BD9S100NUX-CE2 ROHM

Datasheet 2.7 V to 5.5 V Input, 1 A Single Synchronous Bu ck DC/DC Converter for Automotive BD9S100NUX-C General Description Key Specifications BD9S100NUX-C is a synchronous buck DC/DC Input Voltage: 2.7 V to 5.5 V Converter with built-in low On Resistance power Output Voltage Setting: 0.8 V to V IN MOSFETs. It is capable of providing current up to 1 A. Output Current: 1 A(Max) Small inductor is applicable due to high switching Switching Frequency: 2.2 MHz(Typ) frequency of 2.2 MHz. It is a current mode control High Side FET ON Resistance: 270 m(Typ) DC/DC Converter and features high-speed transient Low Side FET ON Resistance: 180 m(Typ) response. It has a built-in phase compensation circuit. Shutdown Circuit Current: 0 A(Typ) Applications can be created with a few external Operating Temperature: -40 C to +125 C components. Package W(Typ) x D(Typ) x H(Max) Features VSON008X2020 2.00 mm x 2.00 mm x 0.60 mm (Note 1) AEC-Q100 Qualified Single Synchronous Buck DC/DC Converter Adjustable Soft Start Function Output Discharge Function 100 % ON Duty Cycle Power Good Output Input Under Voltage Lockout Protection (UVLO) Short Circuit Protection (SCP) Output Over Voltage Protection (OVP) Over Current Protection (OCP) Thermal Shutdown Protection (TSD) (Note 1) Grade 1 VSON008X2020 Applications Automotive Equipment Other Electronic Equipment Typical Application Circuit V IN VIN PGD C IN1 V V EN OUT EN SW L 1 SS C OUT1 R 1 GND FB R 2 Figure 1. Application Circuit Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0J2J0AA01410-1-2 2018 ROHM Co., Ltd. All rights reserved. 1/36 08.May.2018 Rev.001 TSZ22111 14 001 BD9S100NUX-C Pin Configuration SW 1 8 GND SW 2 7 VIN EXP-PAD SS 3 6 EN FB 4 5 PGD (TOP VIEW) Pin Descriptions Pin No. Pin Name Function 1, 2 SW Switch pin. These pins are connected to the drain of the High Side FET and the Low Side FET. Pin for setting the soft start time. The rise time of the output voltage can be specified by 3 SS connecting a capacitor to this pin. See page 17 on calculate the capacitance. V feedback pin. An inverting input node for the error amplifier. Connect output voltage divider OUT 4 FB to this pin to set the output voltage. See page 15 on how to compute for the resistor values. Power Good pin, an open drain output. Use of pull up resistor is needed. See page 11 on setting 5 PGD the resistance. Pin for controlling the device. Turning this pin signal Low forces the device to enter the 6 EN shutdown mode. Turning this pin signal High makes the device to start up. Power supply pin. Connecting a 10 F(Typ) ceramic capacitor is recommended. The detail of a 7 VIN selection is described in page 16. 8 GND Ground pin. 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 TSZ02201-0J2J0AA01410-1-2 2018 ROHM Co., Ltd. All rights reserved. 2/36 TSZ22111 15 001 08.May.2018 Rev.001