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.

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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. From nothing, the publication has come into its own, as has its subscriber list. Many innovative circuits have seen the light of day in the pages of our now hallowed publication.

This Application Note is meant to consolidate the circuits from the first few years of the magazine in one place. Circuits herein range from laser diode driver circuits to data acquisition systems to a 50W high efficiency switcher circuit. Enough said. All other trademarks are the property of their respective owners. Application Note 58 September 5V to 3. These new processors require high current power at 3.

Special techniques are required to ensure proper operation of the microprocessor and good heat dissipation within the computer system. Table 1 shows the range of components available for linear regulation of 3. With only 1. Low dropout regulators are available delivering currents from mA to 7. The NPN structure requires about 1.

Because of this constant quiescent current, the …. SCSI-2 is a bidirectional bus, which must be terminated at both ends to 2. The terminators are needed because SCSI-2 uses simple open collector output drivers in its transceivers. When the load to the bus increases, the role of the termination network becomes more important for maintaining signal integrity at high data rates.

An active termination design is now a part of the SCSI-2 standard and is presented here in-depth. Any two devices can terminate the cable, but bit error rates are minimized with the terminators attached only at the ends. Local capacitive loading is low under these conditions, making the transmission line more consistent with fewer discontinuities. Computing rates, and in most cases, energy consumed by these circuits show a strong improvement over 5V technology.

The main power supply in most systems is still 5V, necessitating a local 5V to 3. Figure 1 shows a circuit that converts a 4. Unlike other linear regulators, the LT Small input and output capacitors facilitate …. In the past a processor swap was simply a matter of removing one IC and replacing it with an updated version. But now the upgrade path involves switching from a 5V chip to one that requires 3. One means of changing supply voltage from 5V to 3.

This is not a good solution since it leaves too much to chance. Failure to remove the jumper can result in the instant destruction of the new microprocessor upon application of power.

A means of automatically sensing the presence of a 3. Extract from the document. PDF , Kb , File published: Jan 1, This application note consolidates the circuits from the first few years of Linear Technology magazine into one publication. AN58 presents a collection of both linear and switching regulator solutions for conversion of 5V to 3.

Applications information and a comparison of various bypass capacitor types is included. Most of the designs can be easily modified for other intermediate voltages such as 3. Privacy Policy Change Privacy Settings. Linear Technology.


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LT1117-5 regulator. Datasheet pdf. Equivalent


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