Distribution Spotlight Innovations Embedded Buck DC/DC Converters ROHM’s BD9328EFJ and BD9329AEFJ synchronous rectification step-down switching regulators integrate 2 low resistance N-channel MOSFETs and feature high current output over a wide input supply range. In addition, current-mode operation provides fast transient response along with easy phase compensation. An optimized design reduces the number of external components required, minimizing costs. Applications Key Features • Printers • LCD TVs • Home appliances • Distributed power systems • Secondary power supplies • BD/DVD players • DSL/cable modems • Set top boxes • Wide input voltage range: 4.2V -18V • High output current: 2A (BD9328EFJ) / 3A (BD9329AEFJ) • High Side/Low Side ON resistance: 0.15/0.13Ω • Supports low ESR ceramic capacitors • Low standby current: 15uA (typ.) • Operating frequency: 380kHz • Feedback voltage: 0.9V ± 1.5% accuracy at room temperature • Multiple protection circuits: UVLO, TSD, OCP • Thermally enhanced HTSOP-J8 package • Internal oscillator results in fewer external parts • Soft start function prevents inrush current at startup • Adjustable output voltage: 0.9V to Vin x 0.7V Pricing BD9328EFJ-E2: Min Quantity: 2500 LT:10 Price: $0.40 BD9329AEFJ-E2: Min Quantity: 2500 LT:10 Price: $0.46 Evaluation boards are available. 95 32 90 28 Efficiency[%] IOC (uA) 24 20 18 12 70 65 60 4 55 4 6 8 10 12 VN (V) 14 Stand by current (IC not active) BD9328EFJ-E2 80 75 8 0 more info: 85 16 1 50 0 500 1000 1500 2000 2500 3000 Io[mA] STEP Down Efficiency (VIN= 12V VOUT=3.3V L=10μH) visit us: BD9329AEFJ-E2 www.rohm.com