BD9D300MUV-E2 ROHM

Datasheet 4.0 V to 17 V Input, 3 A Integrated MOSFET Single Synchronous Buc k DC/DC Converter BD9D300MUV General Description Key Specifications BD9D300MUV is a synchronous buck switching regulator Input Voltage Range: 4 V to 17 V with built-in low on-resistance power MOSFETs. This Output Voltage Range: 0.9 V to 5.25 V integrated circuit (IC) is capable of providing current up to Output Current: 3 A (Max) 3 A. It operates high oscillating frequency with low Switching Frequency: 1.25 MHz (Typ) inductance. It has original on-time control system which High-Side FET ON Resistance: 110 m (Typ) can operate low power consumption in light load condition. Low-Side FET ON Resistance: 50 m (Typ) This IC is ideal for reducing standby power consumption Shutdown Current: 3 A (Typ) of equipment. Operating Quiescent Current: 20 A (Typ) Features Package W (Typ) x D (Typ) x H (Max) Single Synchronous Buck DC/DC Converter VQFN016V3030 3.00 mm x 3.00 mm x 1.00 mm On-time Control Light Load Mode Control Over Current Protection (OCP) Short Circuit Protection (SCP) Thermal Shutdown Protection (TSD) Under Voltage Lockout Protection (UVLO) Adjustable Soft Start Power Good Output Over Voltage Protection (OVP) VQFN016V3030 Package Backside Heat Dissipation Applications Step-down Power Supply for SoC, FPGA, VQFN016V3030 Microprocessor Laptop PC / Tablet PC / Server LCD TV Storage Device (HDD / SSD) 2-series Cell Li-Ion Batteries Equipment Printer, OA Equipment Distributed Power Supply, Secondary Power Supply Typical Application Circuit V IN BD9D300MUV PVIN PGD V PGD C AVIN IN R 3 V EN EN L 1 RESERVE SW V OUT C OUT MODE VOUTS R 1 SS FB PGND R 2 AGND Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays. www.rohm.com TSZ02201-0F3F0AJ00260-1-2 2019 ROHM Co., Ltd. All rights reserved. 1/39 TSZ22111 14 001 18.Mar.2019 Rev.001 BD9D300MUV Pin Configuration (TOP VIEW) 16 15 14 13 1 12 SW PVIN SW 2 11 PVIN EXP-PAD SW 3 10 AVIN PGD 4 9 SS 5 6 7 8 Pin Descriptions Pin No. Pin Name Function Switch pin. These pins are connected to the drain of the High-Side and Low-Side FET. In 1, 2, 3 SW addition, connect an inductor considering the direct current superimposition characteristic. Power Good pin. This pin is an open drain output that requires a pull-up resistor (to the VOUTS 4 PGD pin). See page 15 for setting the resistance. If not used, this pin can be left floating or connected to Ground. Output voltage feedback pin. See page 32 for how to calculate the resistances of the output 5 FB voltage setting. 6 AGND Ground pin for the control circuit. 7 RESERVE Reserve pin. Connect to Ground. Pin for setting switching control mode. Connecting this pin to the VOUTS pin forces the device to operate in the Pulse Width Modulation (PWM) mode control. Connecting to Ground, the 8 MODE mode is automatically switched between the Light Load mode control and PWM mode control. Fix this pin to the VOUTS pin or Ground. Do not change the mode control during operation. Pin for setting the soft start time of output voltage. The soft start time is 1 ms (Typ) when the 9 SS SS pin is open. A ceramic capacitor connected to the SS pin makes the soft start time 1 ms or more. See page 32 for how to calculate the capacitance. Pin for supplying power to the control circuit. Connecting 0.1 F (Typ) ceramic capacitor is 10 AVIN recommended. This pin is connected to PVIN. Power supply pins for the output MOSFETs. Connecting 10 F (Typ) ceramic capacitor is 11, 12 PVIN recommended. Enable pin. The device starts up when V is set to 0.9 V (Min) or more. The device enters the EN 13 EN shutdown mode with setting V to 0.3 V (Max) or less. This pin must be properly terminated. EN 14 VOUTS Pin for discharging output and detecting output voltage. Connect to output voltage node. 15, 16 PGND Ground pins for the output stage of the switching regulator. 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 TSZ02201-0F3F0AJ00260-1-2 2019 ROHM Co., Ltd. All rights reserved. 2/39 TSZ22111 15 001 18.Mar.2019 Rev.001 FB PGND AGND PGND RESERVE VOUTS MODE EN