of Pennsylvania (Wharton)
Massachusetts Institute of Technology (Sloan)
Northwestern University (Kellogg) (IL)
Columbia University (NY)
University of Chicago
Duke University (Fuqua) (NC)
University of Michigan–Ann Arbor
University of California–Berkeley (Haas)
Dartmouth College (Tuck) (NH)
University of California–Los Angeles (Anderson)
University of Virginia (Darden)
New York University (Stern)
Cornell University (Johnson) (NY)
University of Texas–Austin
Yale University (CT)
University of North Carolina–Chapel Hill (Kenan-Flagler)
Carnegie Mellon University (PA)
Indiana University–Bloomington (Kelley)
Emory University (Goizueta) (GA)
University of Southern California (Marshall)
Purdue University–West Lafayette (Krannert) (IN)
Vanderbilt University (Owen) (TN)
Ohio State University (Fisher)
University of Rochester (Simon) (NY)
Washington University (Olin)
University of Minnesota–Twin Cities (Carlson)
Georgetown University (McDonough) (DC)
Michigan State University (Broad)
University of Arizona (Eller)
Arizona State University–Main Campus
Tulane University (Freeman) (LA)
Case Western Reserve University (Weatherhead) (OH)
Penn State University–University Park (Smeal)
Rice University (Jones) (TX)
Thunderbird Graduate School (AZ)
University of Maryland–College Park (Smith)
University of Wisconsin–Madison
Boston College (Carroll)
University of California–Irvine
Brigham Young University (Marriott) (UT)
Georgia Institute of Technology (DuPree)
Southern Methodist University (Cox) (TX)
Texas A&M University–College Station (Mays)
University of California–Davis
Wake Forest University (Babcock) (NC)
University of Georgia (Terry)
University of Illinois–
Urbana-Champaign
University of Notre Dame (IN)