LP5952LC-1.2

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LP5952LC-1.2 is an adjustable, low-dropout linear regulator designed specifically to power portable and wearable products like smartphones and smartwatches. It is part of the PMIC range of voltage regulator, DC/DC convertors, controllers, and load switches and falls under the linear regulators.

This ultra-low quiescent current regulator has an adjustable output with a range of 1.2V to 5.0V and can supply an impressive current of 1.5A. It boosts the system stability and accuracy with the Thermally Enhanced Transistor (TET) and the advanced dynamic voltage drop compensation (DVLC) feature which allows for voltage trimming to enhance power efficiency.

LP5952LC-1.2 also offers a unique power sequence and protection feature which monitors the battery voltage providing an accurate Current Limited and Thermal Foldback for protecting a system during battery brown-out conditions. It also has an over-temperature protection with a 60°C self-resettable latch function.

The LP5952LC-1.2 is designed with low losses to sustain a high efficiency and a very high power density. It uses a wide VIN range of 4.2V to 5.5V and achieves up to 95% efficiency with a very low dropout of just 80mV @1A. It also features low battery quiescent current of 8uA, enabling operations in low-power battery level conditions such as with a 200mAh battery.

LP5952LC-1.2 application field opportunities are extremely diverse. It’s used in wide-ranging industrial products and consumer wearables such as portable medical devices, smart home appliances, health and fitness wearables and smartwatches. Its performance and high efficiency able it to operate in solar-powered and light dependent applications.

To understand how a linear regulator works, one must first understand the basic block diagram of a voltage regulator. It consists of an error amplifier, a voltage reference, and a pass element which is usually a transistor that regulates the output voltage. The basic function of linear regulators is to compare the input voltage and the reference voltage. The difference between the two voltages is then amplified by the error amplifier output and passed onto the pass element.

The control loop within the linear regulator circuit is such that the feedback from the output voltage from the pass element is compared to the reference voltage by the error amplifier. Then, the output from the amplifier is passed on to the pass element within the regulator. This causes the output voltage from the element to shift in the direction of adjustment until the feedback is equal to the reference voltage. This will ultimately provide the voltage regulation which is required of linear regulators.

In the case of the LP5952LC-1.2, the Thermally Enhanced Transistor (TET) and the advanced dynamic voltage drop compensation (DVLC) feature, help control and stabilize the output voltage. The TET technology allows for a larger input voltage with less drop-out making it ideal for dynamic voltage drop applications. The DVLC also features advanced trimming which allows for voltage adjustability. All of this helps to make the LP5952LC-1.2 an efficient and very reliable linear regulator.

In summary, the LP5952LC-1.2 is an adjustable, low-dropout, linear regulator that features an impressive current of 1.5A with a very low dropout voltage of only 80mV @1A. It offers a unique power sequence and protection feature which monitors the battery voltage providing an accurate Current Limited and Thermal Foldback for protecting a system during battery brown-out conditions. It is designed with low losses to sustain a high efficiency and a very high power density, making it ideal for wide range of applications from industrial products to consumer wearables. By understanding the basic functionality of a linear regulator, the capabilities and features of the LP5952LC-1.2 for providing precise voltage trimming and boost stability can be fully appreciated.

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