Description:

The LD1117 is a low drop voltage regulator ableto provide up to 800 mA of output current,available even in adjustable version (VREF =1.25 V). Concerning fixed versions, are offeredthe 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 SOT223 and DPAK surface mount packages optimizethe thermal characteristics even offering arelevant space saving effect. High efficiency isassured by NPN pass transistor. In fact in thiscase, unlike than PNP one, the quiescent current flows mostly into the load. Only a very common10 µF minimum capacitor is needed for stability.On chip trimming allows the regulator to reach avery tight output voltage tolerance, within ± 1 % at25 °C. The adjustable LD1117 is pin to pincompatible with the other standard. Adjustablevoltage regulators maintaining the betterperformances in terms of drop and tolerance.

Features:

• Low dropout voltage (1 V typ.)

• 2.85 V device performances are suitable forSCSI-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 fulltemperature range

• Supply voltage rejection: 75 dB (typ.)