LM285D-1.2R2

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PMIC (Power Management Integrated Circuit) devices are essential components in electric power management, assisting the efficient and controlled delivery of energy to other components in a system. Voltage References are one of the key components within PMICs, providing reliable output signals for other components to respond and operate with. The LM285D-1.2R2 (Low Dropout Scriptable Voltage Reference) is a device used to reference exact voltage values to other components, providing a highly accurate and reliable output reference. This article describes the the application fields and working principle of the LM285D-1.2R2.

Application Fields

The LM285D-1.2R2 is a versatile and low-cost voltage reference IC. It is designed to provide a highly-stable output reference voltage of a fixed magnitude at any (positive or negative) specified level. It is ideal for battery-powered applications in which input voltages down to 100mV above the specified output voltage are necessary. It can be used as a reference for circuits that require constant transistor bias, and can provide current to multiple motors when used with an external amplifier.

The wide range of features of the LM285D-1.2R2 makes it ideal for applications such as embedded controllers and variable waveform generators, as well as being suitable for use in systems with non-standard operating voltages. It can also be used in precision resistors, step-down voltage regulators and temperature sensing.

The LM285D-1.2R2 is suitable for any application that needs highly accurate and stable reference voltages and very low power consumption.

Operating Principle

The LM285D-1.2R2 is a two pin device. Its main function is to provide a stable and accurate reference voltage via a 2-pin connection. Its precise voltage output is set with an external trimmer, offering non-volatile capacity, low power consumption and flexibility in the design. It is supplied with an 8-bit programmed I²C interface for monitoring, setting and suppressing the output voltage.

Internally the device is based on a bandgap reference circuit and has a supply voltage range of 2.7V to 10V. This voltage range allows the device to be used in a variety of conditions without compromising accuracy. Its on-chip comparator is able to monitor and adjust the reference voltage, further contributing to its accuracy. The output voltage is also temperature compensated to ensure a stable output.

The device also features internal kick-start and memory backup logic, allowing it to recover voltage outputs very quickly after a power cycle. This makes it the ideal choice for applications that require fast recovery times and numerous power cycles.

Conclusion

The LM285D-1.2R2 is a low-power and cost-effective voltage reference IC with a wide-variety of features. It can be used to provide a stable and accurate reference voltage in embedded applications such as variable waveform generators and to provide the necessary current to multiple motors in the absence of an external amplifier. With its internal kickstart and backup logic, it is the perfect device for applications that require multiple power cycles.

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