BD9S300MUF-CE2

Datasheet 2.7V to 5.5V Input, 3A Integrated MOSFET Single Synchronous Bu ck DC/DC Converter For Automotive BD9S300MUF-C General Description Key Specifications BD9S300MUF-C is a synchronous buck DC/DC Input Voltage: 2.7V to 5.5V Converter with built-in low On Resistance power Output Voltage Setting: 0.8V to V x 0.8V PVIN MOSFETs. It is capable of providing current up to 3A. Output Current: 3A(Max) TM The SLLM control provides excellent efficiency Switching Frequency: 2.2MHz(Typ) characteristics in light-load conditions which make the High Side MOSFET ON Resistance: 35m (Typ) product ideal for reducing standby power consumption of Low Side MOSFET ON Resistance: 35m (Typ) equipment. Small inductor is applicable due to high Shutdown Circuit Current: 0A (Typ) switching frequency of 2.2MHz. It is a current mode Operating Temperature: -40C to +125C 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. VQFN16FV3030 3.00mm x 3.00mm x 1.00mm It can also be synchronized to external pulse. Features TM SLLM (Simple Light Load Mode) Control (Note 1) AEC-Q100 Qualified Single Synchronous Buck DC/DC Converter Enlarged View Adjustable Soft Start Function Power Good Output Input Under Voltage Lockout Protection Short Circuit Protection Output Over Voltage Protection Over Current Protection VQFN16FV3030 Thermal Shutdown Protection Wettable Flank Package Wettable Flank QFN Package (Note 1) Grade 1 Applications Automotive Equipment (Cluster Panel, Infotainment Systems) Other Electronic Equipment Typical Application Circuit V IN PVIN PGD AVIN BOOT V MODE/SYNC C 1 C C MODE/SYNC IN1 IN2 V V OUT EN EN SW L 1 SS C ITH OUT R 1 PGND R 3 FB AGND R 2 C 3 C 2 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 TSZ02201-0J1J0AL01360-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/42 TSZ22111 14 001 27.Nov.2017 Rev.001 BD9S300MUF-C Pin Configuration 16 15 14 13 PVIN 1 12 SW PVIN 2 11 SW EXP-PAD PGND 3 10 SW PGND 4 9 SS 5 6 7 8 (TOP VIEW) Figure 2. Pin Configuration Pin Descriptions Pin No. Pin Name Function Power supply pins for the DC/DC Converter. 1, 2 PVIN Connecting a 10F ceramic capacitor is recommended. 3, 4 PGND Ground pins for the DC/DC Converter. 5 AGND Ground pin. VOUT voltage feedback pin. An inverting input node for the gm error amplifier. Connect output 6 FB voltage divider to this pin to set the output voltage. See page 17 on how to compute for the resistor values. An output pin of the gm error amplifier and the input of PWM comparator. 7 ITH Connect phase compensation components to this pin. See page 20 on calculate the resistance and capacitance of phase compensation. TM Pin for selecting the SLLM control mode and the Forced PWM mode. Turning this pin signal Low forces the device to operate in the Forced PWM mode. Turning this pin signal High enables MODE TM TM 8 the SLLM control and the mode is automatically switched between the SLLM control and /SYNC PWM mode according to the load current. In addition, external synchronization operation is started by inputting synchronous pulse signal to this pin. Pin for setting the soft start time. The rise time of the output voltage can be specified by 9 SS connecting a capacitor to this pin. See page 19 on calculate the capacitance. Switch pin. These pins are connected to the source of the High Side MOSFET and drain of the 10, 11, 12 SW Low Side MOSFET. Connect a bootstrap capacitor of 0.1F between these pins and the BOOT pin. Connect a bootstrap capacitor of 0.1F between this pin and the SW pins. 13 BOOT The voltage of this capacitor is the gate drive voltage of the High Side MOSFET. Power Good pin, an open drain output. Use of pull up resistor is needed. See page 12 on setting 14 PGD the resistance. Pin for controlling the device. Turning this pin signal Low forces the device to enter the shutdown 15 EN mode. Turning this pin signal High enables the device. Power supply input pin of the analog circuitry. Connect this pin to PVIN. Connecting a 0.1F 16 AVIN ceramic capacitor is recommended. A backside heat dissipation pad. Connecting to the internal PCB ground plane by using via - EXP-PAD provides excellent heat dissipation characteristics. www.rohm.com TSZ02201-0J1J0AL01360-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/42 TSZ22111 15 001 27.Nov.2017 Rev.001 AGND AVIN FB EN ITH PGD MODE BOOT /SYNC