78xxSR Series www.murata-ps.com 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts FEATURES Murata Power Solutions’ 7805SR-C (5V output), 7812SR-C (12V output) and 7803SR-C (3.3V output) step-down switching regulators are modern drop-in replacements for older, 3.3V/0.5A, 5V/0.5A or 12V/0.4A outputs; Pin and ineffi cient, LM7805 and LM7812 linear regulators. The 78XXSR's are pin- and size-compat- size-compatible with LM7805 & LM7812 regulators ible with industry-standard TO-220 SIP packages. A 260kHz switching frequency provides Up to 95% effi ciency–no heat sinks or thermal for effi ciencies as high as 95%. Full-load (up to 0.5A) operation from 9V, 12V, 24V, or 36V derating required supplies at ambient temperatures up to +70°C requires no heat sinks, no temperature Two SIP-packages fi t existing TO-220 footprints: derating, no forced-air cooling, and no external capacitors. - Vertical-pin models occupy less than 0.1 square in. 78SR switching regulators provide many signifi cant improvements over their linear coun- - Optional horizontal pins provide 0.350 in. installed terparts: lower quiescent current (3mA vs. 5 mA), higher input voltage (40V vs. 32V), and height better output accuracy (±2% vs. ±5%). All these features combine to make 78SR regulators ideal for new or existing LM7805 & LM7812 applications requiring full-load operation at +7.5-36Vdc operating input range; Low 3mA elevated voltages. quiescent current Built-in fi lter capacitors–no external components TECHNICAL NOTES required 1. Input/Output (I/O) Filtering: As shown in the noise and ripple graphs, 78SR switching –40 to +70°C operation at full load; Short-circuit regulators exhibit excellent low-noise performance with no external I/O capacitors. protection However, if additional noise reduction is required, be sure to use low-ESR capacitors  Excellent load (±0.2%) and line (±0.3%) regulation that are rated for continuous operation (with an additional 20% safety margin) at the highest system voltages and temperatures. Adding external output capacitors will also Ideal for powering instrumentation from improve the unit’s load-transient response. 9V/12V/24V/28V supplies or batteries Applications in which 78SR regulators are located more than 24 inches (61cm) from Can be used with unregulated dc supplies the input power supply should include an external 47uF/50V (or greater) aluminum protection electrolytic capacitor, connected as close as possible to the regulator’s +Vin and GND terminals (pins 1 and 2). An external input capacitor is particularly important if the input voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at turn-on can produce large inductive current-spikes, and these current spikes can generate damaging voltage transients at the regulator’s input terminals. 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Effi ciency Curves as a Ordering Information guide to selecting an appropriate slow-blow fuse. MPS Part No. Output Output Input 3. Input-Output Isolation: 78SR regulators’ internal input and output circuits share a Voltage Current Voltage common connection (GND, pin 2); there is no electrical isolation between the INPUT (pin 1) and OUTPUT (pin 3) terminals. Standard Pin Package 7803SR-C +3.3Vdc 0.5A +7.5-36Vdc 4. Overvoltage Protection: 78SR switching regulators do not provide input or output 7805SR-C +5.0Vdc 0.5A +7.5-36Vdc overvoltage protection. In the extremely rare situation in which a catastrophic failure 7812SR-C +12.0Vdc 0.4A +15-36Vdc occurs, the output voltage may rise to excessively high levels. If your load must be protected against all possible overvoltage situations, external voltage-limiting circuitry Horizontal Pin Package 7803SRH-C +3.3Vdc 0.5A +7.5-36Vdc must be provided. 7805SRH-C +5.0Vdc 0.5A +7.5-36Vdc 5. Operation at 40Vdc: Operating with inputs up to 40Vdc is permissible if, for inputs 7812SRH-C +12.0Vdc 0.4A +15-36Vdc between 36 and 40Vdc, the maximum load current is reduced to 0.35A for 7805SR-C and 7803SR-C, and to 0.3A for 7812SR-C. Under no circumstances should the input voltage be allowed to exceed 45Vdc. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 1 of 7

