DEMO MANUAL DC1780A-C LTM4620EV: High Efficiency, PolyPhase 100A Step-Down Power Module(R) Regulator DESCRIPTION Demonstration circuit 1780A-C features poly phase design using the LTM(R)4620EV, the high efficiency, high density, dual 13A, switch mode step-down power module regulator. The input voltage is from 4.5V to 16V. The output voltage is jumper selectable from 1.0V to 2.5V. DC1780A-C can deliver nominal 100A output current with 4x LTM4620s in parallel. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT, and thermal conditions. The LTM4620 on DC1780A-C always operates in continuous conduction mode. The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the TRACK_CONTROL pin. The output volt- age is tightly regulated between VOUT+ and VOUT- through remote output voltage sensing which improves output voltage regulation at heavy loads. These features and the availability of the LTM4620EV in a compact 15mm x 15mm x 4.41mm LGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4620 data sheet must be read in conjunction with this demo manual prior to working on or modifying the demo circuit DC1780A-C. Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, Linear Technology, the Linear logo, Module and PolyPhase are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO Figure 1. 100A PolyPhase LTM4620/DC1780A-C Demo Board dc1780acfa 1 DEMO MANUAL DC1780A-C PERFORMANCE SUMMARY PARAMETER Specifications are at TA = 25C CONDITIONS/NOTES VALUE Input Voltage Range 4.5V to 16V Output Voltage VOUT VIN = 4.5V to 16V, IOUT = 0A to 100A, JP4: 1.0V 1.0V 1.5% (0.985V to 1.015V) Maximum Continuous Output Current Derating is necessary for certain VIN, VOUT and thermal conditions, see data sheet for detail. 100A Default Operating Frequency 500kHz Resistor Programmable Frequency Range 400kHz to 780kHz External Clock Sync. Frequency Range 400kHz to 780kHz Efficiency VIN = 12V, VOUT = 1.0V, IOUT = 100A, fSW = 500kHz 80.5% See Figure 4 Load Transient VIN = 12V, VOUT = 1.0V, ISETP = 50A to 100A <156mV, See Figure 5 Output Voltage Ripple VIN = 12V, VOUT = 1.0V, IOUT = 100A, fSW = 500kHz <10mV, See Figure 6 QUICK START PROCEDURE Table 1. LTM4620 Demo Cards for up to 100A Point-of-Load Regulation MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGES NUMBER OF LTM4620 MODULE REGULATORS ON THE BOARD DEMO CARD NUMBER 13A, 13A 2 1 DC1498A 50A 1 2 DC1780A-A 75A 1 3 DC1780A-B 100A 1 4 DC1780A-C Demonstration circuit DC1780A-C is easy to set up to evaluate the performance of PolyPhase operation of the LTM4620EV. Due to the high input/output current, select a proper input supply/load/cable which can sustain the full load operation. Please refer to Figure 2 for proper measurement setup and follow the procedure below: 1. Place jumpers in the following positions for a typical 1.0VOUT application: JP1 JP2 JP4-JP8 CLK RUN VOUT SELECT INT_CLK OFF ON JP4/1.0V 2. With power off, connect the input power supply, load and meters as shown in Figure 2. Preset the load to 0A and VIN supply to 12V. 3. Turn on the power supply at the input. Place JP2 to ON position. The output voltage between VOUT+ and VOUT- should be 1.0V 1.5% (0.985V to 1.015V). 4. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, output voltage ripple, efficiency and other parameters. Output voltage ripple should be measured at J7 with BNC cables. 50 termination should be set on the oscilloscope or BNC cables. 5. (Optional) For optional load transient test, apply an adjustable pulse signal between IOSTEP CLK and GND test point. The pulse amplitude (3V to 3.5V) sets the load step current amplitude. The output transient current can be monitored at the BNC connector J8 (5mV/A). The pulse signal should be very small duty cycle (< 10%) to limit the thermal stress on the transient load circuit. dc1780acfa 2 DEMO MANUAL DC1780A-C QUICK START PROCEDURE 6. (Optional) LTM4620 can be synchronized to an external clock signal. Place the JP1 jumper on EXT_CLK and apply a clock signal (0V to 5V, square wave) on the EXT_CLK test point. 7. (Optional) The outputs of LTM4620 can track another supply. The output voltage tracks the voltage on TRACK_CONTROL when a valid signal is applied on the test point. 8. (Optional) DC1780A-C can be configured to a dual outputs configuration with VOUT at 87A load current and VOUT2 at 13A load current. Stuff 0 resistor on R61 and 0.1F on C14. Remove R22, R23, R24, R26, R27, R28, R32, R33, R35. Output voltage VOUT2 is set by R37 based on the equation VOUT2 = 0.6V (1 + 60.4k/ R37). * Figure 2. Test Setup of DC1780A-C * Note: The output current is measured with a mV-voltage meter across a 1% accurate shunt resistor. dc1780acfa 3 DEMO MANUAL DC1780A-C 100 100 90 90 80 VIN = 5V, VOUT = 2.5V VIN = 5V, VOUT = 1.8V VIN = 5V, VOUT = 1.5V VIN = 5V, VOUT = 1.2V VIN = 5V, VOUT = 1V 70 60 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (A) EFFICIENCY (%) EFFICIENCY (%) QUICK START PROCEDURE 80 VIN = 12V, VOUT = 2.5V VIN = 12V, VOUT = 1.8V VIN = 12V, VOUT = 1.5V VIN = 12V, VOUT = 1.2V VIN = 12V, VOUT = 1V 70 60 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (A) DC1780A-C F03 Figure 3. Measured Efficiency VIN = 5V, fSW = 500kHz DC1780A-C F04 Figure 4. Measured Efficiency VIN = 12V, fSW = 500kHz 1V OUTPUT (20MHz BW) 20mV/DIV 1V OUTPUT (20MHz BW) 100mV/DIV 50A TO 100A LOAD STEP DC1780A-C F05 Figure 5. Load Transient 50A to 100A (VIN = 12V, VOUTX = 1V) DC1780A-C F06 Figure 6. Measured Output Voltage