5 D ** VEMI+ 5.5V - 42V 4 E2 FB1 L5 330 Ohm 0.22µH MPZ2012S331AT000 IHLP1212BZERR22M11 VEMI C39 0.1µF 50V 0402 E4 3 C29 10µF 50V X5R 1206 INTVcc 28 VEMI- TP1 C1 4.7µF 10V X7R 0805 VIN + TP2 CPVIN2 10µF 50V X7R 1210 C6 22µF 50V GND CPVIN1 4.7µF 50V X7R 1206 CVIN 1µF 50V X7R 0805 C36 0.1µF 50V 0402 23 37 14 C37 0.1µF 50V 0402 D INTVCC BST1 VIN SW1 FB1 R23 0 Ohm 22 PG1 PG2 11 PG3 40 12 E12 PG3 32 C31 E15 RST 21 20 TRKSS1 TRKSS1 B 1 ON 30 47nF X7R 18 2 JP4 E21 29 3 OFF C34 (Opt) C33 TRKSS2 TRKSS2 1 47nF X7R (2MHz) 19 RUN3 CPOR POREN N/C 1 R13 75.0k 1% C20 27pF 24 R14 33 150k 1% E10 VOUT4 1.2V / 1A C22 0.IµF 50V E14 0603 GND * E16 SYNC R25 0 Ohm (Opt) 31 B E18 39 POREN R19 100k 1% CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. PG2 TECHNOLOGY TITLE: SCHEMATIC SIZE JP3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 C21 47µF 10V X5R 1206 * ** 2 RUN VOUT4 C * 1. All Resistors 0603. 2. All Capacitors 0603. See Demo Manual for details on VOUT current capability. See Demo Manual for operation details. 100k 1% RUN4 3 1.0µH NPIS42LS1R0YTRF NIC Comp. Corp. 150k 1% RT R22 RUN4 EXT C17 27pF E7 VOUT3 1.8V / 1A C19 0.IµF 50V E8 0603 GND PG2 JP2 E19 R11 187k 1% C18 47µF 10V X5R 1206 C27 220pF 2 A 15 RUN4 100k 1% 1 3 VOUT3 INTVcc R21 RUN3 RUN 200k 1% NOTE: UNLESS OTHERWISE SPECIFIED. RUN3 EXT * C35 1206 (Opt) R12 L4 TRKSS2 3 JP5 E17 C14 27pF 27 R16 10.0k 1% 2 OFF R3 464k 1% C15 220µF 4V 1206 R5 L3 1.0µH NPIS42LS1R0YTRF NIC Comp. Corp. TRKSS1 E5 VOUT2 3.3V / C16 0.IµF 50V E6 0603 GND VOUT2 25 BIAS 2 ON R18 28.7k 1% FB4 RST SYNC 10 L2 2.2µH XAL5030-222MEB Coilcraft 36 * 200k 1% PG3 VOUT2 (Opt) C32 E20 R2 C11 0.1µF 50V 0402 PG2 PG4 C3 4.7pF GND PG4 SW4 GND E13 PG4 PG1 R1 806k 1% C4 47µF 10V X5R 1206 41 E11 PG2 1 GND PG1 FB3 EN/UVLO 38 R9 19.1k 1% CPVIN4 4.7µF 10V X7R 0805 GND R8 19.1k 1% VOUT4 SW3 PVIN4 GND R7 19.1k 1% VOUT3 17 35 R6 19.1k 1% E9 VOUT2 FB2 16 VOUT1 R24 0 Ohm GND CPVIN3 4.7µF 10V X7R 0805 C 13 R10 100k 1% JP1 GND 3 OFF 5 E1 VOUT1 5V / 1A C5 0.IµF 50V E3 0603 GND VOUT1 26 VOUT2 9 1% L1 4.7µH XAL5030-472MEB Coilcraft 6 SW2 7 SW2 PVIN3 GND 2 VOUT2 34 3 C2 0.1µF 50V 0402 PVIN2 8 1 EN/UVLO ON VIN 4 PVIN1 BST2 R4 340k 1 U1 LT8602EUJ#PBF VISHAY C30 10µF 50V X5R 1206 VIN 2 4 3 2 IC NO. N/A DATE: Jun 16, 2015 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 42V Quad Monolithic Step-Down Regulator with Power-On Reset LT8602EUJ DEMO CIRCUIT 1949A DC1949A_02_REV4 1 SHEET 1 REV. 4 OF 1 A