BD9E102FJ-EVK-001 ROHM

7.0V to 26V Input, 1.0A, Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E102FJ General Description Key Specifications The BD9E102FJ is a synchronous buck switching Input voltage range: 7.0V to 26V regulator with low on-resistance built-in power MOSFETs. Adjustable output voltage range: 1.0V to VIN x 0.7V TM High efficiency at light load with a SLLM . It is most Maximum output current: 1.0 A (Max.) suitable for use in the equipment to reduce the standby Switching frequency: 570 kHz (Typ.) power is required. It is a current mode control DC/DC High-Side MOSFET on-resistance: 250 m (Typ.) converter and features high-speed transient response. Low-Side MOSFET on-resistance: 200 m (Typ.) Phase compensation can also be set easily. Shutdown current: 0 A (Typ.) Features Package W (Typ.) x D (Typ.) x H (Max.) Synchronous single DC/DC converter SOP-J8 4.90 mm x 6.00 mm x 1.65 mm TM SLLM control (Simple Light Load Mode) Efficiency = 80% ( IOUT=10mA) Over current protection Short circuit protection Thermal shutdown protection Undervoltage lockout protection Soft start Reduce external diode SOP-J8 package Applications Consumer applications such as home appliance Secondary power supply and Adapter equipments Telecommunication devices SOP-J8 Typical Application Circuit Figure 1. Application circuit Product structureSilicon monolithic integrated circuit. This product is not designed for protection against radioactive rays. www .rohm.com TSZ02201-0J3J0AJ00500-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/29 TSZ2211114001 1.MAY.2013 Rev.001DatasheetDatasheet BD9E102FJ Pin Configuration (TOP VIEW) 1 8 SW BOOT VIN PGND 2 7 3 6 COMP EN AGND 4 5 FB Figure 2. Pin assignment Pin Descriptions Pin No. Pin Name Description Connect a bootstrap capacitor of 0.1 F between this terminal and SW terminals. 1 BOOT The voltage of this capacitor is the gate drive voltage of the high-side MOSFET. Power supply terminal for the switching regulator and control circuit. 2 VIN Connecting a 10 F ceramic capacitor is recommended. Turning this terminal signal low-level (0.8 V or lower) forces the device to enter the shut 3 EN down mode. Turning this terminal signal high-level (2.0 V or higher) enables the device. This terminal must be terminated. 4 AGND Ground terminal for the control circuit. Inverting input node for the gm error amplifier. 5 FB See page 22 for how to calculate the resistance of the output voltage setting. Input terminal for the gm error amplifier output and the output switch current comparator. Connect a frequency phase compensation component to this terminal. 6 COMP See page 22 for how to calculate the resistance and capacitance for phase compensation. 7 PGND Ground terminals for the output stage of the switching regulator. Switch node. This terminal is connected to the source of the high-side MOSFET and drain of the low-side MOSFET. Connect a bootstrap capacitor of 0.1 F between these 8 SW terminals and BOOT terminals. In addition, connect an inductor of 6.8 H with attention paid to theconsidering the direct current superimposition characteristic. www .rohm.com TSZ02201-0J3J0AJ00500-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/29 TSZ2211115001 1.MAY.2013 Rev.001