LD1117S33TR 低压差稳压器

LD1117S33TR

Adjustable and fixed low drop positive voltage regulator

低压差稳压器 3.3V 0.8A Positive

Description LD1117S33TR

The LD1117S33TR 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.

Features LD1117S33TR

• 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.)