5 4 3 2 1 REVISION HISTORY ECO REV __ VIN D E1 C2 2.2uF 100V 1210 6V UP TO 60V GND APPROVED DATE PRODUCTION VICTOR K. 1-08-15 INTVCC R1 VIN DESCRIPTION 2 C3 2.2uF 100V 1210 C4 2.2uF 100V 1210 C36 2.2uF 100V 1210 + CIN1 C37 2.2uF 100V 1210 R2 0 0805 + CIN2 C5 0.1uF 100V 0805 47uF/63V OPT 63HVH47M 63HVH47M R3 0 U1 LTC3892EUHF 22 E3 VIN VPRG1 ILIM DRVCC R6 0 R7 OPT R12 OPT R13 OPT E2 D INTVCC MODE FC R14 35.7K PLS SKIP R11 OPT ILIM SYNC 0 C1 OPT INTVCC R4 OPT R10 OPT 28 8 R5 0 BURST 1 3 5 2 4 6 R8 100K JP1 C6 20 PGOOD1 E4 R9 INTVCC DRVCC DRVSET 14 4.7uF 0805 3 PGOOD1 DRVUV PGOOD2 FREQ 13 1 Meg 4 PGOOD2 VOUT1 INTVCC R16 0 1 Meg R17 OPT PLLIN/MODE EXTVCC 21 EXTVCC C9 1uF 11 R21 0 R24 100k 12 20K C12 1800pF R25 7.15k C13 100pF 15 RUN1 6 R26 VOUT1 OPT R28 OPT INTVCC INTVCC C8 5 R20 OPT R29 C16 .01uF 0 R32 9 C17 1nF 10 VFB2 VFB1 ITH2 ITH1 TRACK/SS2 TRACK/SS1 RUN1 RUN2 SENSE2- SENSE1- SENSE2+ SENSE1+ 30 C14 100pF 27 7 TG2 TG1 C18 1nF 31 SW1 + + C24 10uF 35V Q3 1206 BSC036NE7NS3 G C23 OPT 1206 C25 OPT 4 Q4 OPT 3 2 1 7343 GND BG2 BG1 VIN 25 C20 2.2uF 100V 1210 BOOST2 BOOST1 0 0.1uF D1 OPT 1 4 23 24 2 R35 C22 0 0.1uF 4 VOUT1 L1 BSC057N08NS3 G 5.6uH D2 OPT DRVCC Q2 1 2 3 R34 18 5 C21 15uH 5 C31 150uF 16V VOUT2 OPT C15 R31 .01uF OPT 0 R33 26 GND 0.008 1206 C11 1800pF R27 R30 32 33 E7 12V / 5A BSC057N08NS3 G VOUT1 5 SW2 DRVCC 2 1 4 Q5 BSC036NE7NS3 G 3 2 1 VOUT2 L2 4 3 2 1 RS2 10K RUN2 5 17 5 B 0 0 16 19 Q1 R19 0 C 0 C19 VIN 2.2uF 1210 100V VOUT2 R18 R22 29 5 27pF R23 VOUT2 EXTVCC 0.1uF C10 C C7 OPT 2 0.005 1206 C27 10uF 35V 1206 Q6 OPT 4 B RS1 E8 C28 OPT 1206 C26 OPT + + 5V / 8A C32 470uF 6.3V 7343 GND E9 VIN Vin_EMI VIN L3 TP1 GND C35 C34 OPT OPT OPT C33 RUN1 OPT 1 TP2 ON GND OFF A R40 0 E11 2 VIN VIN R36 OPT 0805 RUN1 RUN2 1 ON 3 2 R38 OPT C29 OPT VIN R37 OPT 0805 RUN2 3 OFF JP2 R41 0 JP3 R39 OPT C30 OPT CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. GND E12 NOTE: UNLESS OTHERWISE SPECIFIED THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 3 2 TECHNOLOGY LT VICTOR K. 1. ALL RESISTORS AND CAPACITORS ARE 0603. 5 VOUT1 E10 1 2 3 E6 1 R15 1 2 3 VOUT2 E5 TITLE: SCHEMATIC LOW IQ DUAL OUTPUT HIGH VOLTAGE STEP-DOWN CONVERTER SIZE N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LTC3892EUHF REV. 2 DEMO CIRCUIT 1998A Thursday, January 08, 2015 SHEET 1 1 OF 1 A