DC/DC Converter Application Information IC Product Name BD9328EFJ-LB Topology Buck (Step-Down) Switching Regulator Type Non-Isolation Input Output 1 4.2V to 18V 1.0V, 2.0A 2 4.2V to 18V 1.2V, 2.0A 3 4.2V to 18V 1.5V, 2.0A 4 4.2V to 18V 1.8V, 2.0A 5 4.8V to 18V 3.3V, 2.0A 6 7.2V to 18V 5.0V, 2.0A 7 12.9V to 18V 9.0V, 2.0A www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. 1/6 15.May.2015 Rev.001 Application Note BD9328EFJ-LB ■ Typical Application Circuit C6 FB 5 COMP 6 EN 7 SS 8 R1 3 SW 2 VIN 4 GND EPAD 9 1 BST U1 BD9328EFJ- LB R2 R3 C5 C1 VIN C4 L1 VOUT C2 C3 ■ EN terminal setting (7-pin) Terminal state IC operation ≥ 1.4V Normal operation ≤ 1.0V Power down ■ Output voltage setting 0.9 Input/output voltage conditions are required to satisfy the following equations: 0.9 ~ www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. 0.7 2/6 15.May.2015 Rev.001 Application Note BD9328EFJ-LB ■ Bill of Materials 1. VO=1.0V (VIN =4.2V to 18V) Count Reference Designator Type Value Description 1 C1 Ceramic Capacitor 10µF 35V, B, ±10% 1 C2 Ceramic Capacitor 22µF 4V, B, ±20% 0 C3 Ceramic Capacitor n/a 2 C4, C5 Ceramic Capacitor 1 C6 Ceramic Capacitor 1 L1 Inductor 0.1µF - Manufacturer Part Number Manufacturer Configuration (mm) GRM32EB3YA106KA12 MURATA 3225 GRM219B30G226ME66 MURATA 2012 - - - 16V, B, ±10% GRM188B11C104KA01 MURATA 1608 0.022μF 16V, B, ±10% GRM155B11C223KA01 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 10µH ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M TAIYO YUDEN 6060 TDK 7269 ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 WÜRTH 7373 ROHM 1005 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) 1 R1 Resistor 3kΩ 0.063W, 50V, 1% MCR01MZPF3001 1 R2 Resistor 27kΩ 0.063W, 50V, 1% MCR01MZPF2702 ROHM 1005 1 R3 Resistor 1kΩ 0.063W, 50V, 5% MCR01MZPJ102 ROHM 1005 1 U1 IC - Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 Manufacturer Configuration (mm) GRM32EB3YA106KA12 MURATA 3225 GRM219B30G226ME66 MURATA 2012 - - 2. VO=1.2V (VIN =4.2V to 18V) Count Reference Designator Type Value Description 1 C1 Ceramic Capacitor 10µF 35V, B, ±10% 1 C2 Ceramic Capacitor 22µF 4V, B, ±20% 0 C3 Ceramic Capacitor n/a 2 C4, C5 Ceramic Capacitor 1 C6 Ceramic Capacitor 1 1 L1 Inductor 0.1µF - Manufacturer Part Number - 16V, B, ±10% GRM188B11C104KA01 MURATA 1608 0.022μF 16V, B, ±10% GRM155B11C223KA01 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 10µH ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M TAIYO YUDEN 6060 TDK 7269 ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 WÜRTH 7373 ROHM 1005 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) 10kΩ 0.063W, 50V, 1% MCR01MZPF1002 Resistor 30kΩ 0.063W, 50V, 1% MCR01MZPF3002 ROHM 1005 Resistor 1.2kΩ 0.063W, 50V, 5% MCR01MZPJ122 ROHM 1005 IC - Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 R1 Resistor 1 R2 1 R3 1 U1 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. 