Ripple at 12VIN, 1VOUT, 100A on J7 with Standard Demo Circuit Default Setup dc1780acfa 4 DEMO MANUAL DC1780A-C QUICK START PROCEDURE Figure 7. Thermal Capture at 12VIN, 1.0VOUT at 100A (Ambient Temperature = 23.3C, 200LFM Airflow and No Heat Sink) dc1780acfa 5 DEMO MANUAL DC1780A-C PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 16 CIN3, CIN4, CIN5, CIN6, CIN7, CIN8, CIN9, CIN10, CIN12, CIN13, CIN14, CIN15, CIN16, CIN17, CIN18, CIN19 Cap., X5R 22F 25V 10% 1210 Murata GRM32ER61226KE15 2 8 COUT1, COUT7, COUT11, COUT15, COUT20, COUT26, COUT30, COUT34 Cap., X5R 100F 10V 20% 1210 Taiyo Yuden LMK325BJ107MN-T 3 8 COUT4, COUT10, COUT12, COUT19, COUT23, Cap., POSCAP 470F 4V 20% 7343 COUT29, COUT31, COUT37 4 1 R14 Res., Chip 90.9k 0.06W 1% 0603 Vishay CRCW060390K9FKEA 5 4 R9, R31, R43, R51 Res., Chip 121k 0.06W 1% 0603 Vishay CRCW0603121KFKEA 6 2 R1, R3 Res., Chip 10 0.06W 5% 0603 Vishay CRCW060310R0JNEA 7 4 C4, C10, C18, C22 Cap., X5R 2.2F 10V 20% 0603 Taiyo Yuden LMK107BJ225MA 8 1 C7 Cap., X7R 0.1F 25V 10% 0603 AVX 06033C104KAT2A 9 4 U1, U2, U3, U4 I.C., Voltage Regulator LGA(144) 15mm x 15mm x 4.41mm (1873-REV0) Linear Technology Corp. LTM4620EV SANYO 4TPE470MCL Additional Demo Board Circuit Components 10 4 COUT5, COUT18, COUT24, COUT38 Cap., X5R 100F 10V 20% 1210 Taiyo Yuden LMK325BJ107MN-T 11 2 COUT6, COUT25, Cap., POSCAP 470F 4V 20% 7343 SANYO 4TPE470MCL 12 4 R2, R21, R39, R47 Res., Chip 121K 0.06W 1% 0603 Vishay CRCW0603121KFKEA 13 2 R25, R29 Res., Chip 10 0.06W 5% 0603 Vishay CRCW060310R0JNEA 14 1 C25 Cap., X7R 0.1F 25V 10% 0603 AVX 06033C104KAT2A 15 1 CIN1 Cap., Alum 150F 25V 25% SUNCON-8 SUNCON 25CE150AX 16 2 CIN2, CIN11 Cap., X5R 1F 25V 10% 1210 Taiyo Yuden TMK325BJ105KM 17 0 COUT2, COUT3, COUT8, COUT9, COUT13, COUT14, COUT16, COUT17, COUT21, COUT22, COUT27, COUT28, COUT32, COUT33, COUT35, COUT36 (OPT) Cap., 1210 18 0 C1, C2, C3, C5, C8, C9, C12, C13, C14, C15, C16, C17, C20, C21, C26, C29, C30 (OPT) Cap., 0603 19 6 C6, C11, C19, C23, C27, C28 Cap., X7R 1F 10V 10% 0603 20 1 C24 Cap., X7R 0.01F 100V 10% 0603 AVX 06031C103KAT2A 21 2 Q1, Q2 Mosfet N-channel, 30V DPAK (TO-252) Vishay Siliconix SUD50N03-09P 22 4 R4, R36, R41, R54 Res., Chip 10k 0.06W 5% 0603 Vishay CRCW060310K0JNEA 23 0 R5, R7, R8, R10, R13, R30, R37, R38, R42, R44, R48, R49, R50, R52, R53, R55, R61 (OPT) Res., 0603 24 14 R6, R19, R20, R27, R28, R32, R33, R34, R35, Res/Jumper, Chip 01/16W 1A 0603 R40, R45, R46, R62, R63 Vishay CRCW06030000Z0EA 25 1 R15 Res., Chip 60.4k 0.06W 1% 0603 Vishay CRCW060360K4FKEA 26 1 R16 Res., Chip 40.2k 0.06W 1% 0603 Vishay CRCW060340K2FKEA 27 1 R17 Res., Chip 30.1k 0.06W 1% 0603 Vishay CRCW060330K1FKEA 28 1 R18 Res., Chip 19.1k 0.06W 1% 0603 Vishay CRCW060319K1FKEA 29 4 