LD1117A Low drop fixed and adjustable positive voltage regulators Datasheet - production data Available in 2% (at 25 C) and 4% in full temperature range High supply voltage rejection: 80 dB typ. (at 25 C) SOT-223 Temperature range: 0 C to 125 C TO-220 Description The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (V = 1.25 V). In REF DPAK 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 Features characteristics while offering a relevant space Low dropout voltage: saving advantage. High efficiency is assured by an NPN pass transistor. Only a very common 10 1.15 V typ. I = 1 A, 25 C OUT F minimum capacitor is needed for stability. Chip Very low quiescent current: trimming allows the regulator to reach a very tight 5 mA typ. 25 C output voltage tolerance, within 2% at 25 C. Output current up to 1 A Fixed output voltage of: 1.2 V, 1.8 V, 3.3 V Adjustable version availability (V = 1.25 V) REF Internal current and thermal limit Only 10 F for stability 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 July 2013 DocID7194 Rev 26 1/24 This is information on a product in full production. www.st.comContents LD1117A Contents 1 Diagram . 3 2 Pin configuration . 4 3 Maximum ratings 5 4 Schematic application . 6 5 Electrical characteristics . 7 6 Typical application . 10 7 LD1117A adjustable: application note 12 8 Package mechanical data 13 9 Packaging mechanical data 19 10 Revision history . 23 2/24 DocID7194 Rev 26