LM3670MF-1.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-1.5/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, designed for space-constrained applications. It operates with an input voltage range from 2.5 V to 5.5 V and provides a fixed output of 1.5 V at up to 350 mA. The device features automatic transition between Pulse Frequency Modulation (PFM) and Pulse Width Modulation (PWM) modes to optimize efficiency across varying load conditions. It utilizes a compact SOT-23-5 package and supports switching frequencies up to 1 MHz, ensuring stable performance within an operating temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automatic PFM/PWM mode switching for enhanced light-load efficiency
• Synchronous rectification architecture for improved power conversion
• Compact SOT-23-5 packaging suitable for space-limited designs

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring efficient power management
• Battery-powered devices needing extended operational life
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence when sourcing components. Confirm that the SOT-23-5 package variant matches your PCB footprint requirements. Ensure the fixed 1.5 V output specification aligns precisely with your target circuit design before procurement. Cross-reference the manufacturer's latest datasheet to validate any recent manufacturing changes or pinout updates.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5 V output is required without external feedback resistors. It is appropriate for designs prioritizing small form factors due to the SOT-23-5 package. Consider this part if automatic light-load efficiency improvement via PFM/PWM switching is necessary. Evaluate the 350 mA current limit against peak load demands to ensure adequate headroom for system operation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3670 series of mini SD DC-DC converters from Texas Instruments. The series includes adjustable variants like the LM3670MF-ADJ/NOPB and other fixed-output options. These converters are engineered for portable applications where size and efficiency are critical constraints. The family shares common synchronous buck topology principles optimized for low quiescent current operation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM3670MF-1.2/NOPB serves as a direct substitute if a 1.2 V output is acceptable instead of 1.5 V. Verify compatibility regarding output current capabilities and package dimensions. Ensure the replacement maintains the same input voltage range and switching frequency characteristics for seamless integration.