LT3080IST#PBF

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The LT3080IST#PBF is a current-mode synchronous step-down DC/DC converter circuit, part of the family of Low Dropout (LDO) or Linear voltage regulators by Linear Technology Corporation (LTC). It is built on a low dropout 100V process. Every application typically needs a voltage regulator that maintains or adjusts its output voltage reliably, regardless of changes in load or input voltage. This is typically achieved through a linear voltage regulator. The LT3080IST#PBF is particularly useful for low voltage applications, such as automotive and industrial control circuitry, microprocessor power supplies, cell-phones, battery chargers, data converters, and other telecom and portable applications that require a low quiescent current.

A linear voltage regulator is a two-terminal electrical component that maintains a constant output voltage by controlling the input voltage. This is usually achieved by pulling the output voltage down through an internal decrease in the voltage between its output and indicator terminals. Voltage regulators are constructed with a variety of configurations, defined by the type of power sources used and the type of load. These include series-pass and shunt-regulator types; these two share the same fundamental concept. The LT3080IST#PBF is a shunt-type linear regulator, particularly useful for applications that require a low quiescent current. It utilizes a simple, discrete control circuit to acomplish its tasks.

The LT3080IST#PBF is composed of several components. The inductor stores energy in a magnetic field in response to current changes. The output capacitance speed up the regulation process by maintaining a limited amount of energy in the low-impedance conductive path. The Schottky diode provides a low-resistance path to allow the current-mode loop to charge the inductor during the step-down process. And the internal MOSFET is the main switch, connecting or disconnecting the inductor from the input voltage source.

The LT3080IST#PBF is designed to provide regulated output with excellent line regulation, approximately one percent at up to 1A loads. It also has a very low quiescent current draw, only 0.90mA typical, making it particularly useful for low voltage and short on-time applications. It can operate from input supply voltages of 2.5V to 14V, and the output voltage can be adjusted with a single external resistor. Its switching frequency is also adjustable up to 2.5MHz and can be externally synchronized via an external resistor.

The LT3080IST#PBF also features integrated protection circuitry, including over temperature, output over-voltage and under-voltage protection. Output current limit protection is also integrated, eliminating the need for an external current sense resistor and extra BOM cost. It also features various power good, enable and inhibit features along with thermal shutdown protection.

In conclusion, the LT3080IST#PBF is an ideal voltage regulator solution for countless applications. Its low-dropout and low quiescent current make it perfect for automotive and industrial control circuitry, microprocessor power supplies, cell-phones, battery chargers, data converters, and other telecom and portable applications. Additionally, its integrated protection circuitry, power good, and enable/inhibit features ensure reliable operation in any conditions.

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