LTC3111EDHD LINER

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15V, 1.5A Synchronous Buck-Boost DC/DC Converter Demonstration circuit 1999A is a fixed frequency syn- chronous buck-boost converter with an extended input and output range. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below, or equal to the output voltage. The LT C®3111 features selectable PWM or Burst Mode® operation, and an easily synchronizable oscillator. Jumper JP1 is provided to enable the converter. The demo board is configured for 800kHz. A jumper, JP2, is provided to select PWM, or Burst Mode operation. A clock signal can also be applied to JP2 if synchronization is desired. The LTC3111 operates with a 2.5V to 15V input voltage range and a VOUT range from 2.5V to 15V. The demon- stration board has been designed to operate with VIN from 2.5V to 15V and an output current up to 1.5A. For VIN < 5V, IOUT capability is reduced. VOUT is set to 5.0V. L, L T , L TC, L TM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. PERFORMANCE SUMMARY Typical demo board efficiency is shown in Figure 2 for several loads. The demo board has the provision to set an accurate run threshold. Consult the LTC3111data sheet for more information. The transient response of the converter to a 100mA to 600mA transient at input voltages of 3.5V and 12V are presented in Figures 3 and 4. The LTC3111 data sheet has detailed information about the operation, specifications, and applications of the part. The data sheet should be read in conjunction with this Quick Start Guide. Design files for this circuit board are available at http://www.linear.com/demo INPUT VOL TAGE RANGE 2.5V to 15V VOUT 5V IOUT 1.5A for VIN > 5V Specifications are at TA = 25°C

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C2 CAP CER 47µF 16V 20% X5R 1210 MURATA, GRM32ER61C476ME15L 2 3 C3, C10, C12 CAP CER 1µF 16V 10% X5R 0603 MURATA, GRM188R61C105KA93D 3 2 C4, C5 CAP CER 0.1µF 16V 10% X7R 0402 MURATA, GRM155R71C104KA88D 4 1 C6 CAP CER 22pF 50V 1% NP0 0402 MURATA, GJM1555C1H220FB01D 5 1 C7 CAP CER 1500pF 16V 10% 0402 AVX, 0402YC152KAT2A 6 1 C8 CAP CER 47pF 50V 5% NP0 0402 MURATA, GRM1555C1H470JZ01D 7 1 C9 CAP CER 100µF 16V 20% X5R 1210 TAIYO YUDEN, EMK325ABJ107MM-T 8 1 C11 CAP CER 100pF 50V 5% NP0 0402 MURATA, GRM1555C1H101JA01D 9 1 L1 INDUCTOR, 10µH COILCRAFT, XAL5050-103M 10 1 R1 RES 845k 1/16W 1% 0402 SMD PANASONIC, ERJ-2RKF8453X 11 1 R2 RES 158k 1/16W 1% 0402 SMD PANASONIC, ERJ-2RKF1583X 12 1 R3 RES 11.5k 1/16W 1% 0402 SMD PANASONIC, ERJ-2RKF1152X 13 1 R4 RES 41.2k 1/16W 1% 0402 SMD PANASONIC, ERJ-2RKF4122X 14 1 R5 RES 1.00M 1/16W 1% 0402 SMD PANASONIC, ERJ-2RKF1004X 15 1 R6 RES 0402 SMD (DNP) 16 1 R7 RES 49.9Ω 1/16W 1% 0402 SMD PANASONIC, ERJ-2RKF49R9X 17 1 U1 15V, 1.5A SYNCHRONOUS BUCK-BOOST DC/DC CONVERTER LINEAR TECH., LTC3111EDE #PBF Additional Demo Board Circuit Components 1 0 C1 (OPT) CAP, TANT LOW ESR 47µF 35V 20% SMD AVX, TPSE476M035R0200 Hardware-For Demo Board Only 1 5 E1-E5 TURRET, 0.09 DIA MILL-MAX, 2501-2-00-80-00-00-07-0 3 2 JP1, JP2 JMP, 3-PIN 1 ROW 0.079CC SAMTEC, TMM-103-02-L-S 4 2 XJP1, XJP2 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G 5 4 STAND OFF STAND-OFF, NYLON 0.375" TALL KEYSTONE, 8832 (SNAP ON)

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 A A B B C C D D E E 4 4 3 3 2 2 1 1 PWM 800kHz BURST OSC SYNC 1. ALL RESISTORS ARE IN OHMS, 0402. 2. INSTALL SHUNTS AS SHOWN. NOTE: UNLESS OTHERWISE SPECIFIED RUN RUN ON OFF TANT 1210 0603 1210 0603 0603 Vin > 5.0 V VIN VOUT VCC PWM/SYNC VCC PWM/SYNC RUN VIN RUN 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 3DEMO CIRCUIT 1999A 1 1 15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER N/A LTC3111EDE NC JB 2 - 6 - 14 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 3DEMO CIRCUIT 1999A 1 1 15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER N/A LTC3111EDE NC JB 2 - 6 - 14 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 3DEMO CIRCUIT 1999A 1 1 15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER N/A LTC3111EDE NC JB 2 - 6 - 14 GND GND C10 1uF C10 1uF 1500pF 1500pF VOUT 5.0V / 1.5A VOUT 5.0V / 1.5A C11 100pF C11 100pF 11.5K 11.5K GND GND GND GND +C1 OPT +C1 OPT 0.1uF 0.1uF JP2JP2 C12 1uF C12 1uF 100uF 16V 100uF 16VR1 845k 845k JP1JP1 C6 22pFC6 22pF 47pF 47pF 47uF 16V 47uF 16V 41.2K 41.2K DNP DNP 0.1uF 0.1uF 158K 158K VIN 2.5V - 15.0V VIN 2.5V - 15.0V 10uH 10uH LTC3111EDE LTC3111EDE SW16 NC 11 BST17 SGND 14 VIN5 VCC12 PWM/SYNC13 RUN4 SW2 9 SNSGND3 BST2 8 VOUT 10 COMP 1 FB 2 GND15 1uF 1uF 49.9 49.9

DEMO MANUAL DC1999A Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com  LINEAR TECHNOLOGY CORPORATION 2014 LT 0214 • PRINTED IN USA DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LT C) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LT C 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 LT C applica- tion engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation