LT3973IMSE#PBF

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A PMIC is an integrated circuit designed specifically for power management in portable electronic devices. The addition of voltage regulators to the PMIC capabilities allows it to provide power control and switching functions while using minimal power, lowering system costs. As an example, the LT3973IMSE#PBF regulator is a member of the switching voltage regulator family of PMICs. It is specifically designed to meet the current needs of small form factor mobile devices such as tablets, smartphones, and wearable technology. This article will discuss the application fields and working principles of the LT3973IMSE#PBF.

Application Field of LT3973IMSE#PBF

The LT3973IMSE#PBF has a wide range of applications in mobile devices, including wearables, smart phones, tablets, and computing systems. It is designed to meet the needs of smaller form-factor devices, offering a maximum of four output voltage channels with a package size of less than 3 mm2. Its high integration and small size enable its use in high-end mobile devices and other demanding markets such as Power Ethernet, USB PD, and PoE.

In addition, the LT3973IMSE#PBF is also suitable for branch power management in systems such as LCD and OLED panel displays, used in a variety of electronic devices. The regulator can also be used in motor control applications, providing three output channels with wide voltage and current range. Moreover, the regulator has ULAC 65A certification, allowing it to be used in a medical environment.

Working Principle of LT3973IMSE#PBF

The LT3973IMSE#PBF is powered by an input voltage range is 2.4V to 6V. It can provide regulated outputs from 0.9V to 5.5V to multiple loads, with each output channel delivering up to 3A current. In order to provide this output power, the device utilizes a switching converter topology and an internal high-frequency switched-mode power supply.

The LT3973IMSE#PBF integrates two switches, an inductor, and three capacitors on its die. When the low side MOSFET is switched on, the input voltage is applied across the inductor, resulting in an electric field that builds up between its two ends. When the high side MOSFET is turned on, this electric field is driven into the output capacitor, providing the necessary output voltage.

The switching frequency of the LT3973IMSE#PBF is adjustable from 75kHz to 500kHz. This allows the output voltage to be accurately maintained across varying loads, avoiding any corrugations in the output waveform, and providing a fast response time to changing loads. Furthermore, in addition to its standard buck architecture, the device can also operate in a Hysteretic buck or a hysteretic boost mode.

Conclusion

The LT3973IMSE#PBF is a member of the switching voltage regulator family of PMICs. It is specifically designed to meet the current needs of small form factor mobile devices such as tablets, smartphones, and wearable technology. The device is powered by an input voltage range of 2.4V to 6V. It can provide regulated out

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