A B C D E E2 J2 VIN R1 2.2 C3 2.2uF INTVCC 100V 1812 R3 R5 OPT OPT TP2 R13 9.76K C17 1% 4.7nF C18 47pF 0 R16 499K 1% C22 10pF TP3 R20 35.7K 1% 13 0.1uF VOUT R15 29 C12 30 12 R14 0 C19 6 33 47pF 31 INTVCC 11 R21 100K 1% 21 27 E1 14 28 INTVCC 20 R25 OPT C27 1uF TRACK/SS2 ITH1 U1 BOOST1 [2] ITH2 BG1 INTVCC SGND SGND TG2 SW2 VFB1 VFB2 BOOST2 PGND BG2 PGOOD1 SENSE2+ PGOOD2 24 23 SENSE2- EXTVCC CLKOUT PLLIN/MOD 5 2 1 0805 D1 DFLS1100 10V 15 4 R18 0 2 C21 0.1uF SW2 C6 2.2uF 100V 1812 4 R22 100 1% E6 C7 2.2uF 100V 1812 Q5 Q6 OPT 4 VOUT J7 R19 0.003 1% 2010 C23 10uF 50V 1210 C24 10uF 50V 1210 + C25 150uF 16V 16SVPC150M 2 GND J8 BSC028N06LS3 G R24 0 E8 R28 5 FCC 5 PLS SKIP 3 BURST 1 C28 OPT INTVCC 6 4 2 SYNC E9 1K 1% SW1 R29 SW1 SW2 S1 S2 SW2 100K 1% S1 JP2 E10 3 GND S2 SER2915L-103KL 18 9 VOUT J5 C15 12V@25A 150uF + 16V 16SVPC150M E7 L2 10uH MODE GND Q8 OPT 4 INTVCC 1 0805 D2 DFLS1100 10 C14 10uF 50V 1210 J6 4 16 17 C11 10uF 50V 1210 Q3 OPT E5 VIN INTVCC Q4 BSC067N06LS3 G 19 2010 5 4 C16 INTVCC C20 0.1uF 4.7uF R12 0 C26 2.2pF ILIM 1 2 3 Q2 BSC028N06LS3 G 25 TRACK/SS1 R27 0 EXTVCC SW1 TP4 VOUT R26 OPT 4 TG1 RUN2 SW1 26 VOUT 1 2 3 R9 57.6K 1% SENSE1+ RUN1 32 5 C10 OPT 8 FREQ L1 10uH SER2915L-103KL S1 R8 0.003 1% 1 2 3 TP6 SENSE1- 5 3 JP1 PGOOD 7 PHASEMD 4 1 2 3 1% R10 0 3 2 2 TP1 2 4 1 5 R7 30.1K R6 1M 0805 1 3 C5 2.2uF 100V 1812 C4 2.2uF 100V 1812 1 2 3 VIN RUN OFF Q7 OPT VIN C13 OPT E4 ON VIN Q1 BSC067N06LS3 G 22 J4 R4 100 1% 1 2 3 63HVH56M 4 5 J3 C2 2.2uF 100V 1812 5 GND + C29 56uF 63V C8 2.2pF 1 2 3 C1 56uF + 63V 63HVH56M 16V UP TO 60V R2 0 C9 1uF 100V 0805 5 J1 4 1 2 3 VIN S2 E3 GND NOTE: UNLESS OTHERWISE SPECIFIED 1 CUSTOMER NOTICE E11 1. ALL RESISTORS AND CAPACITORS ARE 0603. [2] A VERSION IC -A LTC3890EUH-2 -B LTC3890EUH 1630 McCarthy Blvd. Milpitas, CA 95035 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (408)432-1900 www.linear.com CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (408)434-0507 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. T^B`\ LTC Confidential-For Customer Use Only VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. i\Vgbe ^A TITLE: SCHEMATIC APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT POLYPHASE HIGH VOLTAGE STEP-DOWN CONVERTER PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. B C N/A SCALE = NONE D DATE: IC NO. LTC3890EUH-2/LTC3890EUH DEMO CIRCUIT 2236A-A/B SHEET 1 Friday, August 01, 2014 E REV. 2 OF 1 1