ADP165/ADP166Data Sheet12VINVOUTAADP165/ADP166BENGND 008 TOP VIEW(Not to Scale) 12188- Figure 8. 4-Ball WLCSP Pin Configuration Table 9. 4-Ball WLCSP Pin Function Descriptions Pin No.MnemonicDescription A1 VIN Regulator Input Supply. Bypass VIN to GND with a 1 µF or greater capacitor. B1 EN Enable Input. Drive EN high to turn on the regulator; drive EN low to turn off the regulator. For automatic startup, connect EN to VIN. A2 VOUT Regulated Output Voltage. Bypass VOUT to GND with a 1 µF or greater capacitor. B2 GND Ground. Rev. A | Page 8 of 23 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS RECOMMENDED SPECIFICATIONS: INPUT AND OUTPUT CAPACITORS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION CAPACITOR SELECTION Output Capacitor, COUT Input Bypass Capacitor, CIN Input and Output Capacitor Properties ENABLE FEATURE UNDERVOLTAGE LOCKOUT (UVLO) CURRENT-LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PCB LAYOUT CONSIDERATIONS LIGHT SENSITIVITY OF WLCSPs OUTLINE DIMENSIONS ORDERING GUIDE