3/6 15.May.2015 Rev.001 Application Note BD9328EFJ-LB ■ Bill of Materials (continued) 3. VO=1.5V (VIN =4.2V to 18V) Count Reference Designator Type Value Description Manufacturer Part Number Manufacturer Configuration (mm) 1 C1 Ceramic Capacitor 10µF 35V, B, ±10% GRM32EB3YA106KA12 MURATA 3225 1 C2 Ceramic Capacitor 22µF 6.3V, B, ±20% GRM319B30J226ME15 MURATA 3216 0 C3 Ceramic Capacitor n/a 2 C4, C5 Ceramic Capacitor 0.1µF 1 C6 Ceramic Capacitor 1 L1 Inductor - - 16V, B, ±10% 0.01μF 16V, B, ±10% 10µH - - GRM188B11C104KA01 MURATA 1608 GRM155B11C103KA01 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV TAIYO YUDEN 6060 ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TDK 7269 TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) WÜRTH 7373 1 R1 Resistor 10kΩ 0.063W, 50V, 1% MCR01MZPF1002 ROHM 1005 1 R2 Resistor 15kΩ 0.063W, 50V, 1% MCR01MZPF1502 ROHM 1005 1 R3 Resistor 2.2kΩ 1 U1 IC - 0.063W, 50V, 5% MCR01MZPJ222 ROHM 1005 Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 Manufacturer Configuration (mm) 4. VO=1.8V (VIN =4.2V to 18V) Count Reference Designator Type Value Description Manufacturer Part Number 1 C1 Ceramic Capacitor 10µF 35V, B, ±10% GRM32EB3YA106KA12 MURATA 3225 1 C2 Ceramic Capacitor 22µF 6.3V, B, ±20% GRM319B30J226ME15 MURATA 3216 0 C3 Ceramic Capacitor n/a 2 C4, C5 Ceramic Capacitor 0.1µF 1 C6 Ceramic Capacitor 1 L1 Inductor - - 16V, B, ±10% 6800pF 16V, B, ±10% 10µH - - GRM188B11C104KA01 MURATA 1608 GRM15XB11C682KA86 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV TAIYO YUDEN 6060 ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TDK 7269 TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) WÜRTH 7373 2 R1, R2 Resistor 10kΩ 0.063W, 50V, 1% MCR01MZPF1002 ROHM 1005 1 R3 Resistor 3.9kΩ 0.063W, 50V, 5% MCR01MZPJ392 ROHM 1005 1 U1 IC - Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. 4/6 15.May.2015 Rev.001 Application Note BD9328EFJ-LB ■ Bill of Materials (continued) 5. VO=3.3V (VIN =4.8V to 18V) Count Reference Designator Type Value Description 1 C1 Ceramic Capacitor 10µF 35V, B, ±10% 1 C2 Ceramic Capacitor 22µF 16V, B, ±20% 0 C3 Ceramic Capacitor n/a 2 C4, C5 Ceramic Capacitor 1 C6 Ceramic Capacitor 1 L1 Inductor 0.1µF - Manufacturer Part Number Manufacturer Configuration (mm) GRM32EB3YA106KA12 MURATA 3225 GRM32EB31C226ME16 MURATA 3225 - - - 16V, B, ±10% GRM188B11C104KA01 MURATA 1608 3300pF 16V, B, ±10% GRM15XB11C332KA86 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 10µH ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M TAIYO YUDEN 6060 TDK 7269 ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) WÜRTH 7373 1 R1 Resistor 20kΩ 0.063W, 50V, 1% MCR01MZPF2002 ROHM 1005 1 R2 Resistor 7.5kΩ 0.063W, 50V, 1% MCR01MZPF7501 ROHM 1005 1 R3 Resistor 7.5kΩ 0.063W, 50V, 5% MCR01MZPJ752 ROHM 1005 1 U1 IC - Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 Manufacturer Configuration (mm) GRM32EB3YA106KA12 MURATA 3225 GRM32EB31C226ME16 MURATA 3225 - - 6. VO=5.0V (VIN =7.2V to 18V) Count Reference Designator Type Value Description 1 C1 Ceramic Capacitor 10µF 35V, B, ±10% 1 C2 Ceramic Capacitor 22µF 16V, B, ±20% 0 C3 Ceramic Capacitor n/a 2 C4, C5 Ceramic Capacitor 1 C6 Ceramic Capacitor 1 L1 Inductor 0.1µF - Manufacturer Part Number - 16V, B, ±10% GRM188B11C104KA01 MURATA 1608 2200pF 25V, B, ±10% GRM155B11E222KA01 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 10µH ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M TAIYO YUDEN 6060 TDK 7269 ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 WÜRTH 7373 ROHM 1005 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) 1 R1 Resistor 8.2kΩ 0.063W, 50V, 1% MCR01MZPF8201 1 R2 Resistor 1.8kΩ 0.063W, 50V, 1% MCR01MZPF1800 ROHM 1005 1 R3 Resistor 11kΩ 0.063W, 50V, 5% MCR01MZPJ113 ROHM 1005 1 U1 IC - Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. 