LM3671LC-1.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671LC-1.3 is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for portable applications. It operates with an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.3 V at a maximum load current of 600 mA. The device utilizes a 2 MHz switching frequency, enabling the use of compact external components. It features automatic transition between PWM low-noise mode and PFM low-current mode to optimize efficiency across varying load conditions. The component is housed in a DSBGA-5 package and supports an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automatic intelligent switching between PWM low-noise mode and PFM low-current mode for optimized system control and battery life extension.
• Internal synchronous rectification ensures high energy efficiency during PWM mode operation.
• High 2 MHz switching frequency allows for the use of miniature surface-mount inductors and capacitors.
• Integrated shutdown function reduces battery drain to typical 0.01 µA when disabled.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion batteries
• Mobile phone power management systems
• Portable consumer electronics requiring compact form factors

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'LC' indicates the DSBGA-5 package variant distinct from SOT-23-5 versions. Confirm RoHS compliance status via the manufacturer datasheet. Ensure the fixed 1.3 V output aligns with target circuit requirements as adjustable variants exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 1.3 V rail is required within a 2.7 V to 5.5 V input window. The DSBGA-5 package offers a smaller footprint compared to SOT-23-5 alternatives. Consider the 600 mA current limit for load demands and verify thermal performance under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM3671 family of 2 MHz, 600 mA step-down converters. The 'LC' designation specifically identifies the DSBGA-5 package version, differentiating it from other pinout or footprint options like SOT-23-5 or USON found in the broader series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.3/NOPB (SOT-23-5 package equivalent)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the difference between the LM3671LC and LM3671MF packages?

The LM3671LC uses a DSBGA-5 package, while the LM3671MF uses an SOT-23-5 package. Both offer identical electrical characteristics but differ in physical footprint and mounting style.

Does the LM3671LC-1.3 support adjustable output voltage?

No, the '-1.3' suffix indicates a fixed 1.3 V output. Adjustable versions are available with the '-ADJ' suffix in the LM3671 family.