Exhibit 21.1

MICROCHIP TECHNOLOGY INCORPORATED

LIST OF SIGNIFICANT SUBSIDIARIES

Microchip Technology (Thailand) Co., Ltd.

14 Moo 1, T. Wangtakien

A. Muang Chacherngsao

Chacherngsao 24000

Thailand

Microchip Technology (Barbados) II Incorporated

190 Elgin Avenue

George Town

Grand Cayman

Cayman Islands KY1-9005

Microchip Technology Ireland Limited

Block 3.1

Woodford Business Park

Northern Cross

Santry

Dublin 9 Ireland