BD9F800MUX-EVK-001

User’s Guide Switching Regulator Series 1ch Buck Converter with Integrated FET BD9F800MUX EVK BD9F800MUX-EVK-001 (12V to 1V, 8A) Introduction This user's guide describes the steps required to operate the EVK of BD9F800MUX. The document includes a description of the peripheral components, operating instructions, and reference data. Description BD9F800MUX-EVK-001 uses BD9F800MUX to output 1V from a 12V input voltage. The input voltage of the BD9F800MUX is from 4.5V to 28V and the output voltage is configurable from 0.765V to 13.5V with external resistors. The switching frequency can be selected as 300 kHz or 600 kHz. BD9F800MUX is a constant on-time controlled DC/DC converter with fast transient response and does not require external phase compensation circuit. It includes built-in soft start function for start-up rush current protection, Under Voltage Lock Out (UVLO), Thermal Shutdown Detection (TSD), Over Current Protection (OCP), and Short Circuit Protection (SCP). Application Step-down power supplies for DSPs, microprocessors, etc. Set-top box Liquid crystal TV DVD/Blu-ray player/recorder Amusement equipment © 2020 ROHM Co., Ltd. 1/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide EVK Operating Limits Parameter Input Voltage Min Typ Max Units 4.5 12.0 28.0 V Output Voltage 1.0 Conditions V Maximum Output Current 8.0 A Switching Frequency 300 kHz Maximum Efficiency 89 % Io = 2A UVLO Threshold Voltage 4.2 V VIN sweep up UVLO Hysteresis Voltage 400 mV EVK Overview Figure 1. BD9F800MUX-EVK-001(Top View) © 2020 ROHM Co., Ltd. Figure 2.BD9F800MUX-EVK-001(Bottom View) 2/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide EVK Schematic Figure 3. BD9F800MUX-EVK-001 Schematic Operating Procedure 1. Turn off the DC power supply and connect the GND terminal of the power supply to the PGND pin of TB1. 2. Connect the VCC terminal of the DC power supply to the VIN pin of EVK TB1. 3. Connect the load to the VOUT and GND pins of the EVK TB2. In the case of an electronic load, connect it with the load turned off. 4. Connect the VOUT terminal of the voltmeter to EVK's VOUT_S and the GND terminal to EVK's PGND_S. 5. Connect the J1 jumper to the VIN side. 6. Turn on the DC power. Make sure the voltmeter shows 1 V. 7. Turn on the electronic load. (Caution) This EVK does not support hot plug. Do not perform hot plug test. © 2020 ROHM Co., Ltd. 3/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide Operating State Settings Select the status of BD9F800MUX as shown in Table 1 according to the EN pin voltage. Table 1. EN Pin Setting EN Pin Voltage State HIGH (≥ 2.3 V) Enable LOW (≤ 0.7 V) Shutdown Switching Frequency Setting The switching frequency of BD9F800MUX is selected as shown in Table 2 by the FREQ pin. This EVK is equipped with optimum parts at 300 kHz. When changing the operating frequency, it is necessary to change the parts. Table 2．Switching Frequency Setting © 2020 ROHM Co., Ltd. FREQ Pin Voltage Switching Frequency HIGH (≥ 2.2 V) 600kHz LOW (≤ 0.8 V) 300kHz 4/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide Parts List Table 1. Parts List Count Parts No. Type Value 1 U1 IC - 1 L1 Inductor 2.2µH 0 C0 - 1 C1 1 C2 1 C3 1 C4 1 C5 0 C6 1 C7 1 C8 0 C9 0 0 Manufacturer Description Part Number Single Synchronous Manufacturer Configuration (mm) BD9F800MUX ROHM 11A max, ±20% CMLB104T2R2MS Cyntec - Open - - - 10μF 50V, X5R, ±20% GRM32ER61H106MA12 Murata 3225 10μF 50V, X5R, ±20% GRM32ER61H106MA12 Murata 3225 0.1μF 50V, X5R, ±10% GRM155R61H104KE14 Murata 1005 2.2μF 