Datasheet 16V to 60V, 1A 1ch 2.1MHz Synchronous Buck Co nverter Integrated FET BD9V101MUF-LB General Description Key Specifications This is the product guarantees long time support in Input Voltage Range: 16V to 60V Industrial market. Output Voltage Range: 0.8V to 5.5V Output Current: 1A(Max) BD9V101MUF-LB is a current mode synchronous buck Operating Frequency: 1.9MHz to 2.3MHz converter integrating high voltage rating POWER Reference Voltage Accuracy: MOSFETs. The wide range input 16V to 60V and very 2% short minimum pulse width down to 20ns enables direct Shutdown Circuit Current: 0A(Typ) conversion from 60V power supply to 3.3V at 2.1MHz Operating Junction Temperature Range: TM operation by Nano Pulse Control . -40C to +150C Features Package W(Typ) x D(Typ) x H(Max) TM Nano Pulse Control Enables Direct Conversion VQFN24FV4040 4.00mm x 4.00mm x 1.00mm 60V to 3.3V at 2.1MHz Long Time Support Product for Industrial Applications. SW Minimum ON Time 20ns(Max) Synchronous Switching Regulator Integrating POWER MOSFETs Enlarged View Soft Start Function Current Mode Control Over Current Protection Input Under Voltage Lock Out Protection Input Over Voltage Lock Out Protection Thermal Shutdown Protection VQFN24FV4040 Output Over Voltage Protection Wettable Flank Package Short Circuit Protection Wettable Flank QFN Package Applications Industrial Equipment Consumer Supplies Typical Application Circuit Figure 1. Application Circuit TM Nano Pulse Control 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 TSZ02201-0J1J0AJ01330-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/39 TSZ22111 14 001 15.Sept.2017 Rev.001 BD9V101MUF-LB Pin Configuration (TOP VIEW) Figure 2. Figure of Terminal Placement Pin Description Pin No. Pin Name Function Enable pin. Apply Low-level (0.8V or lower) to turn this device off. 1 EN Apply High-level (2.5V or higher) to turn this device on. Power supply input pin of the internal circuitry. 2 VIN Connect this pin to PVIN. Power supply input pins that are used for the output stage of the switching regulator. 3 to 6 PVIN Connecting input ceramic capacitors with values of 2.2F and 0.1F to this pin is recommended. 7 to 10 PGND Power GND input pins. 11,12 N.C. No connection pins. Leave these pins open, or connect PGND pin. Switching node pins. These pins are connected to the source of the internal the Top POWER MOSFET and the drain of the internal Bottom side POWER MOSFET. 13,14 SW Connect the power inductor and the bootstrap capacitor 0.022F and resistor 3.3 to these pins. Power supply pin of the internal the Top POWER MOSFET. Connect a 3.3 resistor to this pin in series with a 0.022F bootstrap capacitor connected to SW pin. 15 BST This capacitors voltage becomes the power supply of the Top POWER MOSFET gate driver. 16 N.C. No connection pin. Leave this pin open. Internal power supply output pin. This node supplies power 5V(Typ) to other blocks 17 VREGH which are mainly responsible for the control function of the switching regulator. Connect a ceramic capacitor with value of 2.2F to ground. Power Good pin. This pin is in open drain configuration so pull-up resistor is needed to 18 PGOOD turn it HIGH or LOW. This pin is used for setting the switching frequency. Connect a frequency setting 19 RT resistor between this pin and GND pin. Output of the gm error amplifier, and the input of PWM comparator. Connect phase 20 COMP compensation components to this pin. See page 23 on calculate the resistance and capacitance of phase compensation. 21 GND Ground pin. VOUT voltage feedback pin. Inverting input node for the gm error amplifier. Connect 22 FB output voltage divider to this pin to set the output voltage. See page 22 on how to compute for the resistor values. Short Circuit Protection threshold detect pin. This node is monitoring the output voltage 23 VMON and discharging it during shutdown. 24 N.C. No connection pin. Leave this pin open. Exposed pad. Connect this pad to the internal PCB ground plane using multiple via - E-PAD holes to obtain excellent heat dissipation characteristics. w ww.rohm.com TSZ02201-0J1J0AJ01330-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/39 TSZ22111 15 001 15.Sept.2017 Rev.001