ADP124/ADP125Data SheetPIN CONFIGURATIONS AND FUNCTION DESCRIPTIONSVOUT18VINVOUT18VINVOUTADP12427VINVOUTADP12527VINTOP VIEWTOP VIEWVOUT SENSE 36NC(Not to Scale) 3 ADJ36NC 4 (Not to Scale) -00 -00 GND45ENGND 6 5EN 476 4 47 08 08 NOTESNOTES1. NC = NO CONNECT.1. NC = NO CONNECT.2. THE EXPOSED PAD MUST BE CONNECTED TO GROUND.2. THE EXPOSED PAD MUST BE CONNECTED TO GROUND. Figure 3. ADP124 Fixed Output MSOP Pin Configuration Figure 5. ADP125 Adjustable Output MSOP Pin Configuration VOUT 18 VINVOUT 18 VINVOUT 2ADP1247 VINVOUT 2ADP1257 VINTOP VIEWTOP VIEWVOUT SENSE 3(Not to Scale)6 NCADJ 3(Not to Scale)6 NC 5 10 06 6- -1 GND 45 ENGND 45 EN 76 847 0 084 NOTESNOTES1. NC = NO CONNECT.1. NC = NO CONNECT.2. THE EXPOSED PAD MUST BE CONNECTED TO GROUND.2. THE EXPOSED PAD MUST BE CONNECTED TO GROUND. Figure 4. ADP124 Fixed Output LFCSP Pin Configuration Figure 6. ADP125 Adjustable Output LFCSP Pin Configuration Table 5. Pin Function Descriptions MnemonicPin No.ADP124ADP125 Description 1 VOUT VOUT Regulated Output Voltage. Bypass VOUT to GND with a 1 μF or greater capacitor. 2 VOUT VOUT Regulated Output Voltage. Bypass VOUT to GND with a 1 μF or greater capacitor. 3 VOUT SENSE N/A Feedback Node for the Error Amplifier. Connect to VOUT. N/A ADJ Feedback Node for the Error Amplifier. Connect the midpoint of an external divider from VOUT to GND to this pin to set the output voltage. 4 GND GND Ground. 5 EN 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. 6 NC NC No Connect. This pin is not connected internally. 7 VIN VIN Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor. 8 VIN VIN Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor. EPAD EPAD The exposed pad must be connected to ground. Rev. D | Page 6 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS RECOMMENDED CAPACITOR SPECIFICATIONS 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 Input Bypass Capacitor Input and Output Capacitor Properties UNDERVOLTAGE LOCKOUT ENABLE FEATURE CURRENT LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS JUNCTION TEMPERATURE CALCULATIONS PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE