LM3671LC-1.6

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671LC-1.6 is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for portable systems powered by single lithium-ion batteries. It operates within an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.6 V at a maximum load current of 600 mA. The device utilizes a synchronous buck topology with a typical switching frequency of 2 MHz. It features automatic transition between PWM low-noise mode and PFM low-current mode, reducing quiescent current to 16 µA in light-load conditions. The component is available in DSBGA-5 packaging and supports an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent mode switching between PWM and PFM for optimized efficiency across varying load conditions
• Internal synchronous rectification ensures high energy conversion efficiency during operation
• Compact design requiring only three external surface-mount components for implementation

Voltage Regulators - DC DC Switching Regulators Applications

• Power supply circuits for mobile phones and similar portable electronic devices
• Low-voltage circuit power delivery from single-cell lithium-ion battery sources
• Embedded systems requiring efficient step-down conversion from 2.7V to 5.5V rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'LC' against the manufacturer's official datasheet to confirm package type and pinout compatibility. Ensure the fixed 1.6 V output requirement matches the target application design constraints before procurement. Cross-reference the ordering part number with the latest revision history to avoid obsolete or discontinued variants.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.6 V output is required without external feedback resistors. It is suitable for applications prioritizing small footprint due to the DSBGA-5 package. Consider the 2 MHz switching frequency for minimizing passive component size. Verify that the 600 mA current limit meets the peak load demands of the downstream circuitry.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3671 family of 2 MHz, 600 mA step-down converters. The family offers various fixed voltage options and adjustable versions to suit different portable system requirements. The LM3671LC variant specifically denotes the DSBGA-5 package configuration, distinguishing it from SOT-23-5 or USON alternatives within the same functional series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671LC-1.6/NOPB: Lead-free version of the same specification.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM3671LC-1.6 support adjustable output voltage?

No, the LM3671LC-1.6 has a fixed output voltage of 1.6 V. Adjustable versions are available under different suffixes in the LM3671 family.

What is the typical quiescent current in light-load conditions?

The device reduces its quiescent current to 16 µA (typical) when operating in PFM mode during light-load or standby conditions.