5 4 E1 VDD33 E2 E4 3 VDD25 GND 2 1 REVISION HISTORY INTVCC/EXTVCC GND ECO 2 2 C14 10nF Q6 MMBT3906LT 14 RUN ASEL 16 23 WP SHARE_CLK 24 3 JP1 WP ON 15 2 R5 10K 1 OFF FREQ_CFG R42 10K 17 VOUT_CFG18 19 VDD33 VTRIM_CFG 20 VSENSE0- TSNS0 RUN0 TG1 ASEL BOOST1 WP SW1 SC BG1 ISNS1+ FREQ_CFG R32 OPT R73 OPT R24 15.8K R23 OPT R22 OPT R20 OPT VSENSE1 VOUT1_CFG VTRIM0_CFG GPIO1 VTRIM1_CFG GPIO0 5 5 1 2 3 C22 39 SW0 36 BG0 6 ISNS0+ 7 ISNS0- * * NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. INSTALL SHUNTS AS SHOWN. * * 330uF D3L VOUT R8 ADJ., MAX 40A 0 E7 + C42 D3L OPT D3L OPT GND * C38 * VSENSE0+ 1 R25 0 E8 VIN 2 R67 0 30 R56 0 31 29 SW1 32 BG1 3 ISNS1+ 4 ISNS1- Q1 4 Q2 BSC011N03LSI 4 OPT Q9 27 L1 R10 * * R1 4 C C27 10uF Q7 OPT 4 C1 100nF GND_SNS C18 10uF R7 * * 2512 R30 * R6 * + C32 C24 OPT 100uF 1210 + C11 C20 100uF 330uF 1210 D3L + C30 330uF D3L + C45 D3L OPT C44 D3L OPT R11 R45 10K 13 * C21 * 12 R12 * VDD33 C4 * R44 10K B GPIO0B FSW R1,R2 350KHz OPT -B VERSION DCR SENSE 425KHz 1.4K ASSY -A VERSION R SENSE CURRENT SENSE CONNECTIONS R7,R15 R6,R29 R30,R34 R10,R16 R11,R13 R12,R14 C21,C22 C4,C38 L1,L2 OPT 1nF OPEN 0.4uH 0 0.002 100 0 100 0 OPT 0 OPT 3 0.22uF 1.0 uF 1.4K 0 0.56uH 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 330uF D3L + C43 VOUT_SNS TECHNOLOGY HZ YI S. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC DUAL-PHASE SINGLE OUTPUT STEP-DOWN DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT SIZE 5 + C29 R14 CUSTOMER NOTICE A R29 + C10 J4 SGND AND PGND CONNECTED AT A SINGLE NODE NEAR U1 E11 C34 C25 C23 OPT 100uF 100uF R34 1210 1210 1210 1 2 3 1 2 3 37 * SGND * 2512 J3 R13 GPIO1B 41 R18 OPT ISNS1- VOUT0_CFG R15 R2 * TG0 VSENSE0- RUN1 * 5 VSENSE0+ TSNS1 B R17 10K 25 22 ISNS0- ITH0 GND VDD25 21 ISNS0+ * 1 2 3 Q5 MMBT3906LT 28 40 TSNS0 BG0 4 R16 5 PLACE Q5,Q6 NEAR L1,L2. RESPECTIVELY C12 10nF ALERT LTC3880EUJ Q10 OPT VOUT L2 1 2 3 TSNS1 C SW0 38 D Q8 OPT 4 5 5 TG0 BOOST0 U4 ITH1 4 51 2 3 26 ITH SYNC 100nF 1 2 3 11 ALERTB SDA C2 BOOST1 8 SYNC VDD33 SDA R3 4.87K VDD25 10 SCL BOOST0 BSC011N03LSI Q4 4 PGND C16 100pF 9 SCL C48 10uF 34 C15 100pF C8 4.7nF 35 R41 R57 R40 R39 10K 10K 10K 10K 33 R48 0 ITH_TP INTVCC ITH C9 C3 1uF 1uF VIN E9 R59 0 VDD33 E3 6-6-14 C28 10uF 1 2 3 GND DATE YI S. C19 10uF BSC050N03LS Q3 VDD33 APPROVED VIN 5 R63 0 DESCRIPTION PRODUCTION VIN D1 CMDSH-3TR 5 GND C17 0.22uF 1 EXTVCC_DRV BSC050N03LS C13 150uF 35V + J2 C6 D2 100nF CMDSH-3TR 1 VDD25 R52 2 