A B C D E REVISION HISTORY ECO REV DESCRIPTION 2 VCC 1 DATE ADDED STAND OFFS 3 Fab note change, Format change APPROVED 10/17/09 M.LEE 09/18/09 M.LEE R9B OPT E1 4 4 LATCH E2 I- VCC E3 I+ VCC R12C RS2 200m E4 OPT E5 R12B INPUT OUTPUT 1% J1 RS1 200m 10 OUTPUT 3A 4V - 75V J2 1% 1 INPUT RJ-2 E6 RS3 200m V+ 0 2 D2 R9A 22K 1% E7 V- SMAT70A VCC C2 R12A VCC OPT R1C 7 8 LATCH 9 V- 10 11 1 CCLM2700 I- VCC D1 GND I+ E9 3 12 C1 100nF 100V GND R2B 10nF 50V OPT 2 3 6V - 75V J3 V+ E8 R2A 102K 1% OPT R1A 25.5K 1% U1 GND GND IMON PMON CMP+ CMPOUT R1B 0 13 E10 J4 RJ-5 OPT RJ-4 0 6 5 4 3 1 GND 1 1 LED2 GRN UNDER 2 POWER LIMIT LED1 RED OVER PAD CMPOUT 2 2 LT2940CDD E11 CMPOUT E12 2 CMPOUT 2 C3 R3 R4B R5B OPT OPT 0 0 E15 GND E13 PMON 10W / V C4 OPT R4A 15K 1% E14 IMON 1A / V R5A 15K 1% C5 E16 GND OPT INPUT MEASUREMENT RANGE VOLTAGE 8V - 40V CURRENT 0 - 3A CUSTOMER NOTICE FULL SCALE OUTPUT 1 PMON IMON 30W 3A 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. CONTRACT NO. APPROVALS ENG. M.LEE B C TITLE: SCHEMATIC SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. A TECHNOLOGY PCB DES.M.ITURRALDE DATE: D IC NO. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only POWER MONITOR LT2940CDD DEMO CIRCUIT 1495A Tuesday, January 26, 2010 SHEET E REV 3 1 OF 1 1