7.4 Device Functional Modes
The step-down converter has two modes of operation to maximize efficiency:
- PFM
- For light loads
- For automatic transition between this mode and PWM mode when MODE pin is pulled low over all load ranges
- PWM
- For moderate to heavy loads
- For a small output ripple
- For maintaining the specified switching frequency variation by pulling the MODE pin high which places the device in a forced PWM mode over the entire load range.