BD9S110NUX-CE2 ROHM

Datasheet 2.7 V to 5.5 V Input, 1 A Single Synchronous Buc k DC/DC Converter for Automotive BD9S11xNUX-C series General Description Key Specifications BD9S11xNUX-C series 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: MOSFETs. It is capable of providing current up to 1 A. BD9S110NUX-C 1.2 V(Typ) Small inductor is applicable due to high switching BD9S111NUX-C 1.8 V(Typ) frequency of 2.2 MHz. It is a current mode control Output Current: 1 A(Max) DC/DC Converter and features high-speed transient Switching Frequency: 2.2 MHz(Typ) response. It has an integrated feedback resistor that High Side FET ON Resistance: 270 m(Typ) sets the output voltage to 1.2 V/1.8 V and a built-in Low Side FET ON Resistance: 180 m(Typ) phase compensation circuit. Applications can be Shutdown Circuit Current: 0 A(Typ) created with a few external components. Operating Temperature: -40 C to +125 C Features Package W(Typ) x D(Typ) x H(Max) (Note 1) AEC-Q100 Qualified VSON008X2020 2.00 mm x 2.00 mm x 0.60 mm Single Synchronous Buck DC/DC Converter Adjustable Soft Start Function Output Discharge Function 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 Applications Automotive Equipment VSON008X2020 Other Electronic Equipment Typical Application Circuit V IN VIN PGD C IN1 V V EN OUT EN SW L 1 SS C OUT1 GND VOUT Figure 1. Application Circuit Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0J1J0AA01430-1-2 2018 ROHM Co., Ltd. All rights reserved. 1/31 TSZ22111 14 001 05.Sep.2018 Rev.001 BD9S11xNUX-C series Pin Configuration SW 1 8 GND SW 2 7 VIN EXP-PAD SS 3 6 EN VOUT 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 18 for how to calculate the capacitance.. 4 VOUT V feedback pin. Connect to output voltage sense point. OUT Power Good pin, an open drain output. It is need to be pulled up to the power supply with the 5 PGD resistor. See page 12 for setting the resistance. Pin for controlling the device. Turning this pin Low forces the device to enter the shutdown 6 EN mode. Turning this pin 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 TSZ02201-0J1J0AA01430-1-2 2018 ROHM Co., Ltd. All rights reserved. 2/31 05.Sep.2018 Rev.001 TSZ22111 15 001