BD9E104FJ-E2 ROHM

Datasheet 7.0 V to 26.0 V Input, 1 A Integrated MOSFET Single Synchronous Bu ck DC/DC Converter BD9E104FJ General Description Key Specifications BD9E104FJ is a synchronous buck DC/DC converter with Input Voltage Range: 7.0 V to 26.0 V built-in low on-resistance power MOSFETs. High efficiency Output Voltage Range: 1.0 V to VIN x 0.5 V TM at light load with a SLLM (Simple Light Load Mode). It is Output Current: 1.0 A (Max) most suitable for use in the equipment to reduce the Switching Frequency: 570 kHz (Typ) standby power is required. It is a current mode control High Side MOSFET ON-Resistance:250 m (Typ) DC/DC converter and features high-speed transient Low Side MOSFET ON-Resistance: 200 m (Typ) response. Phase compensation can also be set easily. Shutdown Current: 0 A (Typ) Features Package W(Typ) x D(Typ) x H(Max) TM SLLM Control (Simple Light Load Mode) SOP-J8 4.90mm x 6.00mm x 1.65mm Single Synchronous Buck DC/DC converter Over Current Protection Short Circuit Protection Thermal Shutdown Protection Under Voltage Lockout Protection Internal Soft Start Reduce External Diode SOP-J8 Package Applications Consumer Applications such as Home Appliance Secondary Power Supply and Adapter Equipment Telecommunication Devices SOP-J8 Typical Application Circuit V IN 2 VIN BOOT 1 12V BD9E104FJ V OUT SW 8 Enable 3 EN COMP AGND PGND FB 6 4 7 5 Figure 1. Application Circuit TM SLLM is a trademark of ROHM Co., Ltd. Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0F3F0AJ00170-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/30 TSZ22111 14 001 11.Dec.2017 Rev.001 BD9E104FJ Pin Configuration (TOP VIEW) BOOT 1 8 SW 8 VIN PGND 2 7 3 6 COMP EN AGND 4 5 FB Figure 2. Pin Configuration Pin Descriptions Pin No. Pin Name Description Connect a bootstrap capacitor of 0.1 F between this pin and the SW pin. 1 BOOT The voltage of this capacitor is the gate drive voltage of the High Side MOSFET. Power supply pin for the switching regulator and control circuit. 2 VIN Connecting a 10 F ceramic capacitor is recommended. Turning this pin signal low-level (0.8 V or lower), the device is forced to be in the shutdown 3 EN mode. Turning this pin signal high-level (2.5 V or higher) enables the device. This pin must be terminated. 4 AGND Ground pin for the control circuit. Inverting input node for the gm error amplifier. 5 FB See page 21 for how to calculate the resistance of the output voltage setting. Input pin for the gm error amplifier output and the output for the PWM comparator. 6 COMP Connect phase compensation components to this pin. See page 22 for how to calculate the resistance and capacitance for phase compensation. 7 PGND Ground pin for the output stage of the switching regulator. Switch pin. This pin 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 this pin and the 8 SW BOOT pin. In addition, connect an inductor considering the direct current superimposition characteristic. www.rohm.com TSZ02201-0F3F0AJ00170-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/30 TSZ22111 15 001 11.Dec.2017 Rev.001