LP2985AIBP-2.4

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LP2985AIBP-2.4 is ·a linear voltage regulator PMIC (power management integrated circuit) that is widely used in various applications. Being a monolithic integrated circuit, it provides adjustable current limiting and thermal shutdown protection to supply output voltages with small drop out voltage even at extremely small input sources. This PMIC belongs to the family of Linear Voltage Regulators and its primary application fields include communication equipment, automotive accessories, medical devices and embedded systems.

The LP2985AIBP-2.4 provides an integrated solution for both permanent and transient over-current situations. The integrated current limiting is adjustable with an external resistor and will respond to an increasing load current for up to 25μs. This allows the PMIC to provide output voltages independent of an external IC being employed for current limiting.

To ensure safe operation and prevention of over-heating, it also has integrated Thermal Shutdown which senses the junction temperature and deactivate the output voltage when the temperature exceeds the selected limit.

This PMIC also has an integrated frequency compensation circuit that requires no external components. This allows for a smaller size, fewer parts, and reduced cost for the overall design. An additional feature of the LP2985AIBP-2.4 is the low dropout voltage (LDO) regulator which helps to ensure that the output voltage remains stable even at extremely low input sources.

In terms of its working principle, the LP2985AIBP-2.4 consists of four major components: a reference voltage regulator, an error amplifier, a voltage feedback network, and output MOSFET. The reference voltage regulator is a bandgap reference that provides the set point voltage for the error amplifier which is a comparator circuit. It compares the output voltage to the bandgap reference voltage and produces an error voltage that is used to regulate the current flowing into the output MOSFET. The output MOSFET provides the current to the load. The voltage feedback network is a voltage divider that provides the feedback voltage that is compared with the reference voltage to ensure accuracy and keep the output voltage stable.

The voltage regulator also has an adjustable current limit and a thermal shutdow feature. The adjustable current limit ensures that the device does not draw more current than is specified and the thermal shutdow avoids over-heating. The overall working principle of the LP2985AIBP-2.4 is simple and efficient and it is suitable for many applications.

To sum up, the LP2985AIBP-2.4 is an linear voltage regulator PMIC and its application field includes communication equipment, automotive accessories, medical devices and embedded systems. This PMIC is equipped with a reference voltage regulator, an error amplifier, a voltage feedback network, an output MOSFET, an adjustable current limiting, and a thermal shutdow circuit. All of these components enable the PMIC to provide output voltages with small dropout even with extremely small input sources. The working principle of the LP2985AIBP-2.4 is simple and efficient and it is suitable for many applications.

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