LT8606 LINER | Alldatasheet

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42V, 0.35A Micropower Synchronous Step-Down Regulator Demonstration Circuit 2564A is a 42V, 0.35A micropower synchronous step-down regulator featuring the LT®8606. The demo board is designed for 5V output from a 5.5V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and indus - trial supplies. The LT8606 is a compact, high efficiency, high speed synchronous monolithic step-down switch - ing regulator that consumes less than 3μA of quiescent current when output is regulated at 5V. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8606 to minimize external components and simplify design. The SYNC pin on the demo board is grounded by default for low ripple Burst Mode® operation. Move JP1 to PULSE SKIPPING position can change the operation mode to pulse-skipping operation. Once JP1 is on SPREAD SPEC- TRUM position, VCC is applied to the SYNC pin for low EMI spread spectrum operation. To synchronous to an external clock, move JP1 to SYNC and apply the external L, L T , L TC, L TM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. PERFORMANCE SUMMARY clock to the SYNC turret. Figure 1 shows the efficiency of the circuit. The demo board has an EMI filter installed. The radiated EMI performances of the board (with EMI filter) are shown in Figures 2 and 3. The red/green lines in Figures 2 and 3 are CISPR25 Class 5 peak/average limit. To use the EMI filter , the input should be tied to VEMI, not VIN. An inductor L2, which is a 0Ω jumper on the board by default now, can be added in the EMI filter to further reduce the conducted emission. The LT8606 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo manual for DC2564A. Design files for this circuit board are available at http://www.linear .com/demo/DC2564A Specifications are at TA = 25°C SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Input Voltage Range 5.5 42 V VOUT Output Voltage 4.8 5 5.2 V IOUT Maximum Output Current 0.35 A fSW Switching Frequency 1.85 2 2.15 MHz EFE Efficiency at DC VIN = 12V, IOUT = 0.35A 92.1 %

  1. Set an input power supply that is capable of 42V/0.35A.
  2. With power off, connect the supply to the input terminals
  3. Turn on the power at the input.
  4. Check for the proper output voltage of 5V. Turn off the
  5. Once the proper output voltage is established, connect

output terminals VOUT and GND. Set the current for 0A. to measure the DC2564A’s output current.

  1. Turn on the power at the input.

load to make sure that the load is not set too high.

  1. Once the proper output voltage is established again,

age, efficiency and other desired parameters.

  1. An external clock can be added to the SYNC terminal

frequency. See the data sheet section, Synchronization. Figure 1. Efficiency vs Load Current at 2MHz Switching Frequency

Figure 2. LT8606 Demo Circuit EMI Performance in CISPR25 Radiated Emission Test, Antenna Polarization:

Figure 3. LT8606 Demo Circuit EMI Performance in CISPR25 Radiated Emission Test, Antenna Polarization:

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C2 CAP ., X7R, 1µF, 50V, 10% 0805 MURATA, GRM21BR71H105KA12L 2 1 C4 CAP ., X7R, 0.22µF, 16V, 10%, 0603 MURATA, GRM188R71C224KA01D 3 1 C5 CAP ., C0G, 10pF, 25V, 5%, 0603 AVX, 06033A100JAT2A 4 1 C6 CAP ., X7R, 10µF, 10V, 10%, 0805 MURATA, GRM21BR71A106KE51K 5 1 C7 CAP ., X7R, 1µF, 25V, 10%, 0603 MURATA, GRM188R71E105KA12D 6 1 C8 CAP ., X7R, 0.01µF, 16V, 10%, 0603 MURATA, GRM188R71C103KA01D 7 1 L1 IND., 4.7µH WURTH ELECTRONICS, 74438336047 8 1 R2 RES., CHIP , 18.2k, 1/10W, 1%, 0603 VISHAY, CRCW060318K2FKEA 9 1 R3 RES., CHIP , 49.9k, 1/10W, 1%, 0603 VISHAY, CRCW060349K9FKEA 10 2 R1, R4 RES., CHIP , 1M, 1/10W, 1%, 0603 VISHAY, CRCW06031M00FKEA 11 1 R5 RES., CHIP , 187k, 1/10W, 1%, 0603 VISHAY, CRCW0603187KFKEA 12 1 U1 IC, REGULATOR, MSE10 LINEAR TECH., LT8606EMSE#PBF Additional Demo Board Circuit Components 1 1 C1 CAP ., ALUM 22µF 63V SUN ELECT , 63CE22BS 2 3 C3, C10, C11 CAP ., X7R, 1µF, 50V, 10% 0805 MURATA, GRM21BR71H105KA12L 3 1 C9 CAP ., X7R, 4.7µF, 16V, 10%, 0805 MURATA, GRM21BR71C475K73L 4 2 C12, C13 CAP ., X7R, 0.1µF, 50V, 10%, 0603 MURATA, GRM188R71H104KA93D 5 1 FB1 FERRITE BEAD 0805 TDK, MPZ2012S331AT000 6 1 L2 RES., CHIP , 0Ω, 3/4W, 2010 VISHAY, CRCW20100000Z0EF 7 0 R6 (OPT .) RES., 0603 Hardware: For Demo Board Only 1 9 E1 - E9 TESTPOINT , TURRET , 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0 2 1 E10 (OPT .) TESTPOINT , TURRET , 0.094" 3 1 JP1 DOUBLE ROW HEADER 2 x 4 0.079" WURTH ELECTRONICS, 62000821121 4 1 XJP1 SHUNT , 0.079" CENTER WURTH ELECTRONICS, 60800213421 5 4 MH1-MH4 STAND-OFF , NYLON 0.50" TALL WURTH ELECTRONICS, 702935000

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 representa- tion 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 ALL CAPACITORS ARE 0603. NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE 0603. SUNCON 63CE22BS (2MHz) SYNC SPREAD SPECTRUM PULSE SKIPPING BURST VOUT VCC VCC TR/SS C12 0.1µF 50V (Opt) 10pF 187k C10 1µF 50V 0805 10µF 10V 0805 JP1 1 2 1.00M 1.00M E6EN/UV LT8606EMSE VIN9 EN/UV10 SYNC5 VCC3 TR/SS7 RT4 FB 6 PG 8 SW 2 BST 1 GND11 22µF 63V C13 0.1µF 50V 1µF 1µF 50V 0805 GND SYNC C11 1µF 50V 0805 4.7µH 74438336047 E10 VIN 5.5V - 42V 18.2k FB1 MPZ2012S331AT000 GND 0.22µF 0 2010 PG VOUT 5V / 0.35A 0.01µF 49.9k GND 1µF 50V 0805 VEMI 5.5V - 42V 4.7µF 16V 0805

DEMO MANUAL DC2564A  LINEAR TECHNOLOGY CORPORATION 2017 LT 0417 • PRINTED IN USA 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 © 2004, Linear Technology Corporation