LD1117 Adjustable and fixed low drop positive voltage regulator Datasheet - production data flows mostly into the load. Only a very common 10 F 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 DPAK compatible with the other standard. Adjustable voltage regulators maintaining the better TO-220 performances in terms of drop and tolerance. SO-8 SOT-223 Features Low dropout voltage (1 V typ.) 2.85 V device performances are suitable for SCSI-2 active termination Output current up to 800 mA Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V Adjustable version availability (V = 1.25 V) REF Internal current and thermal limit Available in 1 % (at 25 C) and 2 % in full temperature range Supply voltage rejection: 75 dB (typ.) Description The LD1117 is a low drop voltage regulator able to provide up to 800 mA of output current, available even in adjustable version (V = REF 1.25 V). Concerning fixed versions, are offered the following output voltages: 1.2 V, 1.8 V, 2.5 V, 2.85 V, 3.3 V and 5.0 V. 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 November 2013 DocID2572 Rev 33 1/44 This is information on a product in full production. www.st.com 44Contents LD1117 Contents 1 Diagram . 5 2 Pin configuration . 6 3 Maximum ratings 7 4 Schematic application . 8 5 Electrical characteristics . 9 6 Typical application . 21 7 LD1117 adjustable: application note . 24 8 Package mechanical data 25 9 Packing mechanical data 36 10 Order codes . 42 11 Revision history . 43 2/44 DocID2572 Rev 33