5 4 3 2 1 REVISION HISTORY ECO REV > DESCRIPTION A DATE PROTOTYPE APPROVED 08/24/05 L1 4.7uH CDRH4D22/HP-4R7 D D VOUT1 TP1 D1 [1] R1 52.3K D2 NSR0230M2T5G CFF1 OPT C1 22uF 10V C2 0.1uF R2 TP9 10K VOUT1 5V @ 1.6A GND R3 100K C3 OPT U1 VIN 6.8V to 25V VIN TP4 CIN1 4.7uF X7R 25V C6 0.1uF C7 OPT D4 DFLS230L GND C9 0.1uF 1 BOOST1 FB1 16 2 SW1 Vc1 15 3 VIN1 PG1 14 PG1A 4 VIN1 Run/SS1 13 RUN/SS1A 5 VIN2 Run/SS2 12 RUN/SS2A 6 VIN2 PG2 11 PG2A Vc2 10 FB2 9 7 SW2 8 BOOST2 D5 [1] TP8 GND C C5 0.1uF C4 220pF C8 220pF R5 28K C12 OPT R8 31.6K B D7 [1] C TP3 TP5 TP6 TP7 VOUT1 D6 R4 39K C10 C11 0.1uF 0.1uF NSR0230M2T5G CFF2 OPT R6 100K TP2 C13 22uF 10V 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 PG2 3 GND VOUT2 TP10 CUSTOMER NOTICE [1] DO NOT STUFF. Run/SS2 B L2 3.5uH CDRH4D22/HP-3R5 NOTES: UNLESS OTHERWISE SPECIFIED, Run/SS1 R7 10K VOUT2 A PG1 17 D3 DFLS230L LT3506AEDHD 3.3V @ 1.6A C14 0.1uF CONTRACT NO. APPROVALS DATE DRAWN AntoninaKarpova 4/26/06 CHECKED TECHNOLOGY TITLE A LT3506AEDHD 1.1MHz DUAL MONOLITHIC 1.6A STEP- DOWN REGULATOR APPROVED ENGINEER Walker Bai 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 4/26/06 DESIGNER Monday, August 07, 2006 SIZE CAGE CODE SCALE: 2 FILENAME: DWG NO REV DC958A DC958A.DSN A SHEET 1 1 OF 2 5 4 3 2 1 L3 4.7uH D53LC, type A VOUT3 TP11 D R9 12.4K D8 NSR0230M2T5G C15 22uF 6.3V CFF3 OPT D9 [1] R10 10K C17 OPT R11 100K C21 OPT D11 DFLS230L C23 0.1uF D12 [1] GND BOOST1 FB1 16 2 SW1 Vc1 15 3 VIN1 PG1 14 PG1 RUN/SS1 4 VIN1 Run/SS1 13 5 VIN2 Run/SS2 12 6 VIN2 PG2 7 SW2 8 BOOST2 GND CIN2 4.7uF X7R 25V C20 0.1uF 1 C18 470pF TP15 11 PG2 TP16 Vc2 10 FB2 9 C24 0.1uF TP19 D13 C22 330pF TP17 C25 0.1uF R13 24.3K [1] CFF4 OPT VOUT4 TP20 L4 3.3uH D53LC, type A C27 47uF 6.3V CUSTOMER NOTICE 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 PG2 R15 10K VOUT4 4 C Run/SS2 TP18 R14 100K B A PG1 Run/SS1 GND C26 OPT R16 4.99K D14 NSR0230M2T5G TP13 RUN/SS2 VOUT3 5 GND R12 20K 17 VIN1 TP14 TP12 LT3506EDHD C19 0.1uF VIN 3.6V to 21V C D C16 0.1uF U2 D10 DFLS230L VOUT3 1.8V @ 1.6A C28 0.1uF CONTRACT NO. APPROVALS DATE DRAWN AntoninaKarpova 4/26/06 CHECKED TECHNOLOGY TITLE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A LT3506EDHD 575KHz DUAL MONOLITHIC 1.6A STEP- DOWN REGULATOR APPROVED ENGINEER Walker Bai B 1.2V @ 1.6A 4/26/06 DESIGNER Monday, August 07, 2006 SIZE CAGE CODE SCALE: 2 FILENAME: DWG NO REV DC958A DC958A.DSN A SHEET 1 2 OF 2