5 4 3 2 1 REVISION HISTORY ECO REV __ DESCRIPTION 1 APPROVED PRODUCTION YI S. DATE 2-13-13 D D R1 VDR 0 VIN R28 17.8K SMOD# 2 4 3 VDRV 5 41 CGND GND PHASE 1 C22 VSWH VSWH VSWH PGND PGND 21 + C53 470uF + C54 470uF + + C18 C19 470uF 470uF + C20 OPT C21 OPT R10 30 1W J4 0.22uF GND C C47 100uF 1210 11 GPIO1 GPIO0 14 15 13 12 PGND 34 GND 13 GPIO1B SGND AND PGND CONNECTED AT A SINGLE NODE NEAR U2 R30 C43 100uF 1210 C46 100uF 1210 C45 100uF 1210 C44 100uF R11 R21 R12 R62 0 OPT 0 OPT E4 E6 19 20 0 1 3 2 VCIN VDRV 4 R63 OPT BG1 PWM VIN DISB# VIN NC VIN CGND VSWH GL PGND VSWH PGND VSWH U3 PGND VSWH FDMF6823A PGND VSWH PGND VSWH 21 WP 18 GPIO0B VIN C30 1uF SMOD# 27 16 R29 OPT 40 39 38 GPIO0B R16 0 37 36 L2 35 0.16uH 34 33 32 R27 825 R25 825 C36 1uF C31 100uF 1210 C32 100uF 1210 C33 100uF 1210 C34 100uF 1210 C35 100uF 1210 C49 100uF 1210 C51 100uF 1210 C52 100uF 1210 C50 100uF 1210 C48 100uF 1210 B 31 C37 0.22uF VDD25 R31 16.2k + VOUT- VSWH VSWH VSWH VTRIM1_CFG VTRIM0_CFG VOUT1_CFG 4 R15 10 PGND GPIO1B 3 17 ADDRESS: 0X4B R26 OPT BG1 12 41 18 B C15 100uF 1210 31 43 29 30 ISNS1- C26 100nF C29 22uF 1210 28 ISNS1+ FREQ_CFG 32 BOOT ASEL C28 22uF 1210 29 PGND BG1 VOUT0_CFG R66 0 C14 100uF 1210 VDR C27 1uF 16V 27 SC 31 R23 20K GPIO0B 0 CGND GND SW1 VSENSE1 ALERTB R24 10k 1uF C17 100uF 1210 VIN 30 PGND WP 21 VDD25 R22 10k R9 825 C13 100uF 1210 VOUT+ 5 41 TG1 VOUT0_CFG VDD33 R8 825 C12 100uF 1210 43 29 30 25 22 33 RUN0 VTRIM_CFG SDA FREQ_CFG SHARE_CLOCK R20 10k 32 C16 VSNSN 26 17 33 2 6 16 R19 10K SCL VOUT 0.16uH 34 VSNSP R13 20 R18 10k J3 L1 35 RUN1 19 R17 0 24 VOUT VOUT 36 1 7 SHARE_CLOCK GPIO0B 37 7 TSNS0 BOOST1 23 WP VDD33 0 BG0 GH RUN VSENSE0- 6 PHASE 14 VSENSE0+ TSNS1 36 PGND 15 ISNS0ITH0 39 PGND C25 10nF Q1 R14 6.81K ITH1 37 PGND C24 100pF 40 BG0 ISNS0+ VSWH 25 5 28 ALERT VSWH PGND R2 38 VSWH FDMF6823A PGND 24 26 ITH C23 1nF SW0 U2 LTC3880EUJ PGND 10 9 42 8 ALERTB SYNC 20 40 39 VSWH U1 VIN VIN VIN NC 11 BOOST0 38 PGND PGND 8 SYNC_A TG0 VSWH PGND C SDA 19 VDD33 10 SDA SCL VDD25 9 SCL VIN 35 18 INTVCC R7 10k 17 VDD33 GL PGND 28 VDD25 E2 GND VSWH PGND 16 27 15 CGND PGND C11 1uF VIN 26 C10 1uF GND NC PGND VDD33 14 PWM DISB# VIN PGND C9 100nF R5 OPT BG0 VIN 24 VDD25 C5 1uF VIN PGND 13 23 J2 12 C6 10uF 1 VDD33 C8 + 330uF 16V SVP 22 C7 + 330uF 16V SVP 23 R6 VIN 7V-14V 22 11 VIN J1 6 7 10 9 42 8 INTVCC VIN