TCR5AM12,LF

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TCR5AM12, LF application field and working principle

Introduction: TCR5AM12, LF is a type of low dropout, low noise, single-channel linear voltage regulator integrated circuit, designed by Texas Instruments. According to its data sheet, this voltage regulator has very low quiescent current and pretty high output efficiency. It’s widely applicable in satellite systems, wireless systems, medical equipment and many other low-voltage, low-power applications which require extremely low quiescent current.

Application field:

The primary application field of TCR5AM12, LF linear voltage regulator is to provide the required voltage supply to various circuits providing it the necessary protection from over-voltage and over-current, resulting in a stable voltage output that is independent from the input. The output ripple voltage, which is the voltage changing included in the output of the regulator, will vary depending on the type of regulator used.

TCR5AM12, LF linear voltage regulator can be used as an output post-regulator in microprocessor, memory and peripheral circuits or as an input to higher-voltage DC/DC switches. Its extremely low standby current makes it capable of providing an extremely low-power standby state. A popular application of TCR5AM12, LF is using it as a power supply and a regulator in a wide variety of industrial, medical and consumer electronic products such as DVD players, laptop computers, flat-panel displays, multi-function printers, smart phones, tablets etc.

Working principle:

The linear voltage regulator is a simple and easy to use voltage regulator integrated circuit. It takes the input voltage from a power source, like a battery and regulates it by maintaining a constant output voltage. This is accomplished by monitoring the input voltage and controlling the output voltage using the onboard comparator. The current then flows through the resistor network and goes to the voltage regulator circuit. This circuit is usually connected to the same voltage source and acts like a current sink by diverting some of the current when the input voltage exceeds the set point.

The TCR5AM12, LF linear voltage regulator features a very low quiescent current and can maintain a very stable output voltage over a wide temperature range. It includes an Error Amplifier that amplifies any difference between the output and reference voltage. The voltage regulation is obtained by controlling the gate voltage of a transistor connected between the input voltage and the output voltage. An internal compensation network along with a feedback resistor is used to set the reference voltage and the resistance value of a given load. When the load is higher than expected, the input signal will be relatively larger which will increase the voltage at the output.

Conclusion:

TCR5AM12, LF is a low dropout, low noise, single-channel linear voltage regulator. It’s widely applicable in satellite systems, wireless systems, medical equipment and many other low-voltage, low-power applications. It’s especially suitable for applications that require an extremely low quiescent current. It operates by monitoring the input voltage and controlling the output voltage using the onboard comparator. The Error Amplifier amplifies any difference between the output and reference voltage and the voltage regulation is obtained by controlling the gate voltage of a transistor connected between the input voltage and the output voltage.

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