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LD1117S25C 数据表(PDF) 1 Page - STMicroelectronics |
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LD1117S25C 数据表(HTML) 1 Page - STMicroelectronics |
1 / 38 page December 2006 Rev. 20 1/38 38 LD1117 series Low drop fixed and adjustable positive voltage regulators Feature summary ■ Low dropout voltage (1V TYP.) ■ 2.85V Device performances are suitable for SCSI-2 active termination ■ Output current up to 800 mA ■ Fixed output voltage of: 1.2V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V ■ Adjustable version availability (Vrel=1.25V) ■ Internal current and thermal limit ■ Available in ± 1% (at 25°C) and 2% in full temperature range ■ Supply voltage rejection: 75dB (typ.) Description The LD1117 is a LOW DROP Voltage Regulator able to provide up to 800mA of Output Current, available even in adjustable version (Vref=1.25V). Concerning fixed versions, are offered the following Output Voltages: 1.2V,1.8V,2.5V,2.85V, 3.0V 3.3V and 5.0V. The 2.85V type is ideal for SCSI-2 lines active termination. The device is supplied in: SOT-223, DPAK, SO-8 and TO-220. The SOT-223 and DPAK surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. In fact in this case, unlike than PNP one, the Quiescent Current flows mostly into the load. Only a very common 10µF minimum capacitor is needed for stability. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1% at 25°C. The ADJUSTABLE LD1117 is pin to pin compatible with the other standard. Adjustable voltage regulators maintaining the better performances in terms of Drop and Tolerance. DPAK SO-8 TO-220 SOT-223 www.st.com Block diagram |
类似零件编号 - LD1117S25C |
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类似说明 - LD1117S25C |
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