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LD1117ADT33TR データシート(PDF) 1 Page - STMicroelectronics |
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LD1117ADT33TR データシート(HTML) 1 Page - STMicroelectronics |
1 / 24 page This is information on a product in full production. July 2013 DocID7194 Rev 26 1/24 LD1117A Low drop fixed and adjustable positive voltage regulators Datasheet - production data Features • Low dropout voltage: – 1.15 V typ. @ IOUT = 1 A, 25 °C • Very low quiescent current: – 5 mA typ. @ 25 °C • Output current up to 1 A • Fixed output voltage of: – 1.2 V, 1.8 V, 3.3 V • Adjustable version availability (VREF = 1.25 V) • Internal current and thermal limit • Only 10 µF for stability • Available in ± 2% (at 25 °C) and 4% in full temperature range • High supply voltage rejection: – 80 dB typ. (at 25 °C) • Temperature range: 0 °C to 125 °C Description The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (VREF = 1.25 V). In fixed versions, the following output voltages are offered: 1.2 V, 1.8 V, and 3.3 V. The device is supplied in: SOT-223, DPAK and TO-220. Surface mounted packages optimize the thermal characteristics while offering a relevant space saving advantage. High efficiency is assured by an NPN pass transistor. Only a very common 10 µF minimum capacitor is needed for stability. Chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2% at 25 °C. TO-220 SOT-223 DPAK Table 1. Device summary Order codes Output voltage SOT-223 DPAK TO-220 LD1117AS12TR LD1117ADT12TR 1.2 V LD1117AS18TR LD1117ADT18TR 1.8 V LD1117AS33TR LD1117ADT33TR LD1117AV33 3.3 V LD1117ASTR LD1117ADT-TR Adjustable from 1.25 V www.st.com |
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