Description
The LD1117A is a LOW DROP Voltage Regulator able to provide up to 1A of Output Current, available even in adjustable version (Vref=1.25V). Concerning fixed versions, are offered the following Output Voltages: 1.2V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V. The 2.85V type is ideal for SCSI-2 lines active termination. The device is supplied in: SOT-223, DPAK, D2PAK/A and TO-220. Surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. Only a very common 10µF minimum capacitor is needed for stability. Only chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2% at 25°C.

FEATUREs
■ Low dropout voltage (1.15V typ. @ IOUT = 1A, 25°C)
■ Very low quiescent current (5 mA typ. @ 25°C)
■ Output current up to 1A
■ Fixed output voltage of: 1.2V, 1.8V, 2.5V, 2.85V, 3.3V, 5.0V
■ Adjustable version availability (Vrel = 1.25V)
■ 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: – 80dB typ. at 25°C)
■ Temperature range: 0°C to 125°C