200 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 9 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

200 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 9 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

200 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 8 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

200 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 9 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

200 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 9 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

2 WDI R3 10 k 4.7 k GND 4402-DS, Rev. 5 10 F BOOT FB2 R4 5.62 k Linear Regulator Output VLIN 3.3 V 250 mA 1 F Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Ambient Operating Temperature, TA Part Number A4402ELPTR-T A4402KLPTR-T -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Rating Unit VIN1 Pin Characteristic Symbol VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V LX Pin VLX -1 to 50 V ISEN Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins NPOR Ambient Operating Temperature Junction Temperature Storage Temperature Range Notes VFBx -0.3 to 7 V VNPOR -0.3 to 6.5 V TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic Symbol RJA Package Thermal Resistance Test Conditions* On 4-layer PCB based on JEDEC standard Value Unit 34 C/W *Addit

00 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 6a 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

200 400 800 IOUT (mA) FB2 R4 5.62 k Data is for reference only. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 7 600 1000 1200 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 Selection Guide Part Number A4402ELPTR-T A4402KLPTR-T Ambient Operating Temperature, TA -40C to 85C -40C to 150C Packing 4000 pieces per 13-in. reel Package 16-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C Thermal Characteristics Characteristic

. Efficiency data from circuit shown in left panel. 4402-DS, Rev. 13 MCO-0000345 January 14, 2019 Constant On-Time Buck Converter With Integrated Linear Regulator A4402 SELECTION GUIDE Part Number Ambient Operating Temperature, TA A4402ELPTR-T -40C to 85C A4402KLPTR-T -40C to 150C Packing 4000 pieces per 13-inch reel Package 16-pin eTSSOP with exposed thermal pad ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Unit VIN1 Pin VIN1 -0.3 to 50 V VIN2 Pin VIN2 -0.3 to 7 V VLX -1 to 50 V ISEN Pin LX Pin VISEN -0.5 to 1 V ENB Pin VENB -0.3 to 7 V VO2 Pin VO2 -0.3 to 7 V WDI Pin VWDI -0.3 to 6 V TON Pin VTON -0.3 to 7 V FB1 and FB2 Pins VFBx -0.3 to 7 V NPOR VNPOR -0.3 to 6.5 V TSET Pin VTSET -0.3 to 7 V POR Pin VPOR -0.3 to 6 V BOOT Pin VBOOT VLX to VIN1+ 7 V Ambient Operating Temperature Junction Temperature Storage Temperature Range TA Range E -40 to 85 C Range K -40 to 150 C TJ(max) 150 C Tstg -40 to 150 C THERMAL CHARACTERISTICS Characteristic Package Thermal Resistance Symbol RJA Test C