LT1171IQ#TRPBF

LT1171IQ#TRPBF Application Field and Working Principle

The linear LT1171IQ#TRPBF is a low-cost,regulated,monolithic high input voltage DC-DC converter for applications including direct battery charging and battery-powered systems.The device is designed for a 3V to 48V input voltage range and a 1.2V to 18V adjustable output voltage.The LT1171IQ#TRPBF can be operated from the input power source of base station,medical equipment,mobile equipment,internet of things devices and more.The LT1171IQ#TRPBF features a programmable output voltage range of 0.6V up to 18V, excellent transient response,and extensive protection features.

Working Principle

The LT1171IQ#TRPBF is primarily a Digitally Controlled Potentiometer (DCP) that is used to adjust the output voltage by setting the appropriate reference voltage. The output voltage is adjustable within the range specified. The key component of the DCP is a 5 bit digital potentiometer that controls the output voltage. The DCP is controlled by a control logic circuit, which is programmed by a digital command line interface.

The DCP on the LT1171IQ#TRPBFis implemented using discrete resistive elements in combination with a voltage reference. The resistive elements are typically transistors or polysilicon or metal-oxide field-effect transistors (MOSFETs). The output voltage is controlled by selecting different combinations of the resistive elements. The voltage reference is used to measure the output voltage and provide a reference voltage to the DCP.

The output current of the LT1171IQ#TRPBF is limited to 1A. It employs current limit protection (CLP), over voltage protection (OVP) and over temperature protection (OTP) features to protect the device from damage due to excessive load conditions.

Conclusion

The LT1171IQ#TRPBF is a low-cost monolithic 3V to 48V input range DC-DC converter with an adjustable output voltage range of 1.2V to 18V.It features programmable output voltage,excellent transient response,and extensive protection features. It is ideal for applications such as direct battery charging and battery-powered systems.