R22, R23, R24, R26 Res., 0 2010 TEPRO(NAKOMA) RNH6083 30 2 R56, R57 Res., 0.010 2W 1% 2512 Vishay WSL-2512-R01000-F-EA 31 0 R58, R59 (OPT) Res., 2512 Taiyo Yuden LMK107BJ105KA dc1780acfa 6 DEMO MANUAL DC1780A-C PARTS LIST ITEM QTY 32 1 REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER R60 Res/Jumper, Chip 0 1/4W 1A 1206 Vishay CRCW12060000ZOEA Hardware for Demo Board Only 33 3 XJP1, XJP2, XJP4 Shunt, 2mm Ctrs. Samtec 2SN-BK-G 34 4 MH1-MH4 STAND-OFF, NYLON 0.5" Tall KEYSTONE, 8833 (SNAP ON) 35 11 E1, E2, E3, E4, E6, E7, E8, E9, E12, E13, E22 Turret, Testpoint Mill Max 2308-2-00-80-00-00-07-0 36 0 E5, E10, E11, E14, E15, E16, E17, E18 (OPT) Testpoint 37 2 E19, E20 Turret, Testpoint Mill Max 2501-2-00-80-00-00-07-0 38 2 JP1, JP2 Headers, 3 Pins 2mm Ctrs. Samtec TMM-103-02-L-S 39 5 JP4, JP5, JP6, JP7, JP8 Jumper, 2 Pins 2mm Ctrs. Samtec TMM-102-02-L-S 40 6 J1, J2, J3, J4, J5, J6 Stud, Test Pin PEM KFH-032-10 41 12 NUT, BRASS NUTS #10-32 ANY, #10-32 42 6 RING, LUG RING #10 KEYSTONE, 8205 43 6 WASHER, #10, Tin Plated Brass ANY, #10 EXT BZ TN 44 2 BNC Connector Connex 112404 J7, J8 dc1780acfa 7 A B C VIN- GND VIN 4.5V - 16V E4 J3 J1 E3 + CIN1 150uF 25V VIN 5 CIN4 22uF 25V 1210 C4 2.2uF 10V R13 (OPT) R10 (OPT) C6 1uF 10V E8 CIN6 22uF 25V 1210 121K 1% R9 EXTVCC CIN5 22uF 25V 1210 EXTVCC INTVCC_U1 CIN3 22uF 25V 1210 INTVCC_U1 CIN2 1uF 25V 1210 GND GND GND GND GND GND GND GND GND GND GND GND GND PHASMD FSET EXTVCC INTVCC VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN 3 2 1 LTM4620EV U1 121K 1% R2 JP1 CLK 4 1. ALL RESISTORS 0603. 2. ALL CAPACITORS 0603. NOTE: UNLESS OTHERWISE SPECIFIED. A6 A7 B6 B7 D1 D2 D3 D4 D9 D10 D11 D12 E1 G4 C6 J7 H8 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 INT_CLK EXT_CLK EXT_CLK E1 3 CLKOUT_U1 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 E2 E3 E4 E10 E11 E12 F1 F2 F3 F10 F11 F12 G1 G3 G10 G12 H1 H2 H3 H4 H5 H6 H7 H9 H10 H11 H12 J1 J5 J8 J12 K1 K5 K6 K7 K8 K12 L1 L12 M1 M12 VIN+ 4 K11 K10 K9 K4 K3 K2 J11 J10 J9 J4 J3 J2 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN J6 TEMP F4 MODE-PLLIN G5 CLKOUT A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 SGND SGND SGND SGND SGND SGND 8 3 C7 D6 F6 F7 G6 G7 D 5 SW1 VFB1 DIFFP DIFFN TRACK2 VOUT2S RUN2 COMP2 PGOOD2 SW2 VFB2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 DIFFOUT VOUT1S TRACK1 RUN1 COMP1 PGOOD1 E5 RUN SGND 0 Ohm 1206 R60 COUT7 100uF 10V 1210 C3 (OPT) CUSTOMER NOTICE VO- 470uF 4V 7343 + COUT4 RB JEFF Z. APP ENG. 2 SCALE = NONE C:\DOCUMENTS AND SETTINGS\JIAN_L\LOCAL SETTINGS\TEMP\WZ10E0\1780A-C_00_REV2.DSN THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. VIN C5 (OPT) (OPT) R7 3 2 1 DATE: N/A SIZE 1 R14 R63 COMP VOUT SELECT VFB 1 Wednesday, March 28, 2012 