LSR7805 Series Low Cost, Miniature 500 mA 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 96% • 0.5A Output Current • Compact SMT Case • LM78xx Replacement • Wide Input Range • 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 Ripple & Noise (20 MHz) Thermal Shutdown Quiescent Current Temperature Coefficient Maximum Capacitive Load Output Current Limit Short Circuit Input Power Output Short Circuit Conditions Min. Typ. Max. ±2.0 ±3.0 Contact Factory For Information ±0.2 ±0.5 VIN = Min to Max IOUT = 10% to 100% ±0.3 ±0.75 10 25 See Note 2 160 See Note 3 15 0.02 1,000 1.8 0.5 1.8 Continuous (Autorecovery) Units % % % mV P - P °C mA %/°C µF A W General Parameter Isolation Voltage Switching Frequency Conditions Min. Not Isolated Typ. Max. 410 Units kHz Environmental Parameter Operating Temperature Range Operating Temperature Range Storage Temperature Range Lead Temperature Cooling Humidity Conditions Ambient Case Min. -40 Typ. +25 -55 1.5 mm From Case For 10 Sec Free Air Convection RH, Non-condensing Max. +85 +100 +125 300 Units °C °C °C °C 95 % 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 Typical Application Circuits 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 Min. 2.0 Typ. Max. Units MHours Component Values Model Number LSR7805-03W LSR7805-05W LSR7805-09W LSR7805-12W LSR7805-15W Ceramic Capacitors C1 C2 10 µF/50V 22 µF/ 16V 10 µF/50V 22 µF/ 16V 10 µF/50V 22 µF/ 16V 10 µF/50V 10 µF/ 25V 10 µF/50V 10 µF/ 25V Notes: 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. 2. C1 & C2 are required and should be mounted as close to the regulator pins as possible. C3 is required for optimum performance, use 100 µF OR more. 3. 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 suggested values, please contact the factory. www.micropowerdirect.com www.micropowerdirect.com Model Selection Guide Model Number LSR7805-03W LSR7805-05W LSR7805-09W LSR7805-12W LSR7805-15W Input Voltage (VDC) Nom. 12 12 24 24 24 Range 4.5 - 28.0 6.0 - 28.0 11.0 - 28.0 14.0 - 28.0 17.0 - 28.0 Notes: 1. Load regulation is specified for an output load change of 10% to 100%. 2. Measured at an internal IC junction. 3. Quiescent current is specified at 0% load for VIN = Min to Max. 4. This regulator is not designed to be used in parallel with another unit to increase output power. 5. The remote on/off control current is typically 2 µA. Shutdown input current is 30 µA max. The On/Off shutdown threshold voltage is 1.1V to 1.4V. On Off Output Voltage Adj Range Characteristic Curves Efficiency (%, Typ) Current (VDC) (VDC) (mA, Max) 3.3 5.0 9.0 12.0 15.0 1.8 - 5.5 2.5 - 8.0 3.0 - 11.5 4.5 - 13.5 4.5 - 15.5 500.0 500.0 500.0 500.0 500.0 Min VIN 90 94 95 95 96 Max VIN 75 81 87 90 92 Derating Curve Efficiency vs Input Voltage (Full Load) Min Max Open or 1.5V<Vc<6.0 VDC Ground or 0.0V<Vc<1.0 VDC 6. The input should not exceed the range given in the model selection chart. Exceeding this limit could damage the unit. Mechanical Dimensions Efficiency vs Load (Vin = Nom) Solder Layout Ripple vs Input Voltage (Full Load) Pin Connection Pin Function 1 +VIN 5 +VOUT 6 VADJ Pin Function 7 Gnd 9 Gnd 10 Control Ripple vs Load (Vin = Nom) 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 = ±0.01 (±0.25) • Pin 1 is marked by a “dot” or indentation on the side of the unit FAX: (781) 344-8481 • E-Mail: [email protected]