LM3670MF-1.6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-1.6/NOPB is a miniature synchronous step-down DC-DC converter manufactured by Texas Instruments, originally developed by National Semiconductor. It operates with an input voltage range of 2.7 V to 5.5 V and provides a fixed output of 1.6 V at up to 750 mA. The device utilizes a 1.3 MHz switching frequency and is housed in a compact SOT-23-5 package. Designed for ultra-low voltage applications, it features high efficiency to extend battery life in portable electronics.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology ensures high conversion efficiency for portable systems
• Compact SOT-23-5 package minimizes printed circuit board area requirements
• Integrated shutdown mode reduces quiescent current for extended standby operation

Voltage Regulators - DC DC Switching Regulators Applications

• Wireless mobile phones
• Digital cameras
• MP3 players
• Personal digital assistants (PDAs)
• Hard disk drives

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation as Texas Instruments on official datasheets, reflecting the acquisition of National Semiconductor. Confirm the suffix /NOPB indicates lead-free and RoHS compliance. Ensure the specific fixed output voltage variant matches the design requirement, as the LM3670 series includes adjustable and other fixed voltage options.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for space-constrained designs requiring efficient power management from single-cell lithium-ion or nickel-based batteries. The fixed 1.6 V output suits logic circuits and peripherals operating at this specific rail. Consider the 1.3 MHz frequency for balancing external component size against electromagnetic interference constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3670 family of miniature step-down converters introduced by National Semiconductor. The series was designed to address the power efficiency and size demands of early-generation portable consumer electronics. The LM3670MF-1.6/NOPB represents a specific fixed-voltage configuration within this lineup, now maintained under the Texas Instruments portfolio.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3670MFX-1.875/NOPB offers a different fixed output voltage. LM3670MF-ADJ/NOPB provides an adjustable output range instead of a fixed value. LM3674MFX-1.2/NOPB is a similar device with a 2 MHz switching frequency.