Datasheet 16V to 60V, 1A 1ch 2.1MHz Synchronous Buck Converter Integrated F ET For Automotive BD9V100MUF-C General Description Key Specifications BD9V100MUF-C is a current mode synchronous buck Input Voltage Range: 16V to 60V converter integrating high voltage rating POWER Output Voltage Range: 0.8V to 5.5V MOSFETs. The wide range input 16V to 60V and very Output Current: 1A(Max) short minimum pulse width down to 20ns enables direct Operating Frequency: 1.9MHz to 2.3MHz conversion from 48V battery to 3.3V at 2.1MHz operation Reference Voltage Accuracy: TM by Nano Pulse Control . 2% (-40C to +125C) Shutdown Circuit Current: 0A(Typ) Features Operating Temperature Range: -40C to +125C TM Nano Pulse Control Enables Direct Conversion Package W(Typ) x D(Typ) x H(Max) 60V to 3.3V at 2.1MHz (Note 1) AEC-Q100 Qualified VQFN24FV4040 4.00mm x 4.00mm x 1.00mm SW Minimum ON Time 20ns(Max) Synchronous Switching Regulator Integrating POWER MOSFETs Soft Start Function Current Mode Control Over Current Protection Enlarged View Input Under Voltage Lock Out Protection Input Over Voltage Lock Out Protection Thermal Shutdown Protection Output Over Voltage Protection Short Circuit Protection Wettable Frank QFN Package (Note 1) Grade 1 VQFN24FV4040 Wettable Flank Package Applications Automotive Battery Powered Supplies 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 TSZ02201-0J1J0AL01310-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/39 TSZ22111 14 001 01.Jun.2017 Rev.001 BD9V100MUF-C 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 TSZ02201-0J1J0AL01310-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/39 TSZ22111 15 001 01.Jun.2017 Rev.001