DEMO MANUAL DC1818A LTM8001 36VIN, 5A Module Regulator with 5-Output Configurable LDO Array DESCRIPTION Demo circuit 1818A features the LTM8001 Module regulator that includes a 5A switching regulator and an array of five 1.1A low noise LDOs. DC1818A is configured so the switching regulator provides an output that also powers the LDOs. The LDOs in turn provide three outputs - one from a single LDO and two outputs each formed by paralleling two LDOs together. DC1818A supports changes to the LTM8001's user adjustable features including the output voltage of the switching regulator, output voltage of each of the five LDOs, switching frequency, soft-start period and output current limit of the switching regulator simply by modifying the appropriate resistors or capacitor. DC1818A also supports all current sharing or independent operation options of the LDOs. DC1818A includes a BNC connector for noise measurement of the LDO for VOUT1. An optional capacitor at C14 further reduces output noise. The LTM8001 data sheet must be read in conjunction with this demo manual to properly use or modify DC1818A. Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO Specifications are at TA = 25C dc1818af 1 DEMO MANUAL DC1818A PERFORMANCE SUMMARY PARAMETER CONDITIONS MIN TYP 6 Minimum Input Voltage, VIN 36 Maximum Input Voltage, VIN Regulator Output Voltage, VOUT0 MAX IOUT0 5A, IOUT1-5 = 0A, R9 = 19.6k Maximum Regulator Output Current, IOUT0 ILIM = VREF, IOUT1-5 = 0A UNITS V V 1.72 1.84 5 V A LDO1 Output Voltage, VOUT1 1mA IOUT1 700mA, R14 = 121k 1.16 1.25 V LDO2,3 Output Voltage, VOUT2,3 VOUT2 = VOUT3, SET2 = SET3, 2mA IOUT2,3 1.8A, R17 = 54.9k 1.04 1.13 V LDO4,5 Output Voltage, VOUT4,5 VOUT4 = VOUT5, SET4 = SET5, 2mA IOUT4,5 1.5A, R19 = 45.3k 0.86 VOUT0 Efficiency VIN = 12V, IOUT0 = 2.5A, IOUT1-5 = 0A 84 % Switching Frequency R7 = 118k 350 kHz 0.94 V QUICK START PROCEDURE Demo circuit 1818A is an easy way to evaluate the performance of the LTM8001. Refer to Figure 1 for the proper measurement equipment setup and follow the procedure below: NOTE: Do not hot-plug the VIN terminal at high input voltages. The absolute maximum voltage on VIN is 40V and hot-plugging a power supply through wire leads to the demonstration circuit can cause the voltage on the extremely low ESR ceramic input capacitor to ring to twice its DC value. In order to protect the LTM8001, an aluminum electrolytic capacitor with higher ESR is placed at the input terminals. This may protect against some, but not all, input transients due to a hot-plugged power supply. See Application Note 88 for more details. 1. Place JP1 for BIAS123 in the INTERNAL 3.4V position. 2. Connect the power supply (with power off), loads, and meters as shown in Figure 1. 