LT1074 DATASHEET PDF

The switch output is specified to swing 40V below ground, allowing the LT to drive a tappedinductor in the buck mode with output currents up to 10A. Figure 2 feedback controls the basic circuit to regulate output voltage. In this case switch ontime e. When the switch closes the input voltage appears at the inductor. The capacitors accumulated charge has no discharge path, and a DC potential appears at the output. This DC potential is lower than the input because the inductor limits current during ….

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The switch output is specified to swing 40V below ground, allowing the LT to drive a tappedinductor in the buck mode with output currents up to 10A. Figure 2 feedback controls the basic circuit to regulate output voltage. In this case switch ontime e. When the switch closes the input voltage appears at the inductor. The capacitors accumulated charge has no discharge path, and a DC potential appears at the output. This DC potential is lower than the input because the inductor limits current during ….

The reasons for this are simple; heat and efficiency. Topological considerations also require switching technology. For instance, a battery cannot generate an output higher than itself with linear supplies. The availability of low cost rechargeable batteries has created a spectacular rise in the number of battery-powered systems, and consequently a matching rise in the use of switching regulators.

They are close to the ultimate …. The request may have customer origins or it may be an in-house requirement. Alternately, a circuit may be developed because its possibility is simply too attractive to ignore1. Over time, these circuits accumulate, encompassing a wide and useful body of proven capabilities. They also represent substantial effort. These considerations make publication an almost obligatory proposition and, as such, a group of circuits is presented here. This is not the first time we have displayed such wares and, given the encouraging reader response, it will not be the last2.

They appear at the next paragraph. Executions exist, but are often cumbersome, involving numerous components. The 5V output is capable of sourcing up to 5A of output current.

This device needs only a few external parts to make up a complete regulator including thermal protection and current limit. This design uses off-the-shelf parts for low cost and easy availability of components. Circuit Description Figure 1 shows the schematic of the circuit. This causes current to build up in the inductor. Preview and Download. Extract from the document. PDF , 6. Basic concepts and circuits are described along with more sophisticated applications.

Six appended sections cover LT circuitry detail, inductor and discrete component selection, current measuring techniques, efficiency considerations and other topics. These regulators are specifically designed for ease of use. This application note is intended to eliminate the most common errors that customers make when using switching regulators as well as offering insight into the inner workings of switching designs.

There is an entirely new treatment of inductor design based upon simple mathematical formulas that yield direct results. Additionally, many troubleshooting hints are included as well as oscilloscope techniques, soft-start architectures, and micropower shutdown and EMI suppression methods. PDF , 2. This application note compares the efficiency characteristics of some of the more popular types. Step-up, step-down, flyback, negative-to-positive, and positive-to-negative are shown.

Appended sections discuss how to select the proper aluminum electrolytic capacitor and explain power switch and output diode loss calculations. Five signal conditioners appear; a unique, single positive rail powered amplifier with output to and below zero volts, a milliohmmeter, a 0. Two appended sections consider measurement technique and connection practice in sub-nanosecond circuits.

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LT1074 Regulator. Datasheet pdf. Equivalent

Step-Down Switching. The power switch, all. The topology is a classic. The switch output is specified to swing 40V. The LT uses a true analog multiplier in the feedback. This makes the device respond nearly instanta-.

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