LM3691TLX-2.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3691TLX-2.5/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, designed for portable applications. It operates with an input voltage range of 2.3 V to 5.5 V and delivers a fixed output voltage of 2.5 V at up to 1 A output current. The device utilizes a high switching frequency of 4 MHz, enabling the use of small external components. It is housed in a compact 6-pin DSBGA (YZR) package. The operational temperature range extends from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture for improved efficiency
• High switching frequency allows for miniature passive component selection
• Fixed internal feedback network provides precise output regulation

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded digital logic circuits needing stable 2.5 V supply rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix '2.5' confirms the fixed 2.5 V output voltage, as other variants exist within the LM3691 family. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance. Ensure the DSBGA-6 package footprint matches the target PCB design constraints. Check current availability status as this specific part number may have limited stock or end-of-life implications depending on the distributor.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 2.5 V output is required without external resistor dividers. The 4 MHz switching frequency is suitable for space-constrained designs where small inductors and capacitors are necessary. Ensure the input voltage source remains within the 2.3 V to 5.5 V window. Consider the thermal performance of the DSBGA package under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3691 series of high-accuracy, miniature step-down converters. It shares the same core topology and packaging as variants like the LM3691TLX-0.75/NOPB and LM3691TLX-1.0/NOPB, differing primarily in the fixed output voltage setting. The series is targeted at mobile and handheld equipment where board area and battery life are critical design parameters.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible substitutes include other LM3691 variants such as LM3691TLX-0.75/NOPB or LM3691TLX-1.0/NOPB if the system can accommodate different fixed output voltages. Verify that any replacement maintains the 4 MHz switching frequency and 1 A current capability.