ST LD1117AS33TR

The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (V_REF = 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.

• Low dropout voltage: – 1.15 V typ. (ΔI_OUT = 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 (V_REF = 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