DEMO MANUAL DC1892A LTM4630EV High Efficiency, Dual 18A Step-Down Power Module(R) Regulator DESCRIPTION Demonstration circuit 1892A features the LTM(R)4630EV, the high efficiency, high density, dual 18A, switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC1892A can deliver up to 18A maximum in each channel. As explained in the LTM4630 data sheet, output current derating is necessary for certain VIN, VOUT and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise-sensitive applications or Burst Mode(R) operation in less noise-sensitive applications. Two outputs can be connected in parallel for a single 36A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. The output can be set up to either coincidentally or ratiometrically track with another supply's output. Remote output voltage sensing is available for improved output voltage regulation at the load point. These features and the availability of the LTM4630EV in a compact 16mm x 16mm x 4.41mm LGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4630 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC1892A. Design files for this circuit board are available at http://www.linear.com/demo/DC1892A L, LT, LTC, LTM, Linear Technology, Linear logo, Module and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO Figure 1. DC1892A dc1892afb 1 DEMO MANUAL DC1892A PERFORMANCE SUMMARY PARAMETER Specifications are at TA = 25C CONDITIONS/NOTES VALUE Input Voltage Range 4.5V ~ 15V Output Voltage VOUT1 VIN = 4.5 ~ 15V, IOUT1 = 0A ~ 18A, JP1: CCM 1.5V 1.5% (1.4775V ~ 1.5225V) Output Voltage VOUT2 VIN = 4.5 ~ 15V, IOUT2 = 0A ~ 18A, JP1: CCM 1V 1.5% (0.985V ~ 1.015V) Per Channel Maximum Continuous Output Current Derating Is Necessary for Certain VIN, VOUT and Thermal Conditions. See the LTM4630 Data Sheet for Details 18A Default Operating Frequency 500kHz Resistor Programmable Frequency Range 250kHz to 780kHz External Clock Sync. Frequency Range 400kHz to 780kHz Efficiency of Channel 1 VIN = 5V, VOUT1 = 1.5V, IOUT1 = 18A, fSW = 500kHz 89.7%, See Figure 3 Efficiency of Channel 2 VIN = 5V, VOUT2 = 1V, IOUT2 = 18A, fSW = 500kHz 84.8%, See Figure 4 Load Transient of Channel 1 VIN = 12V, VOUT1 = 1.5V, ISETP = 9 ~ 18A See Figure 5 Load Transient of Channel 2 VIN = 12V, VOUT2 = 1V, ISETP = 9 ~ 18A See Figure 6 QUICK START PROCEDURE Demonstration circuit DC1892A is easy to set up to evaluate the performance of the LTM4630EV. Please refer to Figure 2 for proper measurement setup and follow the procedure below: 1.Place jumpers in the following positions for a typical application: JP1 JP2 JP3 JP4 JP5 JP6 MODE RUN1 RUN2 TRACK1 SEL. TRACK2 SEL. CLKOUT PHASE CCM ON ON SOFTSTART SOFTSTART 90 2.With power off, connect the input power supply, load and meters, as shown in Figure 1. Preset the load to 0A and the VIN supply to 12V. 3.Turn on the power supply at the input. The output voltage in channel 1 should be 1.5V 1.5% (1.4775V ~ 1.5225V) and the output voltage in channel 2 should be 1V 1.5% (0.985V ~ 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 ripple should be measured at J1 and J2 with BNC cables. 