link to page 20 Boost Regulators, 1.5 A, 280 kHz/560 kHz CS5171, CS5172, CS5173, CS5174 The CS5171/2/3/4 products are 280 kHz/560 kHz switching regulators with a high efficiency, 1.5 A integrated switch. These parts www.onsemi.com operate over a wide input voltage range, from 2.7 V to 30 V. The flexibility of the design allows the chips to operate in most power supply configurations, including boost, flyback, forward, inverting, 8 and SEPIC. The ICs utilize current mode architecture, which allows 1 excellent load and line regulation, as well as a practical means for SOIC−8 limiting current. Combining high frequency operation with a highly D SUFFIX integrated regulator circuit results in an extremely compact power CASE 751 supply solution. The circuit design includes provisions for features such as frequency synchronization, shutdown, and feedback controls for either positive or negative voltage regulation. These parts are MARKING DIAGRAM AND pin−to−pin compatible with LT1372/1373. PIN CONNECTIONSCS5171/3 1 8 Part NumberFrequencyFeedback Voltage Polarity VC V AL 517xy SW CS5171 280 kHz positive FB G YW PGND CS5172 280 kHz negative Test AGND CS5173 560 kHz positive SS VCC CS5174 560 kHz negative Features • CS5172/4 Integrated Power Switch: 1.5 A Guaranteed 1 8 • Wide Input Range: 2.7 V to 30 V V V C AL 517xy SW • Test PGND High Frequency Allows for Small Components G YW • NFB AGND Minimum External Components SS V • CC Easy External Synchronization • Built in Overcurrent Protection • Frequency Foldback Reduces Component Stress During an 517xy = Device Code Overcurrent Condition x= 1, 2, 3, or 4 • y= E, G Thermal Shutdown with Hysteresis A = Assembly Location • Regulates Either Positive or Negative Output Voltages L = Wafer Lot • Shut Down Current: 50 mA Maximum Y = Year W = Work Week • Pin−to−Pin Compatible with LT1372/1373 G = Pb−Free Package • Wide Temperature Range ♦ Industrial Grade: −40°C to 125°C ♦ Commercial Grade: 0°C to 125°C • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS ORDERING INFORMATION Compliant See detailed ordering and shipping information in the package dimensions section on page 20 of this data sheet.