PGND E1 VIN VIN VIN NC INTVCC R3 10 BOOT C3 100nF GH C2 22uF 1210 R4 OPT 25 C1 22uF 1210 C4 1uF 16V VCIN VDR FREQ_CFG R32 17.4k VOUT_CFG R33 24.9k R34 4.32k R35 OPT VTRIM_CFG R36 0 NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. INSTALL SHUNTS AS SHOWN. A A 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. TECHNOLOGY HZ YI S. TITLE: SCHEMATIC HIGH DENSITY DC / DC CONVERTER WITH POWER SYSTEM MANAGEMENT SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 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. LTC3880EUJ 1 DEMO CIRCUIT 2088A Monday, May 20, 2013 1 SHEET 1 OF 2 5 4 3 2 1 ALERTB VOUT Q3 J5 1 3 E11 4 PULSE IN R39 D1 IOUT TST 1 C39 1uF 0805 R41 0.01 2512 GREEN 3 10K E12 GND TP0101K Q4 GPIO0B 10K J7 1 2 3 R38 ALERT R40 15.8K D2 2 3 4 5 GPIO0B 1 Q5 2N7002A NOTE: PULSE OUT 10mV / AMP RED R42 127 2 AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA DO NOT EXCEED 5% DUTY CYCLE! 1 2 3 4 5 6 7 8 9 10 11 12 1 ALERTB VIN 1 3V3 J6 D R37 200 2 3 4 5 C38 2.2uF 0805 2 3 Q2 RJK0305DPB +5V +5V VDD33 TP0101K 3V3 VOUT 5 D 2 VOUT DYNAMIC LOAD CIRCUIT SCL SDA TO DC1613A VIN VIN VIN SDA EESCL 5 EESDA COUT2 10uF 3 E16 1206 11 SHDN2 VOUT1 VOUT2 VOUT1 VOUT2 OFF 7 6 CBYP1 0.01uF GND BYP1 BYP2 GPIO0B COUT1 10uF 1206 CBYP2 0.01uF 1 1 12 VIN2 VIN2 13 14 VIN1 SHDN1 C ON 2 R47 OPT VDD33 8 RUN 24LC025-I/ST R48 10K R49 6.19K R50 3.4K 16 ADJ2 2 R52 2K ADJ1 SW RUN 9 1 VSS 7 6 3 JP2 LED 10 ON 2 R53 2K R51 10 OFF 3 SCL 4 E15 C55 VDR 0.1uF GND A2 OFF GND WP R46 4.99K AUXVCC 5 4 A1 8 15 R44 100K +5V 17 3 VCC 2 NC 2 A0 C40 1uF U5 LT3029IMSE 3 R45 4.99K U4 1 ON VDR 2 JP1 EXT DRIVER D3 1 100nF VIN1 R43 100K C41 C 1 VIN C42 10nF B B J8 RIGHT ANGLE HEADER GND SCL SDA GPIO RUN SHARE_CLK SYNC DNI DNI DNI J9 1 R54 0 1 2 R55 0 2 3 R56 0 3 4 R57 0 4 5 R58 0 5 6 R59 0 6 7 R60 0 7 8 8 9 9 10 10 RIGHT ANGLE SOCKET GND SCL SDA GPIO RUN SHARE_CLK SYNC DNI DNI DNI CUSTOMER NOTICE A 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. MILL MAXX 803-43-008-20-001000 MILL MAXX 802-40-008-20-001000 SCL SDA GPIO0B RUN SHARE_CLK SYNC APPROVALS PCB DES. HZ APP ENG. YI S. TECHNOLOGY TITLE: SCHEMATIC HIGH DENSITY DC / DC CONVERTER WITH POWER SYSTEM MANAGEMENT SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only N/A SCALE = NONE DATE: IC NO. REV. LTC3880EUJ 1 DEMO CIRCUIT 2088A Monday, May 20, 2013 SHEET 2 1 OF 2 A