LTM4620EV SHEET DEMO CIRCUIT 1780A-C 1 OF 4 2 REV. LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY HIGH EFFICIENCY, POLYPHASE, STEP-DOWN POWER MODULE REGULATOR IC NO. 02/06/12 TRACK_CONTROL TRACK RUN VFB DATE 09/02/10 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 JP8 JP7 2.5V JP5 1.5V JP4 1.2V 30.1K 1% R18 19.1K 1% PGOOD VO- GND VOUT 0.6 - 2.5V 100A VO+ PGOOD 1.0V E9 JP6 1.8V 0 Ohm E7 E6 J4 J2 E2 40.2K 1% R17 60.4K 1% R16 90.9K 1% R15 OFF ON TECHNOLOGY C7 0.1uF R62 0 Ohm JP2 RUN R4 10K R3 10 R1 10 VO- 470uF 4V 7343 + COUT6 INTVCC_U1 COUT5 100uF 10V 1210 VOUT VO+ JEFF Z. JEFF Z. 1ST PROTOTYPE PRODUCTION APPROVED DESCRIPTION REVISION HISTORY TITLE: SCHEMATIC 470uF 4V + COUT10 APPROVALS COUT9 (OPT) 1210 VOUT R8 (OPT) (OPT) C2 (OPT) VO+ 1 2 - C1 REV ECO PCB DES. COUT8 (OPT) 1210 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. DIFFP DIFFN E22 TRACK D8 E8 E9 VO+ COMP C8 PGOOD SW2-1 F9 E10 (OPT) G8 VFB R6 0 Ohm E7 G11 D7 A8 A9 A10 A11 A12 B8 B9 B10 B11 B12 C9 C10 C11 C12 F8 VOUT TRACK C5 RUN E5 R5 F5 PGOOD COUT3 (OPT) 1210 COMP SW1-1 VFB COUT2 (OPT) 1210 E6 G9 G2 D5 COUT1 100uF 10V 1210 2 A B C D DEMO MANUAL DC1780A-C SCHEMATIC DIAGRAM dc1780acfa A B C R34 0 Ohm R30 (OPT) INTVCC_U2 CIN7 22uF 25V 1210 VIN C10 2.2uF 10V 5 CIN9 22uF 25V 1210 C11 1uF 10V INTVCC_U2 CIN8 22uF 25V 1210 121K 1% R31 EXTVCC CIN10 22uF 25V 1210 A6 A7 B6 B7 D1 D2 D3 D4 D9 D10 D11 D12 E1 G4 C6 J7 H8 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 GND GND GND GND GND GND GND GND GND GND GND GND GND PHASMD FSET EXTVCC INTVCC VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN R21 R19 0 Ohm R20 0 Ohm LTM4620EV U2 121K 1% 4 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 4 E2 E3 E4 E10 E11 E12 F1 F2 F3 F10 F11 F12 G1 G3 G10 G12 H1 H2 H3 H4 H5 H6 H7 H9 H10 H11 H12 J1 J5 J8 J12 K1 K5 K6 K7 K8 K12 L1 L12 M1 M12 D K11 K10 K9 K4 K3 K2 J11 J10 J9 J4 J3 J2 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN J6 TEMP F4 MODE-PLLIN G5 CLKOUT DIFFP DIFFN TRACK2 VOUT2S RUN2 COMP2 PGOOD2 SW2 VFB2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 DIFFOUT VOUT1S TRACK1 RUN1 COMP1 PGOOD1 SW1 VFB1 RUN TRACK F5 E5 E8 E9 D8 C15 (OPT) 3 VOUT2_U2 VO2- R29 10 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. 2 J5 VO2- GND JEFF Z. APP ENG. SCALE = NONE RB PCB DES. APPROVALS E13 VO2+ VOUT/ VOUT2_U2 E12 COUT25 + 470uF 4V J6 7343 R25 10 VO2+ COUT38 100uF 10V 1210 2 CUSTOMER NOTICE (OPT) R61 VO2- R37 (OPT) DIFFOUT_U2 C13 (OPT) C12 (OPT) VO2+ COUT18 + COUT19 470uF 100uF 10V 4V 1210 7343 VOUT2_U2 R38 INTVCC_U2 COUT17 (OPT) 1210 (OPT) 10K R36 COUT16 (OPT) 1210 C14 (OPT) SW2-2 E14 COUT15 100uF 10V 1210 C9 (OPT) C8 (OPT) COUT14 (OPT) 1210 VO2+ RUN_U2 F9 E11 SW1-2 COUT13 (OPT) 1210 VOUT TRACK_U2 