BD9E300EFJ-LBE2 ROHM

Datasheet 7.0V to 36V Input, 2.5A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9E300EFJ-LB General Description Key Specifications This is the product guarantees long time support in Input Voltage Range: 7.0V to 36V Industrial market. Output Voltage Range: 1.0V to VIN0.7V Output Current: 2.5A (Max) BD9E300EFJ-LB is a synchronous buck switching regulator Switching Frequency: 1MHz (Typ) with built-in power MOSFETs. It is capable of an output High-Side MOSFET ON-Resistance: 170m (Typ) current of up to 2.5A. It has a high oscillation frequency of Low-Side MOSFET ON-Resistance: 140m (Typ) 1MHz while using small inductance value. It is a current Standby Current: 0A (Typ) mode control DC/DC converter and features high-speed transient response. Phase compensation can also be set Package W (Typ) x D (Typ) x H (Max) easily. HTSOP-J8 4.90mm x 6.00mm x 1.00mm Features Long Time Support Product for Industrial Applications. Synchronous single DC/DC converter. Over-Current Protection. Short Circuit Protection. Thermal Shutdown Protection. Undervoltage Lockout Protection. Soft Start. HTSOP-J8 package (Exposed Pad). Applications Industrial Equipment. HTSOP-J8 Power supply for FAs industrial device using 24V bass. Consumer applications such as home appliance. Distribution type power supply system for 12V, and 24V. Typical Application Circuit VIN 2 VIN BOOT 1 24V BD9E300EFJ-LB 10F 0.1 F VOUT SW 8 4.7 H Enable 3 EN 22 F2 COMP AGND PGND FB 6 4 7 5 12k 30k 3k 4700pF Figure 1. Application circuit Product structureSilicon monolithic integrated circuit. This product has no designed protection against radioactive rays. www .rohm.com TSZ02201-0J3J0AJ00220-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/30 14.May.2014 Rev.003 TSZ2211114 001 BD9E300EFJ-LB Pin Configuration (TOP VIEW) 1 8 SW BOOT VIN 2 7 PGND E-Pad 3 6 COMP EN AGND 4 5 FB Figure 2. Pin assignment Pin Description(s) Pin No Pin Name Description Connect a bootstrap capacitor of 0.1F between this terminal and SW terminal. 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 10F ceramic capacitor is recommended. Turning this terminal signal low-level (0.8V or lower) forces the device to enter the shut 3 EN down mode. Turning this terminal signal high-level (2.5V 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 on 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 23 on how to calculate the resistance and capacitance for phase compensation. 7 PGND Ground terminal 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 0.1F between this 8 SW terminal and BOOT terminal. In addition, connect an inductor considering the direct current superimposition characteristic. Exposed pad. Connecting this to the internal PCB ground plane using multiple vias - E-Pad provides excellent heat dissipation characteristics. www.rohm.co TSZ02201-0J3J0AJ00220-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/30 14.May.2014 Rev.003 TSZ22111 15 001