VIN 6.5V - 24V R60 OPT INTVCC C5 4.7uF 0805 REV __ E10 VIN J1 D E6 1 VIN E5 N/A SCALE = NONE 2 DATE: IC NO. LTC3880EUJ DEMO CIRCUIT 1753B-A/B Monday, July 21, 2014 REV. 1 SHEET 1 1 OF 3 A 5 4 3 2 1 ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN E25 GPIO1B ALERTB SDA E13 SHARE_CLK SCL E14 E15 E16 SYNC R70 JP5 3 E17 SYNC ALERTB SDA SCL SHARE_CLK R83 D OPT GPIO1B 2 D 1 R95 E19 OPT C NC GPIO0-GPIO1 GPIO0B 0 GPIO0B D9 OPT R94 D6 OPT OPT E20 RUN 3V3 C RUN1 R96 OPT 1 FAULTB 2 CTRL 3 ALERTB 4 SDA 5 SHARE_CLK 6 SCL 7 RESETB 8 AUXP 9 UNUSED 10 UNUSED 11 GND 12 GND 13 12V 14 12V J15 DEMO HEADER (M) C50 1 100nF 2 3 4 A0 VCC A1 WP A2 SCL VSS SDA 8 AUXVCC 7 EEWP 6 EESCL 5 EESDA R84 4.99K R85 4.99K R87 R80 OPT OPT RUN1 E31 R81 OPT R82 OPT SGND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R86 OPT VIN 24LC025-I/ST B R90 0 VDD33 TO DC1613A U5 RUN E33 FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V J14 DEMO HEADER (F) C R49 10.0K SW1 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 ON 5 2 R77 10 OFF 6 3 J10 R79 3V3 0 C46 10nF 1206 VIN E21 B 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 DUAL-PHASE SINGLE OUTPUT STEP-DOWN DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 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 2 DATE: IC NO. LTC3880EUJ DEMO CIRCUIT 1753B-A/B Monday, July 21, 2014 REV. 1 SHEET 2 1 OF 3 A 5 4 3 2 1 ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN +3.3V D +3.3V TP0101K Q14 D3 GREEN GPIO0B 2 3 VOUT 1 ALERTB GND 1 Q12 2N7002A 1 GPIO0B NOTE: PULSE OUT 10mV / AMP R68 0.01 D5 ALERTB RED 2 E24 R65 30 1W 2512 OPT IOUT TST 3 E27 1 2 3 R62 10K DO NOT EXCEED 5% DUTY CYCLE! R53 200 VOUT 1 C41 0.22uF 0805 4 PULSE IN D R55 127 2 E23 J11 R38 49.9 1 2 3 4 5 Q15 RJK0305DPB 5 DYNAMIC LOAD CIRCUIT 2 VOUT C C VIN 2 5 6 7 1 ON OFF 8 + C36 C37 1uF 1206 4 NC GND 3 GND 2 GND SENSE/ADJ VIN +3.3V VIN JP4 EXTVCC_DRV 1 VIN OUTPUT LT1129CS8-3.3 C35 10uF 1206 ON OFF 1 3.3uF 3528 U6 SHDN 3 R50 1.5K 3 JP3 LED 2 R61 1.5K 5 6 U7 SHDN 7 8 B C40 1uF 1206 3V3 VIN OUTPUT LT1129CS8-5 3 C49 4.7uF 2 1 EXTVCC_DRV B 2 1 VIN GND GND SENSE/ADJ 4 VDD33 Q11 TP0101K 3 GND NC R66 10K R64 10K 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 DUAL-PHASE SINGLE OUTPUT STEP-DOWN DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 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 2 DATE: IC NO. LTC3880EUJ DEMO CIRCUIT 1753B-A/B Friday, August 29, 2014 REV. 1 SHEET 3 1 OF 3 A