COMP_U2 C8 PGOOD_U2 G8 VFB_U2 E7 G11 D7 A8 A9 A10 A11 A12 B8 B9 B10 B11 B12 C9 C10 C11 C12 F8 COUT12 4V 7343 + 470uF DIFFOUT_U2 COMP C5 PGOOD VFB COUT11 100uF 10V 1210 E6 3 G9 G2 D5 CLKOUT_U2 CLKOUT_U1 A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 SGND SGND SGND SGND SGND SGND C7 D6 F6 F7 G6 G7 5 DATE: N/A SIZE IC NO. R27 0 Ohm 0 Ohm R35 0 Ohm R33 0 Ohm R32 0 Ohm R28 R22 0 Ohm 2010 R26 0 Ohm 2010 R24 0 Ohm 2010 R23 0 Ohm 2010 TECHNOLOGY TRACK RUN COMP PGOOD VFB LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 VOUT2_U2 1 Monday, February 06, 2012 SHEET LTM4620EV DEMO CIRCUIT 1780A-C 2 OF 4 2 REV. HIGH EFFICIENCY, POLYPHASE, STEP-DOWN POWER MODULE REGULATOR TITLE: SCHEMATIC TRACK_U2 RUN_U2 COMP_U2 PGOOD_U2 VFB_U2 VOUT DO NOT STUFF 0 OHM JUMPERS FOR SEPARATE VOUT2_U2. 1 A B C D DEMO MANUAL DC1780A-C SCHEMATIC DIAGRAM dc1780acfa 9 A B C 5 CIN12 22uF 25V 1210 R44 (OPT) R42 (OPT) INTVCC_U3 CIN11 1uF 25V 1210 CIN14 22uF 25V 1210 C18 2.2uF 10V C19 1uF 10V 121K 1% R43 CIN15 22uF 25V 1210 EXTVCC INTVCC_U3 CIN13 22uF 25V 1210 A6 A7 B6 B7 D1 D2 D3 D4 D9 D10 D11 D12 E1 G4 C6 J7 H8 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 GND GND GND GND GND GND GND GND GND GND GND GND GND PHASMD FSET EXTVCC INTVCC VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN R40 0 Ohm U3 LTM4620EV 121K 1% R39 CLKOUT_U3 CLKOUT_U2 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 4 E2 E3 E4 E10 E11 E12 F1 F2 F3 F10 F11 F12 G1 G3 G10 G12 H1 H2 H3 H4 H5 H6 H7 H9 H10 H11 H12 J1 J5 J8 J12 K1 K5 K6 K7 K8 K12 L1 L12 M1 M12 VIN 4 K11 K10 K9 K4 K3 K2 J11 J10 J9 J4 J3 J2 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN J6 TEMP F4 MODE-PLLIN G5 CLKOUT CLKOUT_U3 CLKOUT_U2 3 A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 SGND SGND SGND SGND SGND SGND 10 3 C7 D6 F6 F7 G6 G7 D 5 DIFFP DIFFN TRACK2 VOUT2S RUN2 COMP2 PGOOD2 SW2 VFB2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 DIFFOUT VOUT1S TRACK1 RUN1 COMP1 PGOOD1 SW1 VFB1 E15 E8 E9 D8 COUT26 100uF 10V 1210 COUT27 (OPT) 1210 CUSTOMER NOTICE TRACK C17 (OPT) COUT24 100uF 10V 1210 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. INTVCC_U3 COMP RUN E7 C8 PGOOD G8 F9 G11 D7 A8 A9 A10 A11 A12 B8 B9 B10 B11 B12 C9 C10 C11 C12 F8 COUT22 + COUT23 470uF (OPT) 4V 1210 7343 PGOOD VFB COUT21 (OPT) 1210 SW2-3 E16 E5 VFB RUN TRACK F5 C5 COMP SW1-3 E6 G9 G2 D5 COUT20 100uF 10V 1210 VOUT 2 VOUT JEFF Z. APP ENG. SCALE = NONE RB PCB DES. APPROVALS COUT28 COUT29 + 470uF (OPT) 4V 1210 7343 C16 (OPT) DATE: N/A SIZE IC NO. LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 RUN VFB TRACK COMP PGOOD 1 Monday, February 06, 2012 SHEET LTM4620EV DEMO CIRCUIT 1780A-C 3 OF 4 2 REV. HIGH EFFICIENCY, POLYPHASE, STEP-DOWN POWER MODULE REGULATOR