LM4040C20ILPR

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Power management IC (PMIC) is an integrated circuit designed to minimize the time and effort needed to manage the current and voltage needs of a system. Voltage reference is one type of PMIC that provides a fixed voltage with a resistor divider network. The LM4040C20ILPR is one such voltage reference from National Semiconductor that is combined with design tools and applications to make it user friendly.The LM4040C20ILPR is an adjustable precision current shunt regulator with a wide operating temperature range which is suitable for a variety of applications. It offers an output voltage range of 0.6 V to 20 V and a typ. current of 200 Ipp for low power consumption and low noise operation. The voltage reference provides an accurate voltage reference point for controlling a supply voltage or current that is optimal for applications such as automotive, industrial, and communications. It also has a band gap reference and a 2.5V to 6.5V input voltage range.

In terms of application field, the LM4040C20ILPR can be used in AC or DC voltage references, battery monitoring, power supply sequencing, RS 232 data receivers and phase lock loop voltage references. It can also be used for current limit reporting, monitoring of power line voltages, measurement of digital power supplies, temperature compensated measurements and more. The on-chip temperature sensor, the integrated bandgap reference, and the large range of supply voltage inputs makes it particularly suitable for battery-operated applications.

The LM4040C20ILPR has very good thermal regulation and is designed to operate over a wide temperature range of -40℃ to 125℃. Additionally, it reduces electrolytic capacitor problems by providing a spread spectrum of switching frequencies. This ensures that the device will remain in operation even in unstable power supply or noisy environments. The typical power requirements are 200 μA at 4.75V supply voltage and the maximum shut down current is 1μA at 0V supply which makes it ideal for low power applications.

The LM4040C20ILPR works by using a bandgap reference output current that is set by an external resistor connected between the REFx and GND1 terminals. The resistor provides a nominal value for the output current and this current is then amplified and regulated internally by the voltage reference. The amplifier then senses any deviation from the set output current and adjusts the output voltage accordingly to maintain the required output current. The constant voltage reference ensures that the voltage is maintained accurately despite any deviation from the output current.

The LM4040C20ILPR is a versatile and highly efficient precision current shunt regulator with a wide operating temperature range which is suitable for a variety of applications. It offers an output voltage range of 0.6 V to 20 V, a typ current of 200 Ipp, a 2.5V to 6.5V input voltage range and an on-chip temperature sensor. It is ideal for applications such as automotive, industrial, and communications and can be used in technologies such as AC or DC voltage references, battery monitoring, power supply sequencing, RS 232 data receivers and phase lock loop voltage references. The LM4040C20ILPR provides an excellent combination of design tools, applications, and reliable outputs for all kinds of applications.

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