3. After all connections are made, turn on the input power and verify that VOUT0 is 1.8V and the output voltages for VOUT1, VOUT2,3, and VOUT4,5 are 1.2V, 1.1V, and 0.9V respectively. NOTE: If VOUT0 is too low, temporarily disconnect the loads to make sure that the loads are not set too high. If VOUT1, VOUT2,3 or VOUT4,5 is too high, make sure the outputs are loaded by at least the LDO minimum load current of 1mA, 2mA and 2mA respectively. 4. Once the proper output voltages are established, adjust each load within its operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. NOTE: DC1818A includes an LTM8020 regulator to provide 3.4V bias voltages to the LDOs. The 3.4V bias supply can be disconnected using jumper JP1 to allow an external bias supply. dc1818af 2 DEMO MANUAL DC1818A QUICK START PROCEDURE Figure 1. Proper Measurement Equipment Setup dc1818af 3 DEMO MANUAL DC1818A QUICK START PROCEDURE 0 INTENSITY (dBm) -20 -40 -60 -80 -100 -120 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 FREQUENCY (MHz) dc1881a F02 Figure 2. VOUT1 Noise Spectrum (VOUT1 = 1.2V at 700mA, COUT1 = 22F, CSET1 = 1nF, VIN = 12V, VOUT0 = 1.8V Loaded to a Total Current of 5A) Figure 3. VOUT1 Ripple (VOUT1 = 1.2V at 700mA, COUT1 = 22F, CSET1 = 1nF, VIN = 12V, VOUT0 = 1.8V Loaded to a Total Current of 5A, 100MHz BW) dc1818af 4 DEMO MANUAL DC1818A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER SANYO, 4TPE470ML Required Circuit Components 1 1 COUT1 CAP., POSCAP, 470F, 4V, D3L 2 1 C1 Cap., X5R, 10F, 50V, 20% 1210 TAIYO YUDEN, UMK325BJ106M 3 1 C5 Cap., X7R, 1000pF, 50V, 20% 0603 AVX, 06035C102MAT2A 4 1 C8 Cap., X5R, 100F, 6.3V, 20%, 1210 TAIYO YUDEN, JMK325ABJ107MM-T 5 5 C9-C13 Cap., X5R, 2.2F, 10V, 10%, 0805 TAIYO YUDEN, LMK212BJ225KG-T 6 1 R7 RES., CHIP, 118k, 1%, 0603 VISHAY, CRCW0603118KFKEA 7 1 R9 RES., CHIP, 19.6k, 1%, 0402 VISHAY, CRCW040219K6FKED 8 1 R14 RES., CHIP, 121k, 1%, 0402 VISHAY, CRCW0402121KFKED 9 1 R17 RES., CHIP, 54.9k, 1%, 0402 VISHAY, CRCW040254K9FKED 10 1 R19 RES., CHIP, 45.3k, 1%, 0402 VISHAY, CRCW040245K3FKED 11 1 U1 IC, LTM8001EY, BGA, 15mmX15mmX3.42mm LINEAR TECH. LTM8001EY Additional Demo Board Circuit Components 1 0 CIN1 CAP., ALUM, 100F, 50V SUN ELECT, 50CE100LX 2 0 C2, C3 Cap., X5R, 1F, 10V , 20% 0603 TAIYO YUDEN, LMK107BJ105MA-T 3 0 C4 Cap., X5R, 10F, 50V, 20% 1210 TAIYO YUDEN, UMK325BJ106M 4 0 C6 Cap., X7R, 100pF, 25V, 10%, 0603 AVX, 06033C101KAT2A 5 0 C14 Cap., 0603 6 0 C15 Cap., X5R, 2.2F, 50V, 20%, 1206 TAIYO YUDEN, UMK316BJ225MD-T 7 0 C16 Cap., X5R, 10F, 6.3V, 10%, 1206 TAIYO YUDEN, JMK316BJ106KL-T 8 0 R1 RES., CHIP, 121k, 1%, 0603 VISHAY, CRCW0603121KFKEA 9 0 R2, R10, R20 RES., CHIP, 0, 1206 VISHAY, CRCW12060000Z0EA 10 0 R3 RES., CHIP, 107k, 1%, 0603 VISHAY, CRCW0603107KFKEA 11 0 R4 RES., CHIP, 174k, 1%, 0603 VISHAY, CRCW0603174KFKEA 12 0 R5 RES., CHIP, 100k, 5%, 0603 VISHAY, CRCW0603100KJNEA 13 0 R6, R11, R13 RES., CHIP, 0603 14 0 R8, R12, R16, R22 RES., CHIP, 0, 0603 15 0 R15, R18 RES., CHIP, 0402 16 0 R21 RES., CHIP, 287k, 1%, 0603 VISHAY, CRCW0603287KFKED 17 0 U2 IC, LTM8020EV, LGA, 6.25mmx6.25x2.32mm LINEAR TECH. LTM8020EV VISHAY, CRCW06030000Z0EA Hardware: For Demo Board Only 1 21 E1-E21 TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0 2 1 JP1 Header, 3 Pins 2mm Ctrs. SAMTEC, TMM-103-02-L-S 3 1 JP1 SHUNT SAMTEC, 2SN-BK-G 4 1 J1 CONN, BNC, 5 PINS C0NNEX, 112404 5 4 MH1-MH4 STAND-OFF, NYLON 0.5" Tall KEYSTONE, 8833 (SNAP ON) dc1818af 5 VOUT1 GND SYNC ILIM COMP BIAS45 BIAS123 RUN GND E9 E8 E7 E6 E5 E4 E3 E2 VIN E1 6V - 36V C6 100pF 0603 BIAS123 RUN 1 J1 C5 0603 1nF R4 174k R3 107k R1 121k R9 0402 19.6k R8 0 350kHz R7 118k 100k 5% 10V 1uF R5 0603 10V C3 1uF R6 (OPT) R2 0 1206 0603 CIN1 100uF 50V C2 + VIN A1 A2 B1 B2 B9 B10 C1 C2 C8 C9 C10 L5 K7 L7 L8 K8 K4 L6 A8 B8 L4 GND GND GND GND GND GND GND GND GND GND GND FBO SYNC RT ILIM VREF SS COMP BIAS45 BIAS123 RUN C1 10uF 50V 1210 L3 L2 L1 K3 K2 K1 J3 J2 J1 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 10uF 50V 1210 A6 A7 B6 B7 C6 C7 U1 LTM8001EY VIN45 VIN45 VIN45 VIN45 VIN45 VIN45 A3 A4 A5 B3 B4 B5 C3 C4 C5 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 C13 C14 A10 VOUT5 A11 VOUT5 L9 GND GND GND GND GND GND GND GND GND GND GND SET5 SET4 SET3 SET2 K10 K9 K6 K5 J10 J9 J8 J7 J6 J5 J4 A9 D11 G11 (OPT) 2.2uF 10V 2.2uF 10V 2.2uF 10V 2.2uF 10V R19 45.3k 0402 R18 (OPT) R17 54.9k 0402 R15 (OPT) R14 121k 0402 VOUT1 R10 0 1206 E21 E20 E19 E18 E17 E16 E15 E14 E13 E12 E11 E10 GND GND VOUT5 VOUT4 0.9V 1.5A GND VOUT3 VOUT2 1.1V 1.8A GND VOUT1 1.2V 700mA GND VOUT0 1.8V 1A VIN45 2. ALL CAPACITORS ARE 0805 1. ALL RESISTORS ARE 0603 1% NOTE: UNLESS OTHERWISE SPECIFIED R16 0 R13 (OPT) R12 0 C12 B11 VOUT4 C11 VOUT4 H11 C11 E11 VOUT3 F11 VOUT3 SET1 C10 J11 VOUT2 K11 VOUT2 2.2uF 10V 470uF 4V + COUT1 C9 R11 (OPT) C8 100uF 1210 6.3V L10 VOUT1 L11 VOUT1 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 GND GND GND GND GND GND GND GND GND D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 E1 E2 E3 E4 E5 E6 E7 E8 E9 E10 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 6 2 3 4 5 C4 DEMO MANUAL DC1818A SCHEMATIC DIAGRAM dc1818af DEMO MANUAL DC1818A SCHEMATIC DIAGRAM VOUT SHDN C5 C3 R22 0 C16 10uF 6.3V 1206 ADJ BIAS JP1 BIAS123 C4 2 VOUT C1 B5 3 VOUT B4 BIAS123 EXTERNAL VOUT A5 1 VIN VOUT INTERNAL 3.4V A2 GND GND GND GND GND GND GND GND GND GND RUN C15 2.2uF 50V 1206 VIN C2 D1 D2 D3 D4 D5 E2 E3 E4 E5 1206 A1 A4 E1 R20 0 VIN VOUT U2 LTM8020EV R21 287k dc1818af 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. 7 DEMO MANUAL DC1818A 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 dc1818af 8 Linear Technology Corporation LT 0213 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2013