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

c/o Walkers Corporation Services Limited

Walker House

87 Mary Street

George Town

Grand Cayman KY1-9005

Microchip Technology Ireland Limited

Block 3.1

Woodford Business Park

Northern Cross

Santry

Dublin 9 Ireland