描述 Description

The LD1117A is a low drop voltage regulator able to provide up to 1 A 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 and 3.3 V. The device is supplied in: SOT-223, DPAK, D2PAK/A and TO-220. Surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. Only a very common 10 μF minimum capacitor is needed for stability. Only chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2 at 25 °C.

特性 Features

■ Low dropout voltage (1.15 V typ. @ IOUT = 1 A, 25 °C)

■ Very low quiescent current (5 mA typ. @ 25 °C)

■ Output current up to 1 A

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

■ Adjustable version availability (VREL = 1.25 V)

■ Internal current and thermal limit

■ Only 10 μF for stability

■ Available in ± 2 (at 25 °C) and 4 in full temperature range

■ High supply voltage rejection: – 80 dB typ. (at 25 °C)

■ Temperature range: 0 °C to 125 °C