5 4 3 2 1 REVISION HISTORY ECO REV __ DESCRIPTION 1 COMP1a PRODUCTION APPROVED JIAN L. DATE 6-2-14 VOUT1 J6 C1 2200pF COUT1 100uF 1210 R2 4.99K D 0.035 VIA TESTPOINTS E2 R5 0 R4 0805 OPT P1 R6 OPT CIN1 + 150uF 35V J9 CIN2 10uF 1210 CIN3 10uF 1210 CIN4 10uF 1210 GND E5 GND R9 0 F11 F12 R3 0 E1 VOUT1_SNS E3 J1 J2 J3 K1 K2 K3 L1 L2 L3 M1 M2 M3 INTVCC VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 J9 COUT4 330uF 6.3V 6TPF330M9L + C17 OPT H9 J8 COUT3 100uF 1210 D VOSNS1 VORB1 COMP1b J5 K5 H2 H1 G2 G1 L10 M5 H8 COMP1a TSNS1a VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 TSNS1b A11 A12 B11 B12 C11 C12 D11 D12 E12 CIN5 10uF 1210 ISNS1a+ ISNS1b+ * ISNS1aISNS1b- J10 VIN 4.5V - 26.5V SW1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VIN SNUB1 H12 J11 J12 K11 K12 L11 L12 M11 M12 VIN COUT2 100uF 1210 VOSNS1 P2 GND E4 VOUT1 1.8V / 13A C2 OPT R7 J5 0 GND INTVCC INTVCC F9 G9 R8 INTVCC OPT VIN E7 GND1_SNS E8 VDD33 VDD33 VINL VINL VDD33 J7 SYNC E9 SHARE_CLK E6 VDD33 SYNC SHARE_CLK P3 B10 R20 A5 OPT 0805 E2 E1 F2 F1 COMP0a C C15 OPT C5 D5 C14 2200pF E8 R22 4.22K R23 OPT P4 E15 VOUT0_SNS P5 R25 VOSNS0+ D8 D10 E10 D9 R10 10K SW0 SNUB0 SYNC SHARE_CLK ISNS0aISNS0b- ALERT SCL ISNS0a+ ISNS0b+ TSNS0b TSNS0a U1 * SDA GPIO0 LTM4676EY / LTM4676AEY GPIO1 WP COMP0a RUN0 COMP0b RUN1 E7 SYNC H7 SHARE_CLK E5 ALERTB R11 10K R12 10K R13 10K R14 10K R15 10K R16 10K R18 10K E10 ALERTB SCL E11 SDA E12 SDA E6 SCL D6 SDA E4 GPIO0B F4 GPIO1B GPIO0B E13 GPIO0B GPIO1B C E14 GPIO1B K6 F5 RUN0 F6 RUN1 J6 VDD25 R24 10K RUN0 3 VDD25 ALERTB SCL VORB0+ VORB0- R19 10K VOSNS0+ 0 ON 2 JP1 1 OFF C16 OPT VOSNS0VOUT0 1.0V / 13A J7 E9 VOSNS0- ASEL G4 ASEL H4 FREQ_CFG + COUT5 330uF 6.3V 6TPF330M9L J8 COUT6 100uF 1210 COUT7 100uF 1210 COUT8 100uF 1210 GND R32 0 A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 FSWPHCFG VOUT0CFG G5 VOUT0_CFG H5 VTRIM0_CFG VTRIM0CFG VOUT1CFG VTRIM1CFG R26 (OPT) R27 (OPT) RUN0 VOUT0 G6 VOUT1_CFG H6 VTRIM1_CFG RUN1 R28 (OPT) 3 R29 (OPT) 2 JP2 1 OFF R30 R31 ON 6.34K 0 RUN1 DNC DNC DNC DNC VDD25 B C10 E11 H11 K10 G7 G8 F7 F8 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND A4 A6 A7 A8 A9 A10 B4 B5 B6 B7 B8 B9 C4 C6 C7 C8 C9 D4 D7 E3 F3 F10 G3 G10 G11 G12 H3 H10 J4 J10 K4 K7 K8 K9 L4 L5 L6 L7 L8 L9 M4 M6 M7 M8 M9 M10 GND0_SNS SGND SGND SGND SGND E16 E17 B R33 OPT NOTE: UNLESS OTHERWISE SPECIFIED * 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. U1 * WHEN VIN < 5.75V, SHORT INTVCC TO VIN WITH R8 = 0ohm. A - A LTM4676EY A - B LTM4676AEY 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 TECHNOLOGY HZ JIAN L. TITLE: SCHEMATIC