10V, X5R, ±10% GRM188R61A225KE34 Murata 1608 0.1μF 10V, X5R, ±10% GRM152R61A104KE19 Murata 1005 - Open - - - 47μF 6.3V, X5R, ±20% GRM31CR60J476ME19 Murata 3216 22μF 6.3V, X5R, ±20% GRM21BR60J226ME39 Murata 2012 - - Open - - - C10 - - Open - - - C11 - - Open - - - Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor Ceramic Capacitor BUCK Converter 3.5 x 3.5 L W : 0 C12 - - Open - - - 1 R1A Resistor 0Ω Jumper MCR01MZPJ000 ROHM 1005 1 R1B Resistor 6.8kΩ 50V, ±1%, 1/16W MCR01MZPF6801 ROHM 1005 1 R2 Resistor 22kΩ 50V, ±1%, 1/16W MCR01MZPF2202 ROHM 1005 1 R3 Resistor 100kΩ 50V, ±1%, 1/16W MCR01MZPF1003 ROHM 1005 0 R4 - - Open - - - 1 R5 Resistor 10kΩ 50V, ±1%, 1/16W MCR01MZPF1002 ROHM 1005 1 R6 Resistor 0Ω Jumper MCR01MZPJ000 ROHM 1005 1 R7 Resistor 0Ω Jumper MCR01MZPJ000 ROHM 1005 1 R8 Resistor 0Ω Jumper MCR01MZPJ000 ROHM 1005 0 R9 - - Open - - - © 2020 ROHM Co., Ltd. 5/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide EVK PCB Layout EVK PCB Information Number of Layers Material Board Size Copper Thickness 4 FR-4 85mm x 85mm x 1.6mmt 2oz (70μm) *Top, Bottom Layer 1oz (35μm) *Middle Layers Figure 4. Top Layer Layout Figure 5. Middle1 Layer Layout (Top View) (Top View) Figure 6. Middle2 Layer Layout Figure 7. Bottom Layer Layout (Top View) (Top View) © 2020 ROHM Co., Ltd. 6/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide Reference Application Curves 20 20 15 15 IIN [μA] IIN [mA] Ta = 25℃, VCC = 12V, EN = VCC, unless otherwise specified 10 5 10 5 0 0 0 5 10 15 20 25 30 0 5 10 VIN [V] 15 20 25 30 VIN [V] Figure 8. Current Consumption vs VIN Figure 9. Shutdown Current vs VIN (IO = 0mA) (EN=GND) 1.5 1.04 1.02 VOUT [V] VOUT [V] 1.0 0.5 1 0.98 0.96 0.0 0 5 10 15 20 25 0 30 2 4 6 8 IOUT [A] VIN [V] Figure 10. Line Regulation Figure 11. Load Regulation (IO = 0mA) © 2020 ROHM Co., Ltd. 7/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide Reference Application Curves – Cont’d 100 80 350 Efficiency [%] Frequency [kHz] 400 300 250 60 40 20 200 0 0 5 10 15 20 25 30 0 VIN [V] 2 4 6 8 10 IOUT [A] Figure 13. Efficiency vs Load Current Figure 12. Switching Frequency vs VIN (IO = 1A) VOUT: 0.05V/div (Offset = 1V) IOUT: 2A/div Figure 15. Frequency Response Figure 14. Load Response (IO = 8A) © 2020 ROHM Co., Ltd. 8/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide Reference Application Curves – Cont’d VIN: 10V/div VIN: 10V/div SW: 10V/div SW: 10V/div VOUT: 0.5V/div VOUT: 0.5V/div PGD: 5V/div PGD: 5V/div Figure 16. Start Up Waveform Figure 17. Shutdown Waveform (IO = 1A) (IO = 1A) © 2020 ROHM Co., Ltd. 9/10 No. 63UG048E Rev.001 2020.10 BD9F800MUX-EVK-001 User’s Guide Revision History Date Revision Description Number 2020.10. 2 © 2020 ROHM Co., Ltd. 001 Initial release 10/10 No. 63UG048E Rev.001 2020.10 Datasheet General Precaution 1. Before you use our Products, you are requested to carefully read this document and fully understand its contents. ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use of any ROHM’s Products against warning, caution or note contained in this document. 2. All information contained in this document is current as of the issuing date and subject to change without any prior notice. Before purchasing or using ROHM’s Products, please confirm the latest information with a ROHM sales representative. 3. The information contained in this document is provided on an “as is” basis and ROHM does not warrant that all information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccuracy or errors of or concerning such information. Notice – WE © 2015 ROHM Co., Ltd. All rights reserved. Rev.001