LD1117S12TR Power Mosfet Transistor Low Drop Fixed And Adjustable Positive Voltage Regulators

LD1117S12TR Power Mosfet Transistor Low Drop Fixed And Adjustable Positive Voltage Regulators

Feature summary

■ Low dropout voltage (1V TYP.)

■ 2.85V Device performances are suitable for SCSI-2 active termination

■ Output current up to 800 mA

■ Fixed output voltage of: 1.2V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V

■ Adjustable version availability (Vrel=1.25V)

■ Internal current and thermal limit

■ Available in ± 1% (at 25°C) and 2% in full temperature range

■ Supply voltage rejection: 75dB (typ.)

Description

The LD1117 is a LOW DROP Voltage Regulator able to provide up to 800mA 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, 3.0V 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, 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 10µF 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.

Absolute maximum ratings

Block diagram

Pin connections (top view)

Note: The TAB is connected to the V_OUT.