OPTIREG™ SBC TLE9274QXV33
Voltage regulator 2
7.2
Functional description
In SBC Normal mode, VCC2 can be switched on or off via SPI.
For SBC Stop mode or Sleep mode, the VCC2 has to be switched on or off before entering the respective SBC
mode.
The output current of VCC2 is limited at IVCC2,lim
.
The VS2 pin is the dedicated supply pin for VCC2. VS2 can be connected to VS and therefore to the boost
output, or directly from battery after the reverse protection input diode.
For low-quiescent current, the output voltage tolerance is decreased in SBC Stop mode because only a low-
power mode regulator (with lower accuracy VCC2,out5) will be active for small loads. If the load current on VCC2
increases (typ. more than 1.5 mA), then the high-power mode regulator will also be enabled to support an
optimum dynamic load behavior. When both power mode regulators are active, the VCC2 quiescent current
will the typical increase by 2.9 mA.
If the load current on VCC2 decreases (typically below 1.3 mA), then the low-quiescent current mode is
resumed again disabling the high-power mode regulator.
Both regulators are active in SBC Normal mode.
Note: If the VCC2 output voltage is supplying external off-board loads, the application must consider the series
resonance circuit built by cable inductance and decoupling capacitor at load. Sufficient damping must
be provided.
Datasheet
44
Rev.2.0
2022-05-06
INFINEON [ Infineon ]
