STMicroelectronics LD1117S50TR

LD1117S50TR Description
The LD1117 is a low drop voltage regulator able to provide up to 800 mA of output current, available even in adjustable version (VREF = 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 flows mostly into the load. Only a very common 10 μF 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 compatible with the other standard. Adjustable voltage regulators maintaining the better performances in terms of drop and tolerance.

LD1117S50TR 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 (VREF = 1.25 V)
Internal current and thermal limit
Available in ±1% (at 25 °C) and 2 % in full temperature range
Supply voltage rejection: 75 dB (typ.)


LD1117S50TR Applications
Negative supply
Circuit for increasing output voltage
Voltage regulator with reference
Battery backed-up regulated supply
Post-regulated dual supply
5G Communication
Electrification of automobile
Industrial 4.0