OKI-78SR-12/1.0-W36HE-C

PRELIMINARY OKI-78SR-E Series Encapsulated Non-Isolated Switching Regulator DC-DC Typical units FEATURES PRODUCT OVERVIEW
7-36Vin (3.3 & 5Vout), 15-36Vin (12Vout) Encapsulated in a 0.47 x 0.69 inch (11.9 x 17.6 mm) vertical or horizontal package, the OKI78SR-E series are non-isolated switching regulator (SR) DC-DC power converters for embedded applications. The fixed single output converters offer both tight regulation and high efficiency directly at the power usage site and are a direct plug-in replacement for TO-220 package 78xx series linear regulators. Typically, no extra outside components are required.
Fixed Output: 3.3 or 5V @ 1.5A or 12V @ 1.0A
Vertical SIP or horizontal mount, small footprint, in an Encapsulated package
“No heat sink” direct replacement for 3-terminal 78xx-series linear regulators
High efficiency with no external components
Short circuit protection
Outstanding thermal derating performance
UL/EN/IEC 60950-1, 2nd Edition safety approvals Three nominal output voltages are offered (3.3, 5 and 12 VDC), up to 1.5 Amp maximum output. Based on fixed-frequency buck switching topology, the high efficiency means very low heat and little electrical noise, requiring no external components. The 3.3 and 5Vout models have an ultra wide input range of 7 to 36 Volts DC and the 12Vout model has an input voltage range of 15 to 36V. Protection features include short circuit current limit protection. The OKI-78SR-E is designed to meet all standards approvals. RoHS-6 (no lead) hazardous material compliance is specified as standard. Connection Diagram +Vin +Vout • Switching F1 Controller • Filters • Current Sense External DC Power Source Reference and Error Amplifier Common Common Figure 1. OKI-78SR-E Note: Murata Power Solutions strongly recommends an external input fuse, F1. See specifications. (Pending) For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_OKI-78SR-W36E.A01.D3 Page 1 of 20 OKI-78SR-E Series Encapsulated Non-Isolated Switching Regulator DC-DC FUNCTIONAL SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output IOUT (Amps Power max) (Watts) Root Model VOUT (Volts) OKI-78SR-3.3/1.5-W36E-C 3.3 1.5 OKI-78SR-5/1.5-W36E-C 5 OKI-78SR-12/1.0-W36E-C 12 R/N (mVp-p) Input Regulation (Typ.) VIN Nom. Range (Volts) (Volts) IIN, IIN, no load full load (mA) (Amps) Max. Line Load 4.95 40 ±0.30% ±0.40% 12 7-36 5 1.5 7.5 75 ±0.30% ±0.40% 12 7-36 1.0 12 75 ±0.25% ±0.25% 24 15-36 Efficiency Min. Typ. 0.48 84% 85.5% 5 0.69 89% 90.5% 5 0.53 93.5% 95.3% Package Inches (mm) 0.47 x 0.69 x 0.40 (11.9 x 17.6 x 10.0) 0.47 x 0.69 x 0.40 (11.9 x 17.6 x 10.0) 0.47 x 0.69 x 0.40 (11.9 x 17.6 x 10.0) NOTE: All specifications are at nominal line voltage, Vout = nominal and full load, +25˚C.with no external capacitor, unless otherwise noted. NOTE: Please click here to view the data sheet for the OKI-78SR “Open-frame” series. www.murata-ps.com/support MDC_OKI-78SR-W36E.A01.D3 Page 2 of 20 OKI-78SR-E Series Encapsulated Non-Isolated Switching Regulator DC-DC FUNCTIONAL SPECIFICATIONS – OKI-78SR-3.3/1.5-W36E-C ABSOLUTE MAXIMUM RATINGS Minimum Typical/Nominal Maximum Units Conditions ① Full power operation 0 36 Vdc Input Voltage, Continuous None, install external fuse None Vdc Input Reverse Polarity 0 5.15 W Output Power Current-limited, no damage, short-circuit protected 0 1.5 A Output Current Vin = Zero (no power) -55 125 °C Storage Temperature Range Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied or recommended. INPUT 7 12 36 Vdc Operating voltage range Fast blow 2 A Recommended External Fuse None, install external fuse None Vdc Reverse Polarity Protection ⑨ C-TYPE Internal Filter Type Input current 0.48 0.51 A Full Load Conditions Vin = nominal 0.80 0.85 A Low Line Vin @ min 0.16 A2-Sec. Inrush Transient 5 mA Short Circuit Input Current Vin = nominal 5 10 mA No Load Input Current 1 mA Shut-Down Mode Input Current (Cin = 2 X 100uF, CBus = 1000uF, LBus = 1uH) 50 mA, pk-pk Reflected (back) ripple current ② GENERAL and SAFETY @ Vin nom, 3.3Vout 83.7 85.5 % Efficiency @ Vin min, 3.3Vout 87.0 88.4 % Certified to UL-60950-1, IEC/EN60950-1, Safety Yes 2nd Edition Per Telcordia SR332, issue 1, class 3, ground 78.7 Hours x 106 Calculated MTBF ④ fixed, Tambient=+25°C DYNAMIC CHARACTERISTICS 500 kHz Fixed Switching Frequency 50-100-50% load step, settling time to within Dynamic Load Response 25 50 μSec ±2% of Vout di/dt =1A/μSec same as above 100 150 mV Dynamic Load Peak Deviation www.murata-ps.com/support MDC_OKI-78SR-W36E.A01.D3 Page 3 of 20 OKI-78SR-E Series Encapsulated Non-Isolated Switching Regulator DC-DC FUNCTIONAL SPECIFICATIONS – OKI-78SR-3.3/1.5-W36E-C (CONT.) OUTPUT Total Output Power Voltage Nominal Output Voltage Range Setting Accuracy Output Voltage Overshoot - Startup: Current Output Current Range Minimum Load ⑪ Current Limit Inception Short Circuit Mode ⑥⑪ Short Circuit Current Short Circuit Duration (remove short for recovery) Short circuit protection method ⑧ Regulation ⑩ Total Regulation Band Line Regulation Load Regulation Ripple and Noise (20MHz BW ) ⑪ Temperature Coefficient Maximum Capacitive Loading Maximum Capacitive Loading MECHANICAL Outline Dimensions Conditions At 50% load 98% of Vnom., after warmup @3.3Vout Minimum 0 Typical/Nominal 4.95 Maximum 5.15 Units W 3.168 -4 3.3 3.432 4 3 Vdc % of Vnom. %Vo nom 0 1.5 No minimum load 3.50 1.5 A 5.00 A 2.50 Hiccup technique, autorecovery within ±1% of Vout 0.01 Output shorted to ground, no damage Continuous Current limiting Over all line, load and temp conditions Vin=min. to max. Vout=nom. Iout=min. to max. 3.3Vo, 12Vin At all outputs low ESR; >0.001, 0.001, 0.001,