TITLE: SCHEMATIC TECHNOLOGY R41 10K INTVCC_U3 1 A B C D DEMO MANUAL DC1780A-C SCHEMATIC DIAGRAM dc1780acfa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C R52 (OPT) R50 (OPT) INTVCC_U4 CIN16 22uF 25V 1210 VIN C22 2.2uF 10V 5 CIN18 22uF 25V 1210 C23 1uF 10V INTVCC_U4 CIN17 22uF 25V 1210 121K 1% R51 EXTVCC CIN19 22uF 25V 1210 A6 A7 B6 B7 D1 D2 D3 D4 D9 D10 D11 D12 E1 G4 C6 J7 H8 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 GND GND GND GND GND GND GND GND GND GND GND GND GND PHASMD FSET EXTVCC INTVCC VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN R45 0 Ohm R46 0 Ohm LTM4620EV U4 121K 1% R47 4 CLKOUT_U4 CLKOUT_U3 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 4 E2 E3 E4 E10 E11 E12 F1 F2 F3 F10 F11 F12 G1 G3 G10 G12 H1 H2 H3 H4 H5 H6 H7 H9 H10 H11 H12 J1 J5 J8 J12 K1 K5 K6 K7 K8 K12 L1 L12 M1 M12 D K11 K10 K9 K4 K3 K2 J11 J10 J9 J4 J3 J2 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN J6 TEMP F4 MODE-PLLIN G5 CLKOUT DIFFP DIFFN TRACK2 VOUT2S RUN2 COMP2 PGOOD2 SW2 VFB2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 DIFFOUT VOUT1S TRACK1 RUN1 COMP1 PGOOD1 SW1 VFB1 TRACK E5 3 RUN F9 E8 E9 D8 (OPT) C30 (OPT) R55 TRACK COMP C8 PGOOD E7 VFB G8 G11 D7 A8 A9 A10 A11 A12 B8 B9 B10 B11 B12 C9 C10 C11 C12 F8 R49 (OPT) RUN F5 C5 COMP E6 VFB COUT30 100uF 10V 1210 PGOOD 3 G9 G2 D5 CLKOUT_U4 CLKOUT_U3 A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 SGND SGND SGND SGND SGND SGND C7 D6 F6 F7 G6 G7 5 R48 VO- SW2-4 E18 COUT34 100uF 10V 1210 (OPT) R53 (OPT) (OPT) C29 J8 J7 C24 0.01uF C25 0.1uF 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C27 1uF 10V JEFF Z. APP ENG. SCALE = NONE RB PCB DES. APPROVALS C26 (OPT) C28 1uF 10V R57 0.010 1% 2W 2512 DATE: N/A SIZE R58 (OPT) 2512 1 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 GND E20 IOSTEP CLK E19 IC NO. 1 Monday, February 06, 2012 SHEET LTM4620EV DEMO CIRCUIT 1780A-C 4 OF 4 2 REV. HIGH EFFICIENCY, POLYPHASE, STEP-DOWN POWER MODULE REGULATOR LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY R59 (OPT) 2512 R54 10K Q2 SUD50N03-09P VOUT TECHNOLOGY TITLE: SCHEMATIC R56 0.010 1% 2W 2512 PGOOD TRACK RUN COMP VFB Q1 SUD50N03-09P LOAD TRANSIENT CIRCUIT CUSTOMER NOTICE IOSTEP VOUT COUT36 + COUT37 470uF (OPT) 4V 1210 7343 VOUT 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. VO+ COUT35 (OPT) 1210 C21 (OPT) SW1-4 COUT33 (OPT) 1210 C20 (OPT) COUT32 (OPT) 1210 E17 COUT31 4V 7343 + 470uF VOUT 2 A B C D DEMO MANUAL DC1780A-C SCHEMATIC DIAGRAM dc1780acfa 11 DEMO MANUAL DC1780A-C DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright (c) 2004, Linear Technology Corporation dc1780acfa 12 Linear Technology Corporation LT 0712 REV A * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2012