LP8725TLE/NOPB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Controller/Converter, Multimedia Processors
Voltage - Input:	2.6 V ~ 4.5 V
Number of Outputs:	9
Voltage - Output:	0.8 V ~ 3.3 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	30-WFBGA, DSBGA
Supplier Device Package:	30-DSBGA
Base Part Number:	LP8725

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LP8725TLE/NOPB Application Field and Working Principle

Introduction

The LP8725TLE/NOPB is an integrated power PMIC (Power Management Integrated Circuit) designed to manage power requirements in portable applications. It is manufactured and marketed by “Texas Instruments”. This device is designed to facilitate the design of portable systems including tablets, notebooks, ultrabooks, and netbooks that operate from multiple inputs, require multiple output power rails, and have the ability to operate in low power processing modes. The LP8725TLE/NOPB is a 8-channel, synchronous step-down converter integrated circuit (IC) that includes two-phase buck converters and six independent buck converters.

PMIC - Voltage Regulators - Special Purpose

The LP8725TLE/NOPB IC is classified as a PMIC (Power Management Integrated Circuit) and a special purpose voltage regulator. Its special purpose use is primarily as a current-mode buck converter providing an adjustable output voltage from an input voltage range of 2.5V to 5.5V. This current mode provides built-in safety against any over-current condition. It is a single-IC solution for supplying multiple power rails in portable applications.

Features

The LP8725TLE/NOPB includes a two-phase synchronous buck switching converter and six independent buck converters. It is capable of delivering up to 4A of adjustable output current and up to 27V of adjustable output voltage. It also has programmable OVP (Over Voltage Protection) and output current limit features. The device features an adjustable switching frequency of up to 2MHz, and programmable slew rate control. The LP8725TLE/NOPB offers low-power operation and its two-phase regulation provides less ripple and improved system performance. It also has power failure detection, power good detection, and a thermal shutdown protection feature.

Applications

The LP8725TLE/NOPB is designed for use in a wide range of portable applications such as tablets, notebooks, ultrabooks, and netbooks. It is ideal for portable systems that operate from multiple input sources, including battery inputs. It facilitates the design of portable systems, allowing them to operate in low power processing modes. Additionally, it can be used in devices requiring multiple output power rails and adjustable output voltage.

Working Principle

The LP8725TLE/NOPB is a high-efficiency, CMOS compatible, synchronous step-down converter IC. It uses a two-phase switching converter and six independent buck converters to provide adjustable output current and voltage to multiple output rails. It has two channels, labeled P1 and P2, which are each capable of providing up to 2 Amps of adjustable output current. Each channel has its own voltage-mode control that provides an adjustable output voltage from 2.5V to 5.5V.The current mode operation of the LP8725TLE/NOPB works by sensing the voltage drop across an external current-sense resistor, which sets the internal current limit of the converter. Internally, the feedback of P1 and P2 regulate their own output voltage levels. When the input voltage to either channel is greater than the output voltage, the internal power MOSFETs are switched on and current starts to flow to the output, decreasing the output voltage. When the input voltage is lower than the output voltage, the internal power MOSFETs are switched off, stopping the current flow and increasing the output voltage.The two-phase regulation of the LP8725TLE/NOPB allows for more efficient power conversion than a conventional buck regulator. By simultaneously switching two MOSFETs on and off, the ripple voltage is reduced, resulting in less noise and higher efficiency. Additionally, the LP8725TLE/NOPB has a programmable slew rate feature, allowing for easier adaptation to different load conditions. The slew rate can be programmed from 0.1 to 200mV/us.

Conclusion

The LP8725TLE/NOPB is an 8-channel, synchronous, CMOS compatible, step-down power PMIC (Power Management Integrated Circuit) designed for use in portable devices such as tablets, notebooks, ultrabooks, and netbooks. It features a two-phase buck converter and six independent buck converters, providing adjustable output current and voltage to multiple output rails. It has an adjustable switching frequency of up to 2MHz, programmable output voltage (2.5V to 5.5V) and current limit features, programmable slew rate, OVP protection, and thermal shutdown. This device is optimized for use in portable devices and applications requiring multiple output power rails and adjustable output voltage.

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