78xxSR Series 3.3V/5V/12V Outputs High-Effi ciency TECHNICAL NOTES (continued) Switching Regulators with LM78xx Pinouts 6. Soldering & Handling Precautions: All units are designed to be hand soldered to pc-boards using no-clean solders (+260°C, 5 seconds max.). Water-soluble solders can also be used, but the units must be washed Performance/Functional Specifi cations and dried using processes appropriate to the type of solder employed. See the Mechanical Specifi cations section for pin 1 orientation and Typical at TA = +25°C recommended plated-through hole dimensions. Input/Output While 78SR regulators easily withstand a 2kV ESD discharge to any ter- Models 7803SR-C 7805SR-C 7812SR-C minal (using human body model), they should always be treated as ESD Output Voltage +3.3Vdc +5.0Vdc +12.0Vdc sensitive devices. Rated Output Current 0.5A 0.5A 0.4A 7. Horizontal-Pin Models (78XXSRH-C): 78XXSRH-C switching regulators Output Voltage Accuracy ±2% ±2% ±2% are pin-compatible replacements for TO-220 style LM78XX linear regula- Input Voltage Range ➀ +7.5-36Vdc +7.5-36Vdc +15-36Vdc tors that are installed with their metal tabs lying fl at on the surface of the Line Regulation (100% load) ±0.3% ±0.3% ±0.3% pc-board. However, because the surface of inductor L1 on 78XXSRH-C Load Regulation (0-100% load) ±0.2% ±0.2% ±0.2% models is electrically conductive, it must not be allowed to come in con- Quiescent Current 3mA typ., 5mA max. tact with any exposed pc-board traces, other than power ground (GND). Input Current See Performance Curves While the 2-mil-thick (0.05mm) polyester label attached to L1 provides Effi ciency See Performance Curves some degree of electrical insulation (only if L1 sits perfectly fl at on the Transient Response See Performance Curves pc-board), it is recommended that a 0.020” (0.5mm) clearance be main- tained between L1 and all exposed pc-board traces. Input & Output Noise See Performance Curves 8. Dropout Voltage: 78SR series regulators described in this data sheet Short Circuit Protection ➁ Continuous specify a minimum input voltage at which full-load accuracy and output Isolation None regulation are guaranteed (7.5V for 7803SR-C and 7805SR-C, and 15.0V Overvoltage Protection None for 7812SR-C). However, these devices will stay in regulation at lower Undervoltage Protection None input voltages if they are operated at less than their rated loads. Environmental The following dropout-voltage data, derived from sample testing Models 7803SR-C 7805SR-C 7812SR-C performed at an ambient temperature of +25°C with resistive loads, should be used for information purposes only. For these tests, a unit was Operating Temperature –40 to +70°C considered to be out of regulation when its output changed by more Storage Temperature –40 to +85°C +/–0.005Vdc from its nominal value. All voltages were measured directly Cooling Free Air Convection at the regulator’s I/O pins. Humidity (Non-condensing) 0 to 85% Physical Mechanical See Mechanical Specifi cations Package Open-frame SIP Pins 0.025” (0.64mm) square, Typical Dropout Voltage tin-plated bronze Weight 0.08 ounces (2.2g) 0% Load 25% Load 50% Load 100% Load Pin Soldering +260°C for 5 seconds 7803SR-C 6.0V 6.2V 6.2V 6.3V ➀ See Technical Note 5. 7805SR-C 6.3V 6.2V 6.2V 6.8V ➁ While these regulators can withstand a continuous short-circuit across their 7812SR-C 12.8V 13.0V 12.8V 13.0V output terminals, they will experience a signifi cant temperature rise. Extended short-circuit operation will adversely affect the unit’s reliability. www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 2 of 7

