TLE7368 Datasheet, PDF (35/39 Pages) Infineon Technologies AG – Next Generation Micro Controller Supply

TLE7368
Application Information
6.4
Setting up the Stand-by Regulator
The stand by regulator provides an output current up to 30 mA sourced via linear regulation directly from Battery
even when the main regulator is disabled. This low quiescent current regulator is commonly used as supply for
stand by memory. The output voltage can be selected as 1.0 V or 2.6 V. For stability of the regulation loop the
output Q_STBY should be connected via a ceramic capacitor (470 nF to 2 µF) to GND.
6.4.1 Stand-by Regulator’s Output Voltage Configuration
The stand by regulator provides an output voltage of nominal 1.0 V or 2.6 V which is associated with an
appropriate stand-by monitoring threshold. The output voltage level is selected by the SEL_STBY configuration.
Connecting SEL_STBY to GND results in a voltage level of 2.6 V at Q_STBY, while connecting SEL_STBY with
Q_STBY leads to 1.0 V configuration. An integrated pull-up current ensures that the system will turn in the lower
stand-by voltage mode in case of open mode at the SEL_STBY pin. However the SEL_STBY pin should be
connected either to Q_STBY or to GND in order to select the appropriate Q_STBY voltage level. Intermediate
voltage levels at SEL_STBY should be avoided.
Table 2 Stand-by Regulator’s Output Voltage Configuration
No. SEL_STBY
Q_STBY
1
GND
2.6 V
2
Q_STBY
1.0 V
Data Sheet
35
Rev. 1.1, 2007-11-08