LTM4618EV

LTM4618EV LINER | Alldatasheet

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LTM4618EV: 6A Step-Down Power µModule Regulator Demonstration circuit 1472 features the L TM ®4618EV μModule® regulator , a complete high effi ciency synchro- nous buck regulator . The DC1472 input range is from 4.5V to 26.5V and is capable of delivering up to 6A of output current. However , current derating may be necessary under certain V IN, VOUT, frequency and thermal conditions. The output voltage for the board is jumper programmable from 1.2V to 5V and can be set as low as 0.8V , the reference voltage of the L TM4618EV . Layout is simple, requiring only a few bulk input and output capacitors externally. The TRACK/SS pin allows the user to program the output voltage ramp-up and ramp-down, as well as coincidentally or ratiometrically track an external voltage. The L TM4618EV may be enabled or disabled by the RUN pin. The MODE jumper (JP3) is available to select L, L T , L TC, L TM, μModule, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO from pulse-skipping or Burst Mode® operation for improved effi ciency at light load. DC1472 has a default switching frequency of 500 kHz and is synchronizable to an external clock from 250 kHz up to 750 kHz. These features and the availability of the L TM4618EV in a compact 9mm × 15mm × 4.32mm LGA package make the demonstration circuit ideal for use in many high density point-of-load regula- tion applications. The L TM4618 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit 1472A. Design fi les for this circuit board are available at http://www.linear .com/demo

PARAMETER CONDITIONS/NOTES VALUE Input Voltage Range 4.5V to 26.5V Maximum Continuous Output Current Derating is Necessary for Certain Operating Conditions. See Data Sheet for Details 6ADC Default Operating Frequency R3 = 10kΩ, R4 = 3.16kΩ 500kHz External Clock Sync. Frequency Range 250kHz to 750kHz Effi ciency V IN = 12V , VOUT = 2.5V , IOUT = 6A 88.7% See Figure 2 Demonstration circuit 1472 is easy to set up to evaluate the performance of the L TM4618EV . Please refer to Figure 1 for proper measurement equipment setup and follow the procedure below. 1. With power off, connect the input power supply, load and meters as shown in Figure 1. Preset the load to 0A and V IN supply to be 0V . Place jumpers in the following positions for a typical 1.5VOUT application: JP6 JP3 JP4 JP2 VOUT Select MODE RUN TRACK/SS 1.5V CCM OFF SS 2. Turn on the power at the input. Increase V IN to 12V (Caution: Do not hot plug the input supply or apply more than the rated maximum voltage of 26.5V to the board or the part may be damaged). 3. Set the RUN pin jumper (JP4) to the on position. The output voltage should rise to 1.5V . The output voltage meter should read the selected output voltage ±2%. 4. Vary the input voltage from 6V to 24V and adjust the load current from 0A to 6A. The output voltage meter should read the selected output voltage ±2%. Set the input voltage to 12V and the load current to 6A. 5. Measure the output voltage ripple at J5 with a BNC cable and oscilloscope. 6. To set the output voltage to 5V , turn off the input supply power , apply the following changes listed below and repeat steps 2 to 5: JP10 JP3 JP4 JP2 VOUT Select MODE RUN TRACK/SS 5V CCM OFF SS 7. Set the load current to 0A. Set the RUN pin jumper (JP4) to the OFF position. Power off the input supply. 8. For load transient tests, apply an adjustable positive pulse signal between IOSTEP CLK and GND test points. The pulse amplitude sets the load step current amplitude. The pulse width should be short (<1ms) and pulse duty cycle should be low (<15%) to limit the thermal stress on the load transient circuit. The load step current can be monitored with a BNC connected to J6 (10mV/A).

