BD8306MUV-EVK-001

User’s Guide Switching Regulator Series 1ch Buck-Boost DC/DC Converter BD8306MUV EVK BD8306MUV-EVK-001 (3.7V→3.3V, 1A) Introduction This user’s guide will provide the steps necessary to operate and evaluate the BD8306MUV Buck-Boost DC/DC Converter. Component selection, operating procedures and application data are included in this document. Description BD8306MUV-EVK-001 uses ROHM’s highly-efficient Buck-Boost DC/DC Converter IC BD8306MUV and outputs 3.3V from 2.8V to 5.5V input voltage with one coil. This IC adopts the original Buck-Boost drive system and creates a more efficient power supply than the conventional SEPIC-system or H-bridge system switching regulators. A fixed Soft Start circuit prevents inrush current during startup along with UVLO (Under Voltage Lock Out) and TSD (Thermal Shutdown Detection), OCP (Over Current Protection) protection circuits. The Under Voltage Lock Out and hysteresis can be set by external resistor using STB pin. STB pin allows for simple ON/OFF control of the IC to reduce standby current consumption. Application General Portable Equipment DSC DVC Cellular Phone PDA LED Operating Limits Parameter Input Voltage Output Voltage Min Typ Max Units 2.8 3.7 5.5 V 3.3 Conditions V Output Current Range 1.0 A VCC>2.8V Operating Frequency 1.0 MHz UVLO Detect Voltage 1.6 V VCC sweep down UVLO Release Voltage 1.7 V VCC sweep up © 2020 ROHM Co., Ltd. 1/6 No. 63UG032E Rev.001 JUN.2020 BD8306MUV-EVK-001 User’s Guide EVK Figure 1. BD8306MUV-EVK-001 EVK Schematic VIN3=12V Figure 2. BD8306MUV-EVK-001 Schematic Operating Procedure 1. Turn off the power supply and connect power supply’s GND pin to the GND3 pin of the EVK. 2. Connect the power supply’s VCC pin to the VBAT pin of the EVK. 3. Connect the jumper of SW1 to the left short position. (The VBAT pin input voltage is input to the STB pin.) 4. Check if the electronic load is turned off and connect the electronic load to the VOUT pin and the GND2 pin of the EVK. 5. Connect the voltmeter to the VOUT pin and the GND2 pin of the EVK. 6. Turn on the power supply and check if the measured value of the voltmeter is 3.3V. 7. Turn on the electronic load. Notes: The board does not support hot plugging protection. Do not perform hot plugging on this board. © 2020 ROHM Co., Ltd. 2/6 No. 63UG032E Rev.001 JUN.2020 BD8306MUV-EVK-001 User’s Guide SW Condition Table Table 1. SW1 Condition Table Condution Left short Right short Content VBAT pin and STB pin are short-circuited GND and STB pin are short-circuited BOM Table 2. Bill of Materials No. IC U1 Capacitor CBAT1 CBAT2 COUT1 COUT2 CC CFB CVCC Resistor RC RFB RINV1 RINV2 RT RVBAT Inductor L1 Switch SW1 Value Description Part No. Manufactuer - Buck-Boost DC/DC BD8306MUV ROHM 10μF 10μF 120pF 2200pF 1μF Capacitor, Chip, Not installed Capacitor, Chip, Not installed Capacitor, Chip, Capacitor, Chip, Capacitor, Chip, - - 4.7kΩ 4.7kΩ 56kΩ 10kΩ 39kΩ Short Resistor, Resistor, Resistor, Resistor, Resistor, - - - 4.7μH Inductor, 1.35A 1231AS-H-4R7M Murata - Pin header, 2.54mm x3contacts 61300311121 Wurth Elektronik © 2020 ROHM Co., Ltd. Chip, Chip, Chip, Chip, Chip, 10V, B 10V, B 50V, CH 50V, B 50V, B 50V,　0.063W, 50V,　0.063W, 50V,　0.063W, 50V,　0.063W, 50V,　0.063W, 3/6 ±1% ±1% ±1% ±1% ±1% No. 63UG032E Rev.001 JUN.2020 BD8306MUV-EVK-001 User’s Guide Board Layout EVK PCB information Number of Layers 4 Material Board Size FR-4 40mm x 40mm x 1.6mmt Copper Thickness 1oz (35μm) Followings are the layout of BD8306MUV-EVK-001. Figure 3. Top Layer Layout Figure 4. Middle1 Layer Layout (Top View) (Top View) Figure 5. Middle2 Layer Layout Figure 6. Bottom Layer Layout (Top View) (Top View) © 2020 ROHM Co., Ltd. 4/6 No. 63UG032E Rev.001 JUN.2020 BD8306MUV-EVK-001 User’s Guide Reference Application Data Figure 7. Total Efficiency vs Output Current Figure 8. Output Voltage vs Power Supply Voltage (Power Conversion Efficiency) (Output Current = 500mA) Figure 9. Output Voltage vs Output Current Figure 10. Output Current Response (Output Current = 100mA ⇔ 500mA 5msec/div) © 2020 ROHM Co., Ltd. 5/6 No. 63UG032E Rev.001 JUN.2020 BD8306MUV-EVK-001 User’s Guide Revision History Date 22. Jun. 2020 Revision Number 001 © 2020 ROHM Co., Ltd. Description Initial release 6/6 No. 63UG032E Rev.001 JUN.2020 Notice Notes 1) The information contained herein is subject to change without notice. 2) Before you use our Products, please contact our sales representative and verify the latest specifications : 3) Although ROHM is continuously working to improve product reliability and quality, semiconductors can break down and malfunction due to various factors. Therefore, in order to prevent personal injury or fire arising from failure, please take safety measures such as complying with the derating characteristics, implementing redundant and fire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have no responsibility for any damages arising out of the use of our Poducts beyond the rating specified by ROHM. 4) Examples of application circuits, circuit constants and any other information contained herein are provided only to illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. 5) The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM or any other parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of such technical information. 6) The Products specified in this document are not designed to be radiation tolerant. 7) For use of our Products in applications requiring a high degree of reliability (as exemplified below), please contact and consult with a ROHM representative : transportation equipment (i.e. cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety equipment, medical systems, servers, solar cells, and power transmission systems. 8) Do not use our Products in applications requiring extremely high reliability, such as aerospace equipment, nuclear power control systems, and submarine repeaters. 9) ROHM shall have no responsibility for any damages or injury arising from non-compliance with the recommended usage conditions and specifications contained herein. 10) ROHM has used reasonable care to ensurH the accuracy of the information contained in this document. However, ROHM does not warrants that such information is error-free, and ROHM shall have no responsibility for any damages arising from any inaccuracy or misprint of such information. 11) Please use the Products in accordance with any applicable environmental laws and regulations, such as the RoHS Directive. For more details, including RoHS compatibility, please contact a ROHM sales office. ROHM shall have no responsibility for any damages or losses resulting non-compliance with any applicable laws or regulations. 12) When providing our Products and technologies contained in this document to other countries, you must abide by the procedures and provisions stipulated in all applicable export laws and regulations, including without limitation the US Export Administration Regulations and the Foreign Exchange and Foreign Trade Act. 13) This document, in part or in whole, may not be reprinted or reproduced without prior consent of ROHM. 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