BD9329AEFJ-E2 ROHM

Datasheet 4.2V to 18V, 3A 1ch Synchronous Buck Conv erter with Integrated FET BD9329AEFJ General Description Key Specifications The BD9329AEFJ is a synchronous step-down Input Voltage Range: 4.2V to 18V switching regulator with built-in two low-resistance Output Voltage Range: 0.9V to (V x 0.7)V IN N-Channel MOSFETs. This IC can supply continuous Output Current: 3.0A (Max) output current of 3A over a wide input range, and Switching Frequency 380kHz(Typ) provides not only fast transient response, but also easy Hi-Side FET ON-Resistance: 0.15(Typ) phase compensation because of current mode control. Lo-Side FET ON-Resistance: 0.13(Typ) Standby Current: 15A (Typ) Features Operating Temperature Range: -40C to +85C Uses Low ESR Output Ceramic Capacitors Low Standby Current Package W(Typ) D(Typ) H(Max) 380 kHz Fixed Operating Frequency Feedback Voltage 0.9V 1.5%(Ta=25C) 0.9V 2.0%(Ta=-25C to +85C) Under Voltage Protection Thermal Shutdown Over Current Protection Applications Distributed Power Systems Pre-Regulator for Linear Regulators HTSOP-J8 4.90mm x 6.00mm x 1.00mm Typical Application Circuit C PC 3300pF R PC R DW 7.5k 10k C SS 0.1F R UP 27k Thermal Pad (to be shorted to GND) L V = 12V IN V = 3.3V OUT 10H C CO1 C VC1 10F 20F R BS protects from VIN-BST short destruction. Figure 1. Typical Application Circuit Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0323AAJ00010-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/19 TSZ2211114001 16.Feb.2015 Rev.003 BST SS R BS 22 VIN EN C BS 0.1F SW COMP GND FB BD9329AEFJ Pin Configuration Block Diagram (TOP VIEW) V IN SS EN COMP FB VIN BST VIN SW GND Figure 2. Pin Configuration Figure 3. Block Diagram Pin Description Pin No. Pin Name Function 1 BST High-side gate drive boost input 2 VIN Power input 3 SW Power switching output 4 GND Ground 5 FB Feedback input 6 COMP Compensation node 7 EN Enable input 8 SS Soft start control input www.rohm.com TSZ02201-0323AAJ00010-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/19 TSZ2211115001 16.Feb.2015 Rev.003