NATIONAL SEMICONDUCTOR LM3671 Manual
Update: 30 September, 2023
The LM3671 is a 2MHz, 600mA step-down DC-DC converter from TI. It is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7V to 5.5V. It provides up to 600mA load current, over the entire input voltage range. There are several different fixed voltage output options avail- able as well as an adjustable output voltage version range from 1.1V to 3.3V. The device offers superior features and performance for mo- bile phones and similar portable systems. Automatic intelli- gent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typ.). Hys- teretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typ.) during light load and standby operation. Internal synchronous rectification provides high ef- ficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typ.). The LM3671 is available in SOT23-5, tiny 5-bump micro SMD and a 6-pin LLP packages in leaded (PB) and lead-free (NO PB) versions. A high switching frequency of 2 MHz (typ.) al- lows use of tiny surface-mount components. Only three ex- ternal surface-mount components, an inductor and two ceramic capacitors, are required.
Brand: National
File format: PDF
Size: 1486 KB
MD5 Checksum: FFFE22850FE53AC745609ACAD2C5D5D9
Publication date: 11 April, 2012
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PDF Link: NATIONAL SEMICONDUCTOR LM3671 Manual PDF