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
| Symbol | Parameter | Value | Unit | |
| VIN | DC Input Voltage | 15 | V | |
| PTOT | Power Dissipation | 12 | W | |
| TSTG | Storage Temperature Range | -40 to +150 | °C | |
| TOP | Operating Junction Temperature Range | for C Version | -40 to +150 | °C | |
| for standard Version | 0 to +150 | °C | |
Block diagram
Pin connections (top view)
Note: The TAB is connected to the VOUT.
