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CS51031 Datasheet(PDF) 1 Page - ON Semiconductor |
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CS51031 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 10 page VGATE PGND COSC GND VC CS VCC VFB RVCC 100 W CVCC 0.1 mF CS 0.1 mF COSC 470 pF VGATE RA 1.5 k W RB 2.5 k W CRR 0.1 mF CO 100 mF × 2 VO 3.3 V @ 3 A L 4.7 mH MBRS360 D1 5.0 V−12 V CIN 47 mF MP1 IRF7416 Figure 1. Typical Application Diagram © Semiconductor Components Industries, LLC, 2005 October, 2005 − Rev. 11 1 Publication Order Number: CS51031/D CS51031 Fast P−Ch FET Buck Controller The CS51031 is a switching controller for use in DC−DC converters. It can be used in the buck topology with a minimum number of external components. The CS51031 consists of a VCC monitor for controlling the state of the device, 1.0 A power driver for controlling the gate of a discrete P−Channel transistor, fixed frequency oscillator, short circuit protection timer, programmable Soft−Start, precision reference, fast output voltage monitoring comparator, and output stage driver logic with latch. The high frequency oscillator allows the use of small inductors and output capacitors, minimizing PC board area and systems cost. The programmable Soft−Start reduces current surges at startup. The short circuit protection timer significantly reduces the duty cycle to approximately 1/30 of its cycle during short circuit conditions. Features • 1.0 A Totem Pole Output Driver • High Speed Oscillator (700 kHz max) • No Stability Compensation Required • Lossless Short Circuit Protection • VCC Monitor • 2.0% Precision Reference • Programmable Soft−Start • Wide Ambient Temperature Range: ♦ Industrial Grade: −40 °C to 85°C ♦ Commercial Grade: 0 °C to 70°C • Pb−Free Packages are Available PIN CONNECTIONS 51031 = Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week x = Continuation of Device Code x = Y or G G = Pb−Free Package SOIC−8 D SUFFIX CASE 751 1 8 MARKING DIAGRAM VFB GND VCC COSC CS PGND VC VGATE 1 http://onsemi.com See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. ORDERING INFORMATION 51031 ALYWx G 1 8 |
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