LM1117SX-3.3/NOPB

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LM1117SX-3.3/NOPB Application Field and Working Principle

One of the products of the Texas Instruments\' Power Management Integrated Circuits (PMIC) line is the LM1117SX-3.3/NOPB. This voltage regulator is a three-terminal regulator which, like other regulators, helps limit and stabilize the output voltage and current of an electrical circuit. This regulator is classified as a linear voltage regulator; to that end, it is in a category of PMICs known as Voltage Regulators - Linear.

The LM1117SX-3.3/NOPB is a low-dropout (LDO) regulator that has a 2.5V to 11V wide input voltage range. This regulator is efficient and reliable for a range of applications in industrial, telecommunications or consumer electronics industries. Typical applications for the LM1117SX-3.3/NOPB include DC-DC converters, microprocessor systems and sensitive electronics.

The LM1117SX-3.3/NOPB circuit includes a micro-power voltage reference and an error amplifier, a MOSFET pass transistor, and a current-limit circuit for thermally protected overload protection. Its maximum output current capacity is 1.5A and its external components are also small and inexpensive. The regulator comes in a thermally enhanced Small Outline Transistor (SOT-89) package which allows the circuit to dissipate heat more effectively and in turn enables the LM1117SX-3.3/NOPB to operate under higher load currents.

The output of the LM1117SX-3.3/NOPB is precisely regulated to 3.3 volts ±1%, making it ideal for power saving applications. As with all linear voltage regulators, the LM1117SX-3.3/NOPB can be used to power low-powered devices such as op-amps, comparators and digital logic supplied from a single supply. The stability of the LM1117SX-3.3/NOPB regulator is further enhanced by the internal current limit and thermal shutdown feature. This prevents the circuit from being damaged should it be exposed to too much currentdraw or too much heat. It also includes a soft-start feature which prevents inrush currents from damaging external components.

The LM1117SX-3.3/NOPB regulator is an ideal choice when precise, low-cost and low-noise voltage regulation is required. As its maximum dropout voltage is only 0.6V, it is ideal for low input voltage applications compared to other linear regulators. In addition, its low quiescent current (5mA) and low sleep mode current (0.6mA) make it an ideal choice for circuits operating in power-constrained environments. Combined with its thermal protection feature, the LM1117SX-3.3/NOPB offers reliable and cost-effective voltage regulation.

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