50 termination should be set on the oscilloscope or BNC cables. 2 5.(Optional) For optional load transient test, apply an adjustable pulse signal between the IOSTEP CLK and GND test points. Pulse amplitude (3V ~ 3.5V) sets the load step current amplitude. The output transient current can be monitored at the BNC connector J3 (15mV/A). The pulse signal should have very small duty cycle (< 10%) to limit the thermal stress on the transient load circuit. Switch the jumper resistors R34 or R35 (on the backside of boards) to apply load transient on channel 1 or channel 2, correspondingly. 6.(Optional) LTM4630 can be synchronized to an external clock signal. Place the JP1 jumper on EXT_CLK and apply a clock signal (0 ~ 5V, square wave) on the CLKIN test point. 7.(Optional) The outputs of LTM4630 can track another supply. The jumpers JP4 and JP5 allow choosing softstart or output tracking. If tracking external voltage is selected, the corresponding test points, TRACK1 and TRACK2, need to be connected to a valid voltage signal. 8.(Optional) LTM4630 can be configured for a 2-phase single output at up to 36A on DC1892A. Install 0 resistors on R14, R17, R28, R39 and remove R7, R19. Output voltage is set by R25 based on the equation: 60.4k VOUT = 0.6V * 1+ R25 dc1892afb DEMO MANUAL DC1892A QUICK START PROCEDURE - A + + LOAD (0A TO 18A) A - LOAD (0A TO 18A) - VOUT1 VOUT1 + + - - A + VIN 4.5V TO 15V + - + - Figure 2. Test Setup of the DC1892A dc1892afb 3 DEMO MANUAL DC1892A QUICK START PROCEDURE 95 VIN = 5V EFFICIENCY (%) 90 85 VIN = 12V 80 75 70 65 0 2 4 6 10 12 8 LOAD CURRENT (A) 14 16 18 dc1892a F03 Figure 3. Measured Efficiency on Channel 1. VOUT1 = 1.5V, fSW = 500kHz, Channel 2 Disabled, CCM, 0A to 18A 95 VIN = 5V EFFICIENCY (%) 90 85 VIN = 12V 80 75 70 65 0 2 4 6 10 12 8 LOAD CURRENT (A) 14 16 18 dc1892a F04 Figure 4. Measured Efficiency on Channel 2. VOUT2 = 1V, fSW = 500kHz, Channel 1 Disabled, CCM, 0A to 18A 4 dc1892afb DEMO MANUAL DC1892A QUICK START PROCEDURE 9A to 18A LOAD STEP 1.5V OUTPUT (20MHz BW) [50mV/DIV] Figure 5. Measured Channel 1, 9A to 18A Load Transient (VIN = 12V, VOUT1 = 1.5V) 9A to 18A LOAD STEP 1V OUTPUT (20MHz BW) [50mV/DIV] Figure 6. Measured Channel 2, 9A to 18A Load Transient (VIN = 12V, VOUT2 = 1V) dc1892afb 5 DEMO MANUAL DC1892A QUICK START PROCEDURE Figure 7. Thermal Capture at 12VIN, 1.5VOUT1 at 18A and 1VOUT2 at 18A (TA = 25C, 200 LFM Airflow and No Heat Sink) 6 dc1892afb DEMO MANUAL DC1892A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 4 CIN2, CIN3, CIN4, CIN5 CAP., X5R, 22F, 25V, 10%,1210 MURATA, GRM32ER61E226KE15 2 2 COUT1, COUT7, COUT9, COUT10 CAP., 470F, 4V, POSCAP, F8 SANYO, 4TPE470MCL 3 2 COUT4, COUT5 CAP., X5R, 100F, 6.3V, 20%, 1210 AVX, 12106D107MAT2A 4 2 R22, R26 RES., CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA 5 1 R19 RES., CHIP, 90.9k, 1%, 0603 VISHAY, CRCW060390K0FKEA 6 1 R25 RES., CHIP, 40.2k, 1%, 0603 VISHAY,CRCW060340K2FKEA 7 1 