BD9A600MUV-EVK-001 ROHM

Switching Regulator Series Step-Down DC/DC Converter BD9A600MUV Evaluation Board BD9A600MUV-EVK-001 Description This evaluation board has been developed for ROHMs synchronous buck DC/DC converter customers evaluating BD9A600MUV. While accepting a power supply of 2.7-5.5V, an output of 1.8V can be produced. The IC has internal 25m high-side N-channel MOSFET and 25m low-side N-channel MOSFET and a synchronization frequency is of 1MHz. A Soft Start circuit prevents in-rush current during startup. An EN pin allows for simple ON/OFF control of the IC to reduce standby current consumption. A MODE pin allows the user to select fixed frequency PWM mode or enables the Deep-SLLM control and the mode is automatically switched between the Deep-SLLM control and fixed frequency PWM mode. Include OCP (Over Current Protection) and SCP (Short Circuit Protection). Evaluation Board Operating Limits and Absolute Maximum Ratings (Ta=25) Limit Parameter Symbol Unit Conditions MIN TYP MAX Supply Voltage V 2.7 - 5.5 V CC V - 1.8 - V OUT Output Voltage / Current I - - 6 A OUT Evaluation Board Figure 1. BD9A600MUV-EVK-001 Evaluation Board www .rohm.co.jp 28 November 2014 Rev.001 2014 ROHM Co., Ltd. All rights reserved. 1/9 BDD9A600MUUV-EVK-0001 Opperation Proocedures 1. NNecessary equipments (1) DC power-supply of 2.77V to 5.5V/6A (2) Maximumm 6A load (3) DC voltmeeter 2. CConnecting thhe equipmentss (1) DC power-supply preseets to 5.0V and then the powwer output turns off. (2) The max. load should bbe set at 6A annd over it will bbe disabled. (3) Check Jumper pin of SW1 is short, bbetween intermmediate-terminnal and OFF-sside terminal. (4) Connect ppositive-terminnal of power-ssupply to VIN++terminal and negative-termminal to GND-teerminal with aa pair of wires.. (5) Connect lloads positivee-terminal to VVOUT+terminaal and negativee-terminal to GGND-terminal with a pair of wires. (6) Connect ppositive-terminnal of DC voltmmeter 1 to TP1 and negative-terminal to TTP2 for input-vvoltage measuurement. (7) Connect ppositive-terminnal of DC voltmmeter 2 to TP33 and negative-terminal to TTP4 for outputt-voltage measurement. (8) DC power-supply outpuut is turned ONN. (9) IC is enabble (EN) by shhorting Jumper-pin of SW1 bbetween intermmediate-terminal and ON-siide terminal. (10) Check DDC voltmeter 22 displays 1.8VV. (11) The loadd is enabled. (12) Check aat DC voltmeteer 1 whether thhe voltage-droop (loss) is nott caused by thhe wires resisttance. + V DC Voltmeteer 2 + V DDC Voltmeter 11 - - + + DC Poweer Load - - Figure 22. Connection Diagram Ennable-Pin To minimizee current conssumption durinng standby-moode and normmal operation, Enable-mode can be switchhed by controllling EN pin(15pinn) of the IC. Standby-modde is enabledd by shorting Jumper-pin oof SW1 betweeen intermediate-terminal and OFF-side terminal and norrmal-mode opeeration by shoorting betweenn intermediate-terminal and ON-side termminal. It also can be swithed bbetween standdby-mode andd normal-modde operation bby removing JJumper-pin annd controlling the voltage betwween EN and GGND-terminal.. Standby-modde is enabled when the voltage of EN is under 0.5V, aand normal-mode operation whhen it is over 22.0V. wwww.rohm.co.jp 28 November 2014 Rev.0001 22014 ROHM Coo., Ltd. All rights reserved. 2/9