5/6 15.May.2015 Rev.001 Application Note BD9328EFJ-LB ■ Bill of Materials (continued) 7. VO=9.0V (V IN =12.9V to 18V) Count Reference Designator MURATA 3225 16V, B, ±10% GRM188B11C104KA01 MURATA 1608 2200pF 25V, B, ±10% GRM155B11E222KA01 MURATA 1005 ±20%, DCR=29.82mΩmax, 7.6A XAL6060-103ME Coilcraft 6466 ±20%, DCR=87.26mΩmax, 4.4A CDMC50D38T150NP-100MC Sumida 5450 TAIYO YUDEN 6060 TDK 7269 10µF 35V, B, ±10% 0.1µF 2 C4, C5 Ceramic Capacitor 1 C6 Ceramic Capacitor 1 GRM32EB3YA106KA12 Ceramic Capacitor C1, C2, C3 L1 Configuration (mm) Value 3 1 Manufacturer Type Inductor R1 Resistor 10µH Description Manufacturer Part Number ±20%, DCR=59.8mΩmax, 3.1A NRS6045T100MMGKV ±20%, DCR=45.6mΩmax, 2.7A CLF7045T-100M ±20%, DCR=53mΩmax, 2.9A B1047AS-100M (DS75LC) TOKO 7676 ±20%, DCR=71.2mΩmax, 3.5A IHLP2525CZER100M11 VISHAY 6965 WÜRTH 7373 ROHM 1005 ±20%, DCR=49mΩmax, 2.6A 74477710 (WE-PD 7345) 27kΩ 0.063W, 50V, 1% MCR01MZPF2702 1 R2 Resistor 3kΩ 0.063W, 50V, 1% MCR01MZPF3000 ROHM 1005 1 R3 Resistor 11kΩ 0.063W, 50V, 5% MCR01MZPJ113 ROHM 1005 1 U1 IC - Buck DC/DC Converter BD9328EFJ-LB ROHM HTSOP-J8 ■ Precautions for use (1) This document provides the BOM for evaluation boards. Small parts can also be selected for resistor, capacitor, and coil. (2) When miniaturizing a resistor, consider decrease in rated power and withstand voltage. (3) When miniaturizing a ceramic capacitor, consider decrease in withstand voltage. In addition, the capacity may be decreased by DC bias characteristics, and the desired characteristics may not be obtained. (4) If ceramic capacitor models differ even when they have the same capacity and withstand voltage, the capacity may be decreased by DC bias characteristics depending on the model, and desired characteristics may not be obtained. Be sure to check the DC bias characteristics. (5) When miniaturizing a coil, consider increase in direct current resistance and decrease in rated current. An increase in DC resistance can cause a deterioration of power conversion efficiency. A decrease in rated current can saturate the coil when outputting a large current, which may deteriorate efficiency or make it impossible to obtain the desired output current. (6) If there is a possibility that the output will short-circuit, use a coil with a rated current that is larger than the maximum IC output current. For example, even when up to 100 mA is actually used for an IC that can output 1 A, select a coil whose rated current is larger than 1 A. If a coil with a small rated current is used, it will be saturated by a large current in the event of output short-circuiting, resulting in a steep increase in output voltage. The IC may be broken down because the processing speed of the overcurrent protecting function of the IC cannot keep up with the increase in voltage. (7) This circuit constant is the value for our evaluation board. It may be necessary to adjust the constant for the actual board. Carry out suitable evaluations. www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. 6/6 15.May.2015 Rev.001 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 ensur 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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