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The SA1117B is a positive low voltage dropout regulator; typical voltage dropout is only 1.2V at 1A.

SA1117B provides two versions: fixed and adjustable versions. VOUT has a tolerance of less than 1.5% for fixed versions 1.2V 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version or 2% output accuracy for fixed version 1.2V.

The SA1117B offers some key features include thermal shutdown and current limiting. It is suitable for all electronic products.


Main feature
  • 1.5% output accuracy for fixed versions 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version

  • Adjustable output voltage

  • Low Dropout Voltage: Typical 1.2V@1A

  • Current Limiting

  • Thermal Shutdown

  • Temperature Range: -40°C to 125°C


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SA1117BH-ADJTR SOT-223-3L SA1117BH-ADJ Halogen free Tape & Reel
SA1117BH-1.2TR SOT-223-3L SA1117BH-1.2 Halogen free Tape & Reel
SA1117BH-1.5TR SOT-223-3L SA1117BH-1.5 Halogen free Tape & Reel
SA1117BH-1.8TR SOT-223-3L SA1117BH-1.8 Halogen free Tape & Reel
SA1117BH-2.5TR SOT-223-3L SA1117BH-2.5 Halogen free Tape & Reel
SA1117BH-3.3TR SOT-223-3L SA1117BH-3.3 Halogen free Tape & Reel
SA1117BH-5.0TR SOT-223-3L SA1117BH-5.0 Halogen free Tape & Reel
SA1117BD-ADJTR TO-252-2L SA1117BD-ADJ Halogen free Tape & Reel
SA1117BD-1.2TR TO-252-2L SA1117BD-1.2 Halogen free Tape & Reel
SA1117BD-1.5TR TO-252-2L SA1117BD-1.5 Halogen free Tape & Reel
SA1117BD-1.8TR TO-252-2L SA1117BD-1.8 Halogen free Tape & Reel
SA1117BD-2.5TR TO-252-2L SA1117BD-2.5 Halogen free Tape & Reel
SA1117BD-3.3TR TO-252-2L SA1117BD-3.3 Halogen free Tape & Reel
SA1117BD-5.0TR TO-252-2L SA1117BD-5.0 Halogen free Tape & Reel
SA1117BR-ADJTR SOT-89-3L BAJR Halogen free Tape & Reel
SA1117BR-1.2TR SOT-89-3L B12R Halogen free Tape & Reel
SA1117BR-1.5TR SOT-89-3L B15R Halogen free Tape & Reel
SA1117BR-1.8TR SOT-89-3L B18R Halogen free Tape & Reel
SA1117BR-2.5TR SOT-89-3L B25R Halogen free Tape & Reel
SA1117BR-3.3TR SOT-89-3L B33R Halogen free Tape & Reel
SA1117BR-5.0TR SOT-89-3L B50R Halogen free Tape & Reel
Block Diagram

1117B.png