BD9C301FJ-E2 ROHM

Datasheet 4.5V to 18V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD9C301FJ General Description Key Specifications BD9C301FJ is a synchronous buck switching regulator Input Voltage Range: 4.5V to 18.0V with built-in low on-resistance power MOSFETs. With Reference Voltage: 0.8V 1% wide input voltage range, it is capable of providing current Maximum Output Current: 3A(Max) of up to 3 A. It is a current mode control DC/DC converter Switching Frequency: 500kHz(Typ) and features high-speed transient response. Pch MOSFET On Resistance: 65m(Typ) Phase compensation can also be set easily. Nch MOSFET On Resistance: 35m(Typ) Standby Current: 1A (Typ) Operating Temperature Range: -40C to +85C Features Package W(Typ) x D(Typ) x H(Max) Synchronous Single DC/DC Converter SOP-J8 4.90mm x 6.00mm x 1.65mm Over Current Protection Thermal Shutdown Protection Under Voltage Lockout Protection Short Circuit Protection Fixed Soft Start Function Applications LCD TVs Set-top Boxes DVD/Blu-ray Disc Players/Recorders Broadband Network and Communication Interface Entertainment Devices SOP-J8 Typical Application Circuit VIN VIN 12V VOUT 4.7H 3.3V 10F 0.1F SW Enable EN 22F2 COMP AGND PGND FB Figure 1. Application Circuit Product structure: silicon monolithic integrated circuit This product has no protection against radioactive rays www.rohm.com TSZ02201-0J2J0AJ00430-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/20 TSZ22111 14 001 24.JUL.2018 Rev.004 BD9C301FJ Pin Configuration (TOP VIEW) 1 8 SW PGND VIN SW 2 7 3 6 EN AGND FB 4 5 COMP Figure 2. Pin Assignment Pin Descriptions Pin No. Pin Name Function 1 PGND Ground pins for the output stage of the switching regulator. This pins supply power to the control circuit and the output stage of the switching regulator. 2 VIN Connecting a 10 F and a 0.1F ceramic capacitor is recommended. 3 AGND Ground pin for the control circuit. An inverting input node for the gm error amplifier. 4 FB See page 14 for how to calculate the resistance of the output voltage setting. An input pin for the switch current comparator and an output pin for the gm error amplifier. Connect a 5 COMP frequency phase compensation component to this pin. See page 14 for how to calculate the resistance and capacitance for phase compensation. Turning this pin signal low (0.8 V or lower) forces the device to enter the shutdown mode. Turning this 6 EN pin signal high (2.0 V or higher) enables the device. This pin must be terminated. 7 SW Switch nodes. These pins are connected to the drain of Pch MOSFET and the drain of Nch MOSFET. 8 www.rohm.com TSZ02201-0J2J0AJ00430-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/20 24.JUL.2018 Rev.004 TSZ22111 15 001