78xxSR Series 3.3V/5V/12V Outputs High-Effi ciency Typical Performance Curves TA = +25°C, VIN as indicated Switching Regulators with LM78xx Pinouts Noise and Ripple - 10% and 100% Load, 20MHz Bandwidth 7803SR-C Vin = 12V, ILOAD = 50mA 7805SR-C Vin = 12V, ILOAD = 50mA 7812SR-C Vin = 24V, ILOAD = 40mA 7803SR-C Vin = 12V, ILOAD = 500mA 7805SR-C Vin = 12V, ILOAD = 500mA 7812SR-C Vin = 24V, ILOAD = 400mA www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 3 of 7

78xxSR Series 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts Transient Response - 90% Load Step 7803SR-C 10% to 100% Load Step 7805SR-C 10% to 100% Load Step 7812SR-C 10% to 100% Load Step VIN = 9V VIN = 9V VIN = 18V 7803SR-C 100% to 10% Load Step 7805SR-C 100% to 10% Load Step 7812SR-C 100% to 10% Load Step VIN = 9V VIN = 9V VIN = 18V www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 4 of 7

78xxSR Series 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts Effi cience Curves 7803SR-C Effi ciency 7803SR-C Input Current 90 0.25 85 80 100% LOAD S) 0.20 P CY 75 50% LOAD T (AM 0.15 100% LOAD N 70 N E 25% LOAD E FICI 65 URR 0.10 50% LOAD EF 60 T C U 0.05 P 55 N I 25% LOAD 50 0.00 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 INPUT VOLTAGE INPUT VOLTAGE 7805SR-C Effi ciency 7805SR-C Input Current 95 0.35 90 0.30 S) 85 100% LOAD MP 0.25 A NCY 80 50% LOAD NT ( 0.20 100% LOAD E E EFFICI 7705 25% LOAD UT CURR 00..1105 50% LOAD P N 65 0.05 25% LOAD 60 0.00 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 INPUT VOLTAGE INPUT VOLTAGE 7812SR-C Effi ciency 7812SR-C Input Current 100 0.40 0.35 95 100% LOAD S) P 0.30 90 AM 100% LOAD CY 50% LOAD T ( 0.25 N N EFFICIE 8805 25% LOAD T CURRE 00..1250 50% LOAD PU 0.10 N 75 I 0.05 25% LOAD 70 0.00 14 16 18 20 22 24 26 28 30 32 34 36 14 16 18 20 22 24 26 28 30 32 34 36 INPUT VOLTAGE INPUT VOLTAGE www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 5 of 7

78xxSR Series 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts SHIPPING TRAYS AND BOXES EACH FOAM TRAY (2300276) CONTAINS 50 UNITS IN FULL MPQ QUANTITIES, TWO TRAYS EQUAL TO A TOTAL OF 100(2x50) UNITS PER CARTON. www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 6 of 7

78xxSR Series 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78xx Pinouts MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES: 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254) Standard Package 0.19 0.41 (4.8) (10.4) L1 0.75 (19.1) 11 Pins: 0.025 (0.64) sq. 1 2 3 0.100 (2.54) 0.15 centers (3.8) Min. PC-Board Hole: 0.23 0.037 - 0.043 IN G O (0.94 - 1.09) Dia. P N U (5.7) U D T T P (+ UT V)IN (+V O U T ) low-profi le package 0.07 (1.8) 0.37 (9.3) max. LLL111 1 2 3 0.15 Pins: 0.025 (0.64) sq. (3.8) min. 0.100 (2.54) centers IN G O P N U PC-Board Hole: Horizontal Package UT D TP 0.037 - 0.043 (H Pin Option) (+ UT (0.94 - 1.09) Dia. V) IN (+VO U T ) This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support 30 Oct 2015 MDC_78xxSR Series.B07 Page 7 of 7

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: 7803SR-C 7803SRH-C 7805SR-C 7805SRH-C 7812SR-C 7812SRH-C