The LM3673 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 350-mA load current over the entire input voltage range. There are several different fixed voltage output options available, as well as an adjustable output voltage version ranging from 1.1 V to 3.3 V.
The device offers superior features and performance for mobile phones and similar
portable systems. The LM3673 uses intelligent automatic switching between pulse width modulation
(PWM) and pulse frequency modulation (PFM) for better efficiency. During PWM mode, the device
operates at a fixed-frequency of
2 MHz (typical). Hysteretic PFM mode extends the battery life by reducing the quiescent
current to 16 µA (typical) during light load and standby operation. Internal synchronous
rectification provides high efficiency during PWM mode operation. In shutdown mode, the device
turns off and reduces battery consumption to 0.01 µA (typical).
The LM3673 is available in a tiny 5-pin DSBGA package. A high switching frequency of 2 MHz (typical) allows the use of three tiny surface-mount components: an inductor and two ceramic capacitors.
For all available packages, see the orderable addendum at the end of the data sheet.| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM3673 2-MHz, 350-mA Step-Down DC-DC Converter datasheet (Rev. M) | PDF | HTML | 15 Nov 2016 |
| User guide | AN-1465 LM3673 Evaluation Board (Rev. D) | 05 Jul 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YZR) | 5 | Ultra Librarian |
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