The LT is a positive low dropout regulator designed to provide up to mA of output current. The device is available in an adjustable version and fixed output voltages of 2. The 2. All internal circuitry is designed to operate down to 1V input to output differential. Dropout voltage is guaranteed at a maximum of 1. Current limit is also trimmed in order to minimize the stress on both the regulator and the power source circuitry under overload conditions.

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Based on the version of the IC the output voltage can vary between fixed voltages like 1. There are many types of LD, the fixed types provide a fixed output voltage of 1. It is very similar to the LM but the LD ha very low voltage drop making it suitable for battery operated applications. So if you are looking for a SMD component voltage regulator with low voltage drop then this IC might be the right choice for you.

The LD Output voltage will differ based on its part number. Also the IC is available in four different packages. The following table will be useful to select the suitable IC with correct voltage rating and package type.

Using the LD is pretty much straight forward. If it a fixed voltage regulator just power the IC though the Vin pin and the regulated output can be obtained in the Vout pin. Also a capacitor can be added at the output side to filter out the noise. For an Adjustable type voltage regulator we need two external resistors to decide the output voltage of the Regulator. A reference circuit diagram is shown below, where the resistors R1 and R2 decides the output voltage of the regulator.

The capacitor CAdj is an optional component which can be added to improve ripple rejection if required. The other two capacitors are to filter the input and output noise respectively.

The application circuit and other important parameters can be referred from the datasheet linked below. Subscribe to stay updated with industry's latest Electronics components and news. Output Voltage: 1. Applications Used for Positive voltage regulations Battery Operated applications. Component Datasheet. LD Regulator Datasheet. Tags Variable Voltage Regulator. Get Our Weekly Newsletter!


0.8A(Io)/1.1V(Vd) Low Dropout Linear Voltage Regulator, ADJ, 1.8V, 2.5V, 2.85V, 3V, 3.3V, 3.6V, 5V



LD1117 Datasheet


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