Exhibit 21.1

MICROCHIP TECHNOLOGY INCORPORATED

LIST OF SIGNIFICANT SUBSIDIARIES

Atmel Corporation

Jurisdiction: Delaware

Atmel Holdings, Inc.

Jurisdiction: Delaware

Microchip Holding Corporation

Jurisdiction: Delaware

Microchip Technology (Thailand) Co., Ltd.

Jurisdiction: Thailand

Microchip Technology (Barbados) II Incorporated

Jurisdiction: Cayman Islands

Microchip Technology Ireland Limited

Jurisdiction: Ireland

Microchip Technology Malta Limited

Jurisdiction: Ireland