LP3907SQ-PXPP/NOPB

Overview

The LP3907SQ-PXPP/NOPB is a specialized power management integrated circuit (PMIC) manufactured by Texas Instruments, originally developed under the National Semiconductor brand. This device integrates two high-current synchronous step-down DC/DC converters and two low-dropout (LDO) linear regulators within a single package. The switching regulators provide output currents of 1A and 600mA respectively, while the LDOs deliver 300mA each. It features an I2C-compatible interface for programmable control and monitoring. The component operates within an input voltage range of 2.8V to 5.5V and supports a switching frequency of 2.1MHz. It is housed in a 24-WQFN package with dimensions of 4mm x 4mm and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates dual high-current synchronous buck converters and dual LDOs for comprehensive power rail generation.
• Features an I2C-compatible serial interface allowing for dynamic configuration and real-time status monitoring.
• Supports independent enable controls for all four outputs to facilitate precise power sequencing.
• Includes built-in protection mechanisms such as thermal shutdown and current limiting for system reliability.

Applications

• Advanced application processors requiring multiple regulated voltage rails.
• Field-Programmable Gate Array (FPGA) core and I/O power distribution.
• Portable electronic devices utilizing multi-rail power architectures.

Procurement Notes

Verify the manufacturer designation carefully, as the LP3907 series was transferred from National Semiconductor to Texas Instruments. Ensure the specific suffix matches the required pinout and thermal characteristics. Confirm that the I2C address settings align with your system bus requirements. Check for RoHS compliance documentation corresponding to the specific production batch. Validate the operating temperature range against your environmental specifications.

Selection Notes

Select this component when a compact solution is needed to replace multiple discrete regulators. It is suitable for designs requiring synchronized switching to minimize electromagnetic interference. Consider the 24-WQFN package size constraints during PCB layout. Evaluate the total quiescent current consumption against battery life requirements. Ensure the I2C bus speed compatibility with the host controller is maintained.

Part Context

This part belongs to the LP3907 family of mixed-signal PMICs designed for portable applications. It succeeded earlier National Semiconductor designs after the acquisition by Texas Instruments. The series is characterized by its integration of both switching and linear regulation technologies. It targets markets demanding high efficiency and small form factors. The device represents a transition point in TI's portfolio of advanced power management solutions.

Replacement Considerations

• LP3907SQ-PJXIX/NOPB
• LP3907SQ-PFX6W/NOPB

FAQ

What is the maximum switching frequency of the DC/DC converters?

The internal oscillators for the step-down converters operate at a fixed frequency of 2.1MHz.

Does the device support independent control of each regulator?

Yes, each of the two buck converters and two LDOs has a dedicated enable pin for independent activation.

What is the input voltage range for the LP3907SQ-PXPP/NOPB?

The device accepts an input supply voltage ranging from 2.8V to 5.5V.