OPTIREG™ SBC TLE9274QXV33
DC/DC regulators
The tlag is always present in case of PWM to PFM transition.
The automatic transition can be disabled by setting the bit PWM_AUTO to 0 in the HW_CTRL register.
6.4.2.2 Manual transition from PFM to PWM in SBC Stop mode
The PFM to PWM transition can also be controlled by the microcontroller or an external signal, directly by
using the WK pin as a trigger signal if an additional current is required in SBC Stop mode.
When the PWM_BY_ WK bit is set to 1, the DC/DC regulator can be switched from PFM to PWM using the WK pin.
A LOW level at the WK pin will switch the buck converter to PFM mode, a HIGH level will switch it to PWM mode.
In this configuration, the filter time is not taken into account because a defined signal from µC or external
source is expected.
If the PWM_BY_ WK bit is set to 0, the PFM modulation is used.
Datasheet
37
Rev.2.0
2022-05-06
INFINEON [ Infineon ]
