Featured Products High-Speed Load Response Buck DC/DC Converters BD958x1 Series ROHM’s 12V-compatible DC/DC converters integrate a power MOSFET and provides high-speed load response via H3RegTM technology The BD958x1 series includes pin-compatible models from 2A to 6A, making it possible to select the ideal product based on system specifications. In addition, fixed On Time control enables high-speed load response, eliminating the need for phase compensation. High-Speed Load Response Space-saving 3x3mm form factor Greater than 90% VQFN016V3030 High-speed load response via H3RegTMcontrol Lineup Input Voltage (V) Output Current (A) BD95821MUV 2.0 (Max.) BD95831MUV 3.0 (Max.) BD95841MUV DEGITAL CATV Compact Size High Power Conversion Efficiency Proprietary H3RegTM technology Part No. 電源 7.5 to 15.0 BD95861MUV 4.0 (Max.) Package VQFN016V3030 6.0 (Max.) H3RegTM Control The BD958x1 series utilizes ROHM’s proprietary H3RegTM control method for stable output voltage. With H3RegTM, the ON time of the high side FET is controlled when the voltage drops due to sudden load changes, speeding up output voltage recovery and improving transient characteristics. 6A Output Current 0A BD958x1 Improved Output Voltage Conventional Improved Chipset operating voltage range High-speed load response Time Features and Specifications Input Voltage Range : 7.5V to 15V Output Voltage Range : 0.8V to 5.5V Reference Voltage : 0.8V±1.5% Switching Frequency : 500kHz to 800kHz MOSFET ON Resistance : 85mΩ, 55mΩ(Typ.) Operating Temp. Range : -20°C to +100°C No phase compensation needed Synchronous rectification eliminates the need for an external diode ■ Multiple protection circuits • Over Current Protection (OCP) • Short Circuit Protection (SCP) • Thermal Shut Down (TSD) • Under Voltage Lock Out (UVLO) • Over Voltage Protection (OVP) ■ Soft Start function ■ Power Good output Power Efficiency Characteristics (BD95831MUV) VOUT = 3.3V 100 VOUT = 5.0V 90 80 Efficiency (%) ■ ■ ■ ■ ■ ■ ■ ■ Power conversion efficiency 70 60 VOUT = 1.2V Greater than 50 40 90% Condition VIN=12V L=3.3µH 30 20 10 0 0 1 Iout (A) 2 3 Applications ■ LCD TVs ■ Set top boxes ■ Gaming equipment ■ DVD / Blu-ray players and recorders ■ Secondary / POL power supplies Application Circuit VREG PGOOD R1 EN 100kΩ R4 R3 12 GND GND GND C6 VREG_C VREG EN 10 9 13 8 BOOT 14 7 SW 0.022µF TEST 11 PGOOD VOUT 680Ω 24kΩ FB 4.7kΩ R2 Thermal Pad (Shorted to GND) 15 6 C5 BOOT_C 0.01µF SW GND PGND 10µF 2 L1 SW 3.3µH 3 4 PGND 1 VIN C2 CIN 10µF VIN C1 CIN 5 16 PGND VIN VIN 12V VOUT 5.0V C3 COUT 22µF PGND PGND PGND Reference Designator Manufacture Part Number Manufacture Configuration (mm) ROHM VQFN016V3030 GRM31CR61E106KA12 MURATA 3216 16V, X5R, ±20% GRM31CR61C226ME15 MURATA 3216 0.01µF 25V, B, ±10% GRM155B11E103KA01 MURATA 1005 Ceramic 0.022µF Capacitor 16V, B, ±10% GRM155B11C223KA01 MURATA 1005 ±20%, 6.1A(L=–20%), DCR=28mΩ Max. FDSD0630-H-3R3M TOKO 7066 ±20%, 7.3A(L=–20%), DCR=29.7mΩ Max. SPM6530T-3R3M TDK-EPC 7165 ±30%, 4.0A(L=–30%), DCR=35.1mΩ Max. NRS5040T 3R3NMGJ TAIYO YUDEN 4949 ±20%, 5.5A(L=–30%), DCR=28.6mΩ Max. XAL4030-332ME COILCRAFT 4040 Type Value Description IC - Buck DC/DC Converter, 3A BD95831MUV C1, C2 Ceramic Capacitor 10µF 25V, X5R, ±10% C3, C4 Ceramic Capacitor 22µF C5 Ceramic Capacitor C6 IC L1 Inductor 3.3µH C4 COUT R1 Resistor 100kΩ 1/16W, 50V, 5% MCR01MZPJ104 ROHM 1005 R2 Resistor 24kΩ 1/16W, 50V, 1% MCR01MZPF2402 ROHM 1005 R3 Resistor 680Ω 1/16W, 50V, 5% MCR01MZPJ681 ROHM 1005 R4 Resistor 4.7kΩ 1/16W, 50V, 1% MCR01MZPF4701 ROHM 1005 Evaluation Board of May 1st, 2013. 56O6682E 05.2013 PDF 22µF PGND