R5, R30 RES., CHIP, 121k, 1%, 0603 VISHAY,CRCW0603121KFKEA 8 1 U1 LTM4630EV, 16x16x4.41-LGA LINEAR TECHNOLOGY, LTM4630EV CIN1 CAP., 150F, 25V, ALUMINUM ELECTR., SUN ELECT., 25CE150AX Additional Demo Board Circuit Components 9 1 10 0 COUT2, COUT3, COUT6, COUT8 OPT, 1210 11 1 C1 CAP., X5R, 4.7F, 25V,10%, 0805 AVX, 08053D475KAT2A 12 1 C2 CAP., X7R, 1F, 25V,10%, 0805 AVX, 08053C105KAT2A 13 2 C5, C7 CAP., X5R, 0.1F, 25V, 10%, 0603 AVX, 06033D104KAT 14 0 C3, C4, C6, C8-C12 OPT, 0603 15 2 C13, C14 CAP., X7R, 0.01F, 50V, 10%, 0603 AVX, 06035C103KAT2A 16 2 C15, C16 CAP., X7R, 1F, 10V, 10%, 0603 AVX, 0603ZC105KAT2A 17 1 Q1 N-CHANNEL 30V MOSFET VISHAY, SUD50N03-09P 18 2 R1, R3, RES., CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA 19 0 R2, R4, R6, R8, R11, R14, R16, R17, R20, OPT, 0603 R23, R28, R31, R33, R39, R40 20 4 R24, R27, R36 RES., CHIP, 10k, 1%, 0603 VISHAY, CRCW060310K0FKED 21 4 R7, R21, R29, R32 RES., CHIP, 0, 1%, 0603 VISHAY, CRCW06030000Z0ED 22 5 R9, R12, R15, R18 RES., CHIP, 60.4k, 1%, 0603 VISHAY, CRCW060360K4FKED 23 2 R10, R13 RES., CHIP, 6.04k, 1%, 0603 VISHAY, CRCW06036K04FKED 24 1 R34 RES., CHIP, 0, 0.5W, 2010 VISHAY, CRCW20100000Z0EF 25 0 R35 OPT, 2010 26 1 R37 RES., CHIP, 0.015, 2W, 2512 27 0 R38 OPT, 2512 VISHAY, WSL2512R0150FEA Hardware: For Demo Board Only 28 16 E1, E3-E10, E12-E16 TESTPOINT, TURRET, 0.094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0 29 3 J1, J2, J3 CONN, BNC, 5 PINS CONNEX 112404 30 6 J4-J9 JACK BANANA KEYSTONE, 575-4 31 1 JP1 HEADER, 4-PIN, 0.079", DOUBLE ROW SAMTEC, TMM104-02-L-D 32 1 JP6 HEADER, 4-PIN, 0.079", SINGLE ROW SAMTEC, TMM104-02-L-S 33 3 JP2, JP3, JP4 HEADER, 3-PIN, 0.079", SINGLE ROW SAMTEC, TMM103-02-L-S 34 1 JP5 HEADER, 3-PIN, 0.079", DOUBLE ROW SAMTEC, TMM-103-02-L-D 35 6 XJP1-XJP6 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G 36 4 (STAND-OFF) STAND-OFF, NYLON, 0.50" KEYSTONE, 8833 (SNAP-ON) dc1892afb 7 A B C D VIN E3 TP1 E7 J7 J6 E6 E1 E5 J5 J4 150uF 25V R26 10 R2 OPT 3 VOUT1 VO1- 2 COUT8 + COUT7 OPT 470uF 1210 4V VOUT1 C5 0.1uF 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE 0603. 5 R6 OPT INTVCC 10K R27 4 0 R32 DIFFP VO1+ E6 G9 G2 D5 R29 DIFFN VO1- C12 OPT COMP1 C11 OPT A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 F8 R21 0 C5 E5 F5 L10 L11 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 BM CCM 7 5 EXT_CLK 1 PS 3 E16 CLKIN INTVCC TEMP E15 121K R5 TEMP VIN CIN5 22uF 25V 1210 DIFFOUT R20 OPT RUN1 CIN4 22uF 25V 1210 470uF VFB1 4V R25 40.2K C9 OPT VOUT1S TRACK1 CIN3 22uF 25V 1210 + COUT9 SOFT-START JP4 2 C3 OPT CIN2 22uF 25V 1210 TRACK TRACK1 SEL. JP2 OFF ON RUN1 COUT5 100uF COUT6 6.3V OPT 1210 1210 R22 10 VO1+ R12 60.4K R9 60.4K + CIN1 NOTE: UNLESS OTHERWISE SPECIFIED PGOOD1 SW1 VO1- GND 1.5V / 18A VOUT1 VO1+ TRACK1 VIN- GND 4.5V - 15V E4 3 1 VIN+ COMP1 PGOOD1 SW1 VFB1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 DIFFOUT VOUTS1 TRACK1 RUN1 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN DIFFN E9 DIFFP E8 FSET o o 60 90 120 o R30 121K CLKOUT PHASE C6 INTVCC JP6 3 2 1 JP1 MODE J6 4 4 1 L9 L8 L7 L6 L5 L4 L3 L2 K11 K10 K9 K4 K3 K2 J11 J10 J9 J4 J3 J2 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN PHASMD G4 8 6 4 2 E14 CLKOUT 3 U1 0805 C1 4.7uF INTVCC LTM4630EV TEMP F4 MODE-PLLIN G5 CLKOUT H8 INTVCC J7 EXTVCC INTVCC C2 1uF 0805 E13 EXTVCC A8 A9 A10 A11 A12 B8 B9 B10 B11 B12 C9 C10 C11 C12 3 RUN2 90.9K R19 C8 OPT APPROVALS C10 OPT COMP2 VFB2 C6 OPT 2 SCALE = NONE 1 R24 10K 4 EXT. 3 SOFT-START 5 R13 R15 E9 J9 J8 E8 E12 TP2 VOUT2 VO2+ PGOOD2 SW2 TRACK2 VO2- GND 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only R18 60.4K DATE 01-21-15 1.0V / 18A 60.4K E10 6.04K APPROVED HAORAN W. DATE: N/A SIZE LTM4630EV 1 DEMO CIRCUIT 1892A Wednesday, January 21, 2015 IC NO. SHEET 1 1 OF 2 REV. HIGH EFFICIENCY, DUAL 18A STEP-DOWN m MODULE REGULATOR TECHNOLOGY INTVCC C7 0.1uF 6 2 TRACK2 SEL. R3 10 R1 10 R10 6.04K VOUT1 VO2- COUT4 100uF 6.3V 1210 VO2+ VO2+ PRODUCTION VOUT1 1 JP5 1 DESCRIPTION REVISION HISTORY VO2- COUT3 OPT 1210 REV COUT2 OPT 1210 __ ECO TITLE: SCHEMATIC TRACK2 RUN2 OPT R8 C4 OPT 1 470uF 4V + COUT1 ON OFF JP3 3 VOUT2S R7 0 OPT R4 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE M12 M1 L12 L1 K12 K8 K7 K6 K5 K1 J12 J8 J5 J1 H12 H11 H10 H9 H7 H6 H5 H4 H3 G7 G6 F7 F6 D6 C7 E7 G8 G11 D7 R16 OPT D8 F9 C8 VIN 470uF 4V + COUT10 VOUT2 2 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. LT VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. HAORAN W. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND SGND SGND SGND SGND SGND SGND COMP2 PGOOD2 SW2 VFB2 TRACK2 RUN2 VOUTS2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 VOUT2 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 A6 A7 B6 B7 D1 D2 D3 D4 D9 D10 D11 D12 E1 E2 E3 E4 E10 E11 E12 F1 F2 F3 F10 F11 F12 G1 G3 G10 G12 H1 H2 2 8 0 5 A B C D DEMO MANUAL DC1892A SCHEMATIC DIAGRAM dc1892afb 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 D R40 OPT 5 COMP1 VFB1 TRACK1 RUN1 OPT R28 OPT R17 OPT R14 OPT R39 COMP2 VFB2 TRACK2 RUN2 4 INTVCC OPTIONAL JUMPER FOR 1 OUTPUT CONFIGURATION TEMP 4 VOUT1 J1 C13 0.01uF VOUT1 R31 OPT R11 OPT R23 OPT R33 OPT C15 1uF IOSTEP C16 1uF J3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C14 0.01uF SCALE = NONE 2 HAORAN W. LT APPROVALS R37 0.015 1W 2512 1 E18 E17 VOUT2 DATE: N/A SIZE LTM4630EV 1 DEMO CIRCUIT 1892A Wednesday, January 21, 2015 IC NO. SHEET 2 1 OF 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only GND IOSTEP CLK 1 HIGH EFFICIENCY, DUAL 18A STEP-DOWNm MODULE REGULATOR TECHNOLOGY R36 10K J2 VOUT2 TITLE: SCHEMATIC R38 OPT 2512 SUD50N03-09P Q1 OPT 2010 R35 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. 3 DIFFOUT VOUT1 DIFFP DIFFN 2 LOAD TRANSIENT CIRCUIT VOUT2S VOUT1S VO2+ VO2- DIFF SENSING SELECTION CUSTOMER NOTICE 0 OHm 0.5W 2010 R34 3 4 2 3 5 A B C D DEMO MANUAL DC1892A SCHEMATIC DIAGRAM dc1892afb 9 DEMO MANUAL DC1892A 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 10 Linear Technology Corporation dc1892afb LT 0115 REV B * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2013