LM3671MF-1.2/NOPB

The LM3671 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 600-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 range from
1.1 V to 3.3 V.
The device offers superior features and performance
for mobile phones and similar portable systems.
Automatic intelligent switching between PWM lownoise and PFM low-current mode offers improved
system control. 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).
A high-switching frequency of 2 MHz (typical) allows
use of tiny surface-mount components. Only three
external surface-mount components, an inductor, and
two ceramic capacitors, are required.