SIZE DUAL STEP-DOWN uMODULE REGULATOR WITH POWER SYSTEM MANAGEMENT B 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. LTM4676EY + LTM4676AEY DEMO CIRCUIT 1811B-A/B Monday, December 01, 2014 SHEET 1 1 REV. 1 OF 3 5 4 3 2 1 ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN D D VOUT0 VOUT1 DYNAMIC LOAD CIRCUIT SGND E24 R51 2010 OPT VOUT0 J2 VOUT1 1 J3 1 VOUT0 C21 1uF 5 4 3 2 SGND R50 2010 OPT R48 2010 0.5W 0 C VOUT1 C22 1uF R49 2010 OPT 2 3 4 5 E23 C 2 4 BLEEDER LOADS OPTIONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION Q1 SUD50N03-09P E20 DO NOT EXCEED 5% DUTY CYCLE! OPT E22 RUN0 1 R53 0.01 2010 GND R41 OPT. COMP0a J4 R52 10K IOSTEP 2 3 4 5 R38 RUN1 3 GPIO1B C24 1uF 1 IOSTEP_CLK R35 OPT GPIO0B C23 1uF COMP1a B B 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. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 TECHNOLOGY HZ JIAN L. TITLE: SCHEMATIC A DUAL STEP-DOWN uMODULE REGULATOR WITH POWER SYSTEM MANAGEMENT SIZE IC NO. LTM4676EY / LTM4676AEY 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: DEMO CIRCUIT 1811B-A/B Monday, December 01, 2014 2 SHEET 2 1 REV. 1 OF 3 5 4 2 1 ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN D8 1 VDD33 3 2 R61 OPT GPIO1B J13 AUX3V4 SCL GND SDA D 4 AUX3V4 3 2 1 R62 OPT SYNC ALERTB SDA SCL SHARE_CLK D R63 0 GPIO0B TO DC2086A D2 OPT AUXP 3V3 AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA C 3 R72 4.99K 4 A1 WP A2 SCL VSS SDA R68 R67 OPT OPT RUN1 RUN1 FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V 100nF 2 R66 0 E30 U3 VCC RUN0 R83 OPT C26 A0 RUN0 3V3 1 2 3 4 5 6 7 8 9 10 11 12 TO DC1613A 1 E29 R65 0 E21 J1 D1 OPT R64 OPT R73 4.99K 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 J11 DEMO HEADER (F) 7 EEWP EESCL 5 EESDA VIN 24LC025-I/ST R74 OPT R75 OPT R70 10 R69 10 C C28 10nF C27 10nF J12 DEMO HEADER (M) R82 OPT 1206 8 AUXVCC 6 FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V R89 OPT R88 OPT B B PSM STACKING CONNECTORS: OPTIONAL CIRCUIT FOR PROGRAMMING WITHOUT VIN 3V3 Q19 VDD33 DMP3130L-7 3 HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416 J2, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC VDD33 1 VIN 2 J1, MALE, CONN R77 10K CUSTOMER NOTICE R78 15.8k 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. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 APPROVALS 4 3 TECHNOLOGY HZ JIAN L. TITLE: SCHEMATIC DUAL STEP-DOWN uMODULE REGULATOR WITH POWER SYSTEM MANAGEMENT SIZE 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. LTM4676EY / LTM4676AEY DEMO CIRCUIT 1811B-A/B Monday, December 01, 2014 SHEET 3 1 REV. 1 OF 3 A