LSR7810 Series Low Cost, Miniature 1.0A Surface Mount POL Switching Regulators Electrical Specifications Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice. Output Key Features: • Efficiency to 93% • 1.0A Output Current • Compact SMT Case • LM78xx Replacement • Wide Input Range • Remote ON/OFF Control • Adjustable Output Voltage • Short Circuit Protected • Thermal Shutdown • Low Noise • Low Low Cost Parameter Output Voltage Accuracy Output Voltage Adjustment Range Line Regulation Load Regulation Conditions Typ. ±2.0 Contact Factory For Information VIN = Min to Max ±0.2 IOUT = 10% to 100% ±0.4 20 See Output Filter Circuit (Page 2) 10 See Note 1 150 Ripple & Noise (20 MHz) Thermal Shutdown Temperature Coefficient Maximum Capacitive Load Output Current Limit Output Short Circuit Min. Max. ±3.0 Units % ±0.5 ±1.0 35 15 % % 0.02 1,000 1.8 Hiccup Mode, Continuous (Autorecovery) mV P - P °C %/°C µF A General Parameter Isolation Voltage Switching Frequency Conditions Min. Not Isolated Typ. Max. 1.40 Units MHz Remote On/Off Parameter Supply On Supply Off ON/OFF Control Current Standby Input Current Conditions See Note 2 Min. 1.2 Typ. 100 120 Max. 6.0 0.6 200 200 Units VDC VDC µA µA Environmental Parameter Operating Temperature Range Operating Temperature Range Storage Temperature Range Lead Temperature Derating Cooling Humidity Conditions Max. Units +85 °C +100 °C -55 +125 °C 1.5 mm From Case For 10 Sec 260 °C Over 71°C, derate output power 2.85%/°C to 60% at 85°C Free Air Convection RH, Non-condensing 95 % Ambient Case Min. -40 Typ. +25 Physical Case Size Case Material Weight See Mechanical Diagram (Page 2) Non-Conductive Black Plastic (UL-94V0) 0.08 Oz (2.3g) Reliability Specifications Parameter MTBF Conditions MIL HDBK 217F, 25°C, Gnd Benign Min. 1.0 Typ. Max. Characteristic Curves MicroPower Direct 292 Page Street Suite D Stoughton, MA 02072 USA T: (781) 344-8226 F: (781) 344-8481 E: [email protected] W: www.micropowerdirect.com Efficiency vs Load (VIN=Nom) Ripple vs Load (VIN = Nom) www.micropowerdirect.com Units MHours www.micropowerdirect.com Model Selection Guide Model Number LSR7810-015W LSR7810-018W LSR7810-02W LSR7810-03W LSR7810-05W LSR7810-06W Input Voltage (VDC) Output Current Voltage (VDC) Efficiency (%, Max) Current Nom. Range (mA) Nom. Adj Range (A) Min VIN Max VIN 12 12 12 12 12 12 4.75 - 15.0 4.75 - 15.0 5.0 - 18.0 5.0 - 18.0 7.0 - 18.0 8.5 - 18.0 165 190 245 320 460 580 1.5 1.8 2.5 3.3 5.0 6.5 Fixed 1.5 - 3.6 1.5 - 3.9 1.8 - 5.5 2.5 - 6.5 Fixed 1.0 1.0 1.0 1.0 1.0 1.0 76 79 83 84 90 93 74 77 81 84 88 91 Derating Curve Notes: 1. Measured at an internal IC junction. 2. If the control pin (pin 10) is left open, the unit operates. If the control pin is grounded, the unit is off. 3. This regulator is not designed to be used in parallel with another unit to increase output power. 4. The input should not exceed the range given in the model selection chart. Exceeding this limit could damage the unit. 5. If the output voltage is adjusted, the input/output relationship must meet: VIN - VOUT = >2V. Attempting to operate below this differential could damage the unit. Typical Application Circuits The figure at above shows a typical connection of the LSR7810. Some notes on this connection are: 1. C1 & C2 are low ESR ceramic capacitors used to minimize noise at the regulator. A tantalum or low ESR electrolytic capacitor may also be used. These capacitors are required and should be mounted as close to the regulator pins as possible. 2. R1 & R2 are used to adjust the regulator output. If this is not required, the VADJ pin (pin 6) should be connected to ground through 470 pF ceramic capacitor. For more information on adjusting the output, please contact the factory. 3. A simple LC network may be used to improve the output ripple of the unit. This is illustrated by LOUT and COUT. Mechanical Dimensions Pin Connection Pin Function 1 +VIN 5 +VOUT 6 VADJ Pin Function 7 Gnd 9 Gnd 10 Control Solder Layout MicroPower Direct We Power Your Success - For Less! 292 Page Street Ste D Stoughton, MA 02072 • TEL: (781) 344-8226 • Notes: • All dimensions are typical in inches (mm) • Tolerance x.xx = ±0.02 (±0.50) • Pin 1 is marked by a “dot” or indentation on the side of the unit FAX: (781) 344-8481 • E-Mail: [email protected]