5 4 3 2 1 REVISION HISTORY ECO INTVCC VIN R26 VBIAS 100K E5 INTVCC R32 OPT OPT R42 R1 75mV FLOAT OPT 100mV D R31 EXTVCC 05-02-2014 VAUX D SENSE1+ 5 C19 R2 5 OPT R12 OPT Q1 OPT 4 Q3 BSC028N06LS3 1 2 3 0 R11 D3 OPT VBIAS 5 E8 RUN 11 SS 12 C15 0.1uF E9 5 EXTVCC RUN INTVCC SS INTVCC 15 VIN PGND CIN2 4.7uF 100V 3225 CIN3 4.7uF 100V 3225 CIN4 4.7uF 100V 3225 + 63HVH33M VIN 6 - 60V * J2 GND E2 1 5 VINC 4 C17 24 Q4 BSC028N06LS3 0.1uF E3 VOUT+ VOUT J3 23 22 VOUT INTVCC C8 4.7uF 0805 10 C22 2.2uF 100V 1206 C23 2.2uF 100V 1206 COUT1 4.7uF 100V 3225 COUT2 4.7uF 100V 3225 COUT3 4.7uF 100V 3225 COUT4 4.7uF 100V 3225 COUT5 4.7uF 100V 3225 + COUT6 33uF 63V 63HVH33M + COUT7 48V / 1 - 3.0A 33uF 63V 63HVH33M J4 * GND E4 RUN VOUT- R33 150K 0805 1 ON PGND SGND VFB INTVCC PLLIN / MODE PGND 6 8 J1 CIN1 33uF 63V 25 100K 9 SGND OVMODE 3 17 1 4 ITH 2 0.006 2010 EXTVCC C16 0.1uF R35 RSNS1 SER2918H-103 0 VBIAS 21 VIN+ VIN 1 2 3 FREQ 20 E1 0.006 2010 4 1 2 3 18 2 3 14 19 TG SW PGOOD BOOST BG 16 BURST MODE (SYNC) 7 INTVCC Q2 BSC028N06LS3 R15 MODE JP1 CCM PULSE SKIP LTC3769EUF ILIM 13 INTVCC SENSE1- R5 30.1k U1 SENSE1+ R10 OPT D1 BAS170W 1 2 C4 0.1uF INTVCC RSNS2 5 1000pF R13 0 L1 10uH 2 3 1 2 3 C5 R17 10 R14 OPT 4 OPT RUN DATE VICTOR K. SENSE1- E7 GND CLKIN APPROVED PRODUCTION E6 EXTVCC C DESCRIPTION 2 0 R4 OPT 50mV 1 PGOOD REV - VOUT OVMODE 1 2 3 R34 38.3K JP2 D2 OPT C2 100pF 2 15K 3 C3 15nF R6 475K R37 OPT 0805 1 ON 0 R8 12.1K 1 VFB 5 2 3 OFF JP4 2 D4 OPT OVMODE GND 8 A R40 523K 9 7 6 10 GND SS GND ISET R39 47K * C21 22uF 16V 1206 C20 47nF 17 11 VPRG2 FBO GND JP3 220uH R41 80.6K VPRG1 12 B 1 RUN R38 OPT 3 ON SW 14 OVP OFF C18 0.1uF 100V 1206 VAUX L2 VIN AUX R3 VOUT INTVCC U2 LTC3630AEMSE VIN R9 B 16 OFF VOUT FOLLOWS VIN WHEN VIN > REGULATED VOUT CUSTOMER NOTICE NOTES: 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. 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 TECHNOLOGY LT VICTOR K. TITLE: SCHEMATIC HIGH VOLTAGE, LOW IQ, SYNCHRONOUS BOOST 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. REV. LTC3769EUF DEMO CIRCUIT 2173A Friday, May 02, 2014 SHEET 1 1 2 OF 1 A