OKI-78SR Series Non-Isolated Switching Regulator DC-DC New 12V Model Typical units PRODUCT OVERVIEW FEATURES Fabricated on a 0.41 x 0.65 inch (10.4 x 16.5 Three nominal output voltages are offered (3.3, 7-36Vin (3.3 & 5Vout), 15-36Vin (12Vout) mm) Single Inline Package (SIP) module, the OKI- 5 and 12 VDC), up to 1.5 Amp maximum output. Fixed Output: 3.3 or 5V 1.5A or 12V 1.0A 78SR series are non-isolated switching regulator Based on xed-frequency buck switching Vertical SIP or horizontal mount, small footprint (SR) DC-DC power converters for embedded ap- topology, the high efciency means very low heat package plications. The xed single output converters offer and little electrical noise, requiring no external both tight regulation and high efciency directly at components. The 3.3 and 5Vout models have an No heat sink direct replacement for 3-terminal the power usage site and are a direct plug-in ultra wide input range of 7 to 36 Volts DC and the 78xx-series linear regulators replacement for TO-220 package 78xx series 12Vout model has an input voltage range of 15 to High efciency with no external components linear regulators. Typically, no extra outside 36V. Short circuit protection components are required. Protection features include short circuit current Outstanding thermal derating performance limit protection. The OKI-78SR is designed to UL/EN/IEC 60950-1, 2nd Edition safety approvals meet all standards approvals. RoHS-6 (no lead) hazardous material compliance is specied as standard. Connection Diagram +Vin +Vout Switching F1 Filters Controller Current Sense External DC Power Reference and Source Error Amplier Common Common Figure 1. OKI-78SR Note: Murata Power Solutions strongly recommends an external input fuse, F1. See specications. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC OKI-78SR-W36.C05 Page 1 of 20 OKI-78SR Series Non-Isolated Switching Regulator DC-DC FUNCTIONAL SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Input IOUT R/N (mVp-p) Regulation (Typ.) IIN, IIN, Efficiency VOUT (Amps Power VIN Nom. Range no load full load Package Root Model (Volts) max) (Watts) Max. Line Load (Volts) (Volts) (mA) (Amps) Min. Typ. Inches (mm) 0.41 x 0.34 x 0.65 OKI-78SR-3.3/1.5-W36-C 3.3 1.5 4.95 40 0.25% 0.40% 12 7-36 5 0.48 84% 85.5% (10.4 x 8.64 x 16.5) 0.41 x 0.34 x 0.65 OKI-78SR-5/1.5-W36-C 5 1.5 7.5 75 0.25% 0.40% 12 7-36 5 0.69 89% 90.5% (10.4 x 8.64 x 16.5) 0.41 x 0.34 x 0.65 NEW OKI-78SR-12/1.0-W36-C 12 1.0 12 75 0.25% 0.25% 24 15-36 5 0.53 93.5% 95.3% (10.4 x 8.64 x 16.5) NOTE: All specifications are at nominal line voltage, Vout = nominal and full load, +25C.with no external capacitor, unless otherwise noted. PART NUMBER STRUCTURE OKI - 78SR - 3.3 / 1.5 - W36 H - C RoHS-6 Hazardous Substance Compliance Okami Non-Isolated PoL Blank: Vertical Mount 78SR Series H Sufx: Horizontal Mount Note: Some model number combinations Maximum Rated Output in Volts may not be available. Input Voltage Range Contact Murata Power Solutions. 7-36V (3.3 & 5Vo) Maximum Rated Output 15-36V (12Vo) Current in Amps Product Label Because of the small size of these products, the product label contains a Model Number Product character-reduced code to indicate the model number and manufacturing date Code OKI-78SR-3.3/1.5-W36-C I33115 code. Not all items on the label are always used. Please note that the label dif- fers from the product photograph on page 1. Here is the layout of the label: OKI-78SR-5/1.5-W36-C I50115 The label contains three rows of information: OKI-78SR-12/1.0-W36-C I12110 OKI-78SR-3.3/1.5-W36H-C I33115H OKI-78SR-5/1.5-W36H-C I50115H XXXXXX Product code OKI-78SR-12/1.0-W36H-C I12110H Mfg. date YMDX Rev. Revision level code The manufacturing date code is four characters: First character Last digit of manufacturing year, example 2009 Second character Month code (1 through 9 = Jan-Sep O, N, D = Oct, Nov, Dec) Figure 2. Label Artwork Layout Third character Day code (1 through 9 = 1 to 9, 10 = 0 and First row Murata Power Solutions logo 11 through 31 = A through Z) Second row Model number product code (see table) Fourth character Manufacturing information Third row Manufacturing date code and revision level www.murata-ps.com/support MDC OKI-78SR-W36.C05 Page 2 of 20