5 4 3 2 1 ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN D D ALERTB SDA TP11 SHARE_CLK SCL TP12 TP13 TP14 SYNC TP15 TP16 SYNC GPIOB ALERTB SDA SCL SC R83 0 GPIOB D9 OPT TP17 RUN R79 0 3V3 C R96 OPT C50 100nF R84 4.99K U5 2 3 4 A0 VCC A1 WP A2 SCL VSS SDA R87 OPT R85 4.99K J15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DEMO HEADER (M) TP18 7 EEWP 6 EESCL 5 EESDA OPT R82 OPT C R49 10.0K SW1 RUN ON 2 5 R77 10 OFF J14 DEMO HEADER (F) VIN R81 SGND FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V R86 OPT 1206 8 AUXVCC 24LC025-I/ST R90 0 VDD33 FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V TO DC1613A 1 RUN 4 1 AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA 1 2 3 4 5 6 7 8 9 10 11 12 6 3 J10 3V3 C46 10nF VIN B B TP19 GND 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY HZ YI S. TITLE: SCHEMATIC SINGLE PHASE DC/DC CONVERTER WITH INPUT CURRENT SENSE SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 N/A SCALE = NONE 2 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. LTC3883EUH FAMILY REV. 2 DEMO CIRCUIT 1778A Monday, December 21, 2015 SHEET 2 1 OF 3 A 5 4 3 2 1 REVISION HISTORY ECO REV 1 INT/EXTVCC TP1 R1 DESCRIPTION APPROVED PRODUCTION 1 DATE 1-13-15 YI S. OPT EXTVCC_DRV R58 C1 4.7uF VDD25 VDD33 TP2 C2 100nF R2 VDD33 TP3 VDD33 R5 C5 1uF OPT C30 0.01uF 2 OFF 9 WP 19 11 1 10 PGOOD SYNC SDA ALERT 5 SYNC 20 SC IIN_SNS VIN_SNS TG WP BOOST RUN SW VOUT_CFG 15 VDD25 VTRIM_CFG TP6 VDD25 12 P1 R24 OPT R25 OPT 16 R26 P2 OPT R28 4.32K R29 OPT R30 OPT 1 BSC050NE2LS Q1 C7 10uF 4 Q2 BSC010NE2LSI OPT 4 23 TG 24 BOOST 22 SW 26 BG R14 0 C10 100nF BG VOUT L1 Q3 BSC010NE2LSI Q4 BSC011NE2LSI OPT * SHARE_CLK ISENSE+ ISENSE- 3 ISENSE+ 4 ISENSE- 4 ASEL FREQ_CFG VSENSE+ VOUT_CFG VSENSE- VTRIM_CFG TSNS 30 VSENSE+ 31 VSENSE- 32 TSNS 29 ITH R21 C17 C18 DNC DNC ITH 0.1uF * Q5 R27 * TP26 VOUT + C11 100uF R18 R17 4 C16 R15 VOUT 0.9V -1.8V 25A 2512 SYNC 33 R23 24.9K 17 C9 10uF IIN_SNS * * 1 2 3 14 2 PGOOD PGND FREQ_CFG GND 28 R19 R20 * * C12 100uF C13 100uF C14 330uF 6.3V + C15 330uF 6.3V R16 0 C TP5 VSENSE+ VSENSE+ + C28 OPT 6.3V * + C23 OPT 6.3V TP27 GND * R22 0 * TP7 VSENSE- C19 680pF 25 13 TP4 GPIO GND ASEL TP25 1uF 5 VIN TP8 GND C32 10uF D1 PGOOD SC C33 10uF C34 1uF 27 U1 LTC3883EUH 100 D 1 2 3 GPIOB RUN RUN C 8 SCL 100 5 GPIOB 3 ON 7 ALERTB ALERTB JP1 WP 6 R4 1 2 3 SDA PGOOD SCL SDA R3 C8 5 SCL TP22 R13 1K INTVCC R12 1K 21 R11 10K VDD33 R10 10K 18 R9 10K VDD25 R8 10K VIN 6.5V - 14V + C3 150uF 35V GND C6 0.1uF INTVCC R6 R7 4.99K 1K C31 0.01uF TP24 0.005 5 C4 1uF VIN VIN VIN 1 2 3 D 3 R32 10k R31 OPT VSENSE- C20 47pF PLACE Q5 CLOSE TO L1 R33 0 TP9 ITH B B * ASSY -A R SENSE -B DCR SENSE NOTE: UNLESS OTHERWISE SPECIFIED CURRENT SENSE CONNECTIONS R17 R18 OPEN OPEN 845 0 R19 L1,L2 R20 R15 R21 R27 C17 0 0 0.002 100 100 1nF OPEN 0.4uH OPEN OPEN 0 0 845 0.22uF 1.0 uF 0.55uH NOTE: FSW = 500 KHz FOR "A" VERSION FSW = 500 KHz FOR "B" VERSION C16 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. INSTALL SHUNTS AS SHOWN. 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY HZ YI S. TITLE: SCHEMATIC SINGLE PHASE DC/DC CONVERTER WITH INPUT CURRENT SENSE SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 N/A SCALE = NONE 2 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. LTC3883EUH FAMILY REV. 1 DEMO CIRCUIT 1778B Monday, December 21, 2015 SHEET 1 1 OF 3 A 5 4 3 2 1 ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN D D 5 C24 0.22uF 4 2 VOUT R51 249 2 3 4 5 D2 VSENSE- R53 10K TP0101K Q7 D4 GPIOB GND VOUT GREEN R52 30 1W 2512 OPT Q9 2N7002A 1 PGOOD R55 249 2N7002A 2 2 R54 0.05 1 ALERT RED D3 Q8 TP21 VOUT PGOOD GREEN TP28 IOUT TST 1 2 3 DO NOT EXCEED 5% DUTY CYCLE! BLEEDER LOADS R60 249 1 ALERTB GPIOB 3 PULSE IN +3.3V LED INDICATOR CIRCUITS J9 1 Q6 BSC050NE2LS +3.3V 3 DYNAMIC LOAD CIRCUIT TP20 +3.3V VSENSE+ 3 VOUT C C 5V SUPPLY FOR LTC3883-1 ONLY LED SUPPLY VIN VIN VIN JP6 LED R56 100K U3 2 5 OFF 1 6 7 8 C26 1uF SHDN NC GND GND GND SENSE/ADJ VIN U4 ON OUTPUT 2 4 5 OFF 3 C25 4.7uF 2 1 6 1 ON R57 100K 3 3 JP5 EXTVCC_DRV 7 8 EXTVCC_DRV LT1129CS8-5 C27 1uF SHDN NC GND GND GND SENSE/ADJ VIN OUTPUT 4 3 +3.3V 2 1 LT1129CS8-3.3 C29 10uF B B Q10 3V3 VDD33 TP0101K VIN 2 1 3 R61 10.0K R62 15.8K 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY HZ YI S. TITLE: SCHEMATIC SINGLE PHASE DC/DC CONVERTER WITH INPUT CURRENT SENSE SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 N/A SCALE = NONE 2 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. LTC3883EUH FAMILY REV. 2 DEMO CIRCUIT 1778A Monday, December 21, 2015 SHEET 3 1 OF 3 A