Figure 1. Proper Measurement Equipment Setup

Figure 2. Measured Supply Effi ciency at 12VIN and 24VIN

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C5 CAP , 150μF 35V , ALUM SANYO, 35ME150WXV+TS 2 2 C6, C7 CAP , X5R, 10μF 35V , 1210 TAIYO YUDEN, GMK325BJ106MN-T 3 1 C12 CAP , X5R, 47μF 10V , 1210 TDK, C3225X5R1A476M 4 1 C14 CAP , POSCAP, 330μF 6.3V , 7343 SANYO, 6TPC330MA 5 1 C15 CAP , X5R, 1μF 10V , 0805 AVX, 0805ZD105MAT2A 6 1 C20 CAP , X7R, 0.1μF 16V , 0603 AVX, 0603YC104KAT2A 7 1 R1 RES., 121k 1/16W 1%, 0603 VISHAY, CRCW0603121KFKEA 8 4 R3, R11 RES., 10k 1/16W 1%, 0603 VISHAY, CRCW060310K0FKEA 9 1 R4 RES., 3.16k 1/16W 1%, 0603 VISHAY, CRCW06033K16FKEA 10 1 R5 RES., 60.4k 1/16W 1%, 0603 VISHAY, CRCW060360K4FKEA 11 1 R14 RES., 69.8k 1/16W 1%, 0603 VISHAY, CRCW060369K8FKEA 12 1 R16 RES., 48.7k 1/16W 1%, 0603 VISHAY, CRCW060348K7FKEA 13 1 R17 RES., 28.7k 1/16W 1%, 0603 VISHAY, CRCW060328K7FKEA 14 1 R18 RES., 19.1k 1/16W 1%, 0603 VISHAY, CRCW060319K1FKEA 15 1 R19 RES., 11.5k 1/16W 1%, 0603 VISHAY, CRCW060311K5FKEA 16 1 U1 IC, L TM4618EV LINEAR TECH., L TM4618EV LGA Additional Demo Board Circuit Components 1 0 C1-C4, C16, C19, C21-C24 CAP , 0603 Optional 2 0 C8, C9, C10, C11, C13 CAP , 1210 Optional 3 2 C17, C18 CAP , X5R, 1μF 10V , 0603 TAIYO YUDEN, LMK107BJ105MA-T 4 0 R6, R8, R10, R12 RES, 0603 Optional 5 4 R7 RES., 10k 1/16W 1%, 0603 VISHAY, CRCW060310K0FKEA 6 1 R9 RES., 0.01Ω 5% 1W , 2512 IRC, LRC-LRF2512LF-01-R010-J 7 1 R15 RES., 10k 1/16W 1%, 0603 VISHAY, CRCW060310K0FKEA 8 1 R2 RES., 100k 1/16W 1%, 0603 VISHAY, CRCW0603100KFKEA 9 1 R13 RES., CHIP , 0, 1/16W , 0603 VISHAY, CRCW06030000Z0EA 10 1 D1 DIODE, ZENER 350MW 4.7V , SOT-23 DIODES INC., BZX84C4V7-7-F 11 1 Q1 XSTR, SUD50N03-10CP MOSFET SILICONIX, SUD50N03-10CP Hardware 1 10 E1-E10 TP , TURRET , 0.094", PBF MILL-MAX, 2501-2-00-80-00-00-07-0 2 3 JP1, JP2, JP4 JMP , 1X3, 0.079" SAMTEC, TMM-103-02-L-S 3 1 JP3 JMP , 1X4, 0.079" SAMTEC, TMM-104-02-L-S 4 6 JP5, JP6, JP7, JP8, JP9, JP10 JMP , 1X2, 0.079" SAMTEC, TMM-102-02-L-S 5 4 J1, J2, J3, J4 JACK, BANANA KEYSTONE, 575-4 6 2 J5, J6 CONN, BNC, 5 PINS CONNEX, 112404 7 5 JP1-JP4, JP6 SHUNT , 0.079" CENTER SAMTEC, 2SN-BK-G 8 4 4 Corners STANDOFF , SNAP ON, 0.50" KEYSTONE, 8833

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. SCHEMATIC DIAGRAM D D C C B B A A 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTE: UNLESS OTHERWISE SPECIFIED 2. INSTALL SHUNTS AS SHOWN. FSW = 500KHz VOUT VIN INTVCC VIN INTVCC INTVCC SIZE DATE: IC NO. REV. SHEET OF TITLE: APPROVALS PCB DES. APP ENG. TECHNOLOGY Fax: (408)434-0507 Milpitas, CA 95035 Phone: (408)432-1900 1630 McCarthy Blvd. LTC Confidential-For Customer Use Only 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 SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE www.linear.com Monday, March 15, 2010 11 HIGH DENSITY 6A STEP-DOWN POWER uMODULE KT SAM Y. N/A LTM4618EV DEMO CIRCUIT 1472A SIZE DATE: IC NO. REV. SHEET OF TITLE: APPROVALS PCB DES. APP ENG. TECHNOLOGY Fax: (408)434-0507 Milpitas, CA 95035 Phone: (408)432-1900 1630 McCarthy Blvd. LTC Confidential-For Customer Use Only 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 SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE www.linear.com Monday, March 15, 2010 11 HIGH DENSITY 6A STEP-DOWN POWER uMODULE KT SAM Y. N/A LTM4618EV DEMO CIRCUIT 1472A SIZE DATE: IC NO. REV. SHEET OF TITLE: APPROVALS PCB DES. APP ENG. TECHNOLOGY Fax: (408)434-0507 Milpitas, CA 95035 Phone: (408)432-1900 1630 McCarthy Blvd. LTC Confidential-For Customer Use Only 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 SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE www.linear.com Monday, March 15, 2010 11 HIGH DENSITY 6A STEP-DOWN POWER uMODULE KT SAM Y. N/A LTM4618EV DEMO CIRCUIT 1472A

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV SAM Y.PRODUCTION2 03-15-10 DESCRIPTION DATE APPROVEDECO REV SAM Y.PRODUCTION2 03-15-10 DESCRIPTION DATE APPROVEDECO REV SAM Y.PRODUCTION2 03-15-10 IOSTEP IOSTEP R19 11.5k R19 11.5k 10uF 35V 1210 10uF 35V 1210 JP8 2.5V JP8 2.5V EXTVCC EXTVCC R18 19.1k R18 19.1k C16 OPT C16 OPT 10k 10k C13 OPT 1210 C13 OPT 1210 JP7 1.8V JP7 1.8V C17 1uF 10V C17 1uF 10V TP1TP1 C19 OPT C19 OPT R17 28.7k R17 28.7k R11 10k R11 10k OPT OPT C20 0.1uF C20 0.1uF TRACK TRACK 0.01 2512 0.01 2512 JP5 1.2V JP5 1.2V PGOOD PGOOD R16 48.7k R16 48.7k JP4 RUN OFF ON JP4 RUN OFF ON 1 VOUT 6A MAX VOUT 6A MAX OPT OPT SGND SGND J1VIN 4.5V - 26.5V J1VIN 4.5V - 26.5V OPT OPT C12 47uF 10V 1210 C12 47uF 10V 1210 VIN VIN LTM4618EV LTM4618EV GNDA4 GNDF6 GNDF7 GNDF5GNDF4GNDF3GNDF2GNDF1 GND G7GND G6 NC A1 INTVCCD3 GND G5GND G4 GNDE4 VINA5 SWK6 VINA6 VINA7 VOUT J1 VOUT J2 VINB5 VINB6 VINB7 VINC5 VINC6 VINC7 VOUT J3 VOUT J4 PLLFLTRA2 TRACK/SSB1 VOUT K1 VOUT K2 VOUT K3 RUNB2 VFB D1 GNDE3 PGOODD2 GNDE2 GNDE1 VOUT K4 VOUT L1 VOUT L2 GNDD7 GNDD6 GNDD5 GNDD4 GNDB4 GND G3GND G2GND G1 VOUT L3 VOUT L4 VOUT M1 VOUT M2 VOUT M3 VOUT M4 GNDE5 GNDE6 GNDE7 GND H1 GND H2 GND H3 GND H4 GND H5 GND H6 GND H7 GND J5 GND J6 GND J7 GND K5 GND K7 GND L5 GND L6 GND L7 GND M5 GND M6 GND M7 SGNDB3 SGNDC2 SGNDC3 PLLIN A3 COMPC1 EXTVCCC4 C15 1uF 10V 0805 C15 1uF 10V 0805 JP6 1.5V JP6 1.5V VOUT VOUT R14 69.8k R14 69.8k 1210 OPT 1210 OPT +C14 330uF 6.3V 7343 +C14 330uF 6.3V 7343 60.4k 60.4k 100k 100k C11 OPT 1210 C11 OPT 1210 3.16k 3.16k JP2 TRACK/SS TRACK SS JP2 TRACK/SS TRACK SS 1 10uF 35V 1210 10uF 35V 1210 OPT OPT JP1 FREQ EXT CLK INT CLK JP1 FREQ EXT CLK INT CLK1 C23 OPT C23 OPT C18 1uF 10V C18 1uF 10V GND GND C10 OPT 1210 C10 OPT 1210 1210 OPT 1210 OPT OPT OPT +C5 150uF 35V SANYO +C5 150uF 35V SANYO 121k 121k BZX84C4V7 BZX84C4V7 3 1 10k 10k E10 CLKIN E10 CLKIN JP3 CCM BURST/EXT CLK PULSE SKIP MODE/CLK SEL JP3 CCM BURST/EXT CLK PULSE SKIP MODE/CLK SEL1 R12 OPT R12 OPT R15 10k R15 10k OPT OPT JP10 JP10 SUD50N03 SUD50N03 C22 OPT C22 OPT R10 OPT R10 OPT C21 OPT C21 OPT GND GND IOSTEP CLK IOSTEP CLK VOUT VOUT GND GND C24 OPT C24 OPT JP9 3.3V JP9 3.3V GND GND R13 R13

Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com © LINEAR TECHNOLOGY CORPORA TION 2010 LT 1010 • PRINTED IN USA DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (L TC) 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 ONL Y and is not provided by L TC 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 direc- tive 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 L TC fro m 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 co mpliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. L TC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. L TC 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 L TC applica- tion engineer . Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation