TLE9461ES datasheet(49/140 Pages) INFINEON

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TLE9461ES

Lite CAN SBC Family

Voltage Regulator 2

Datasheet

Rev.1.1

2019-09-27

7.2

Functional Description

In SBC Normal Mode VCC2 can be switched On or Off via SPI.

For SBC Stop- or Sleep Mode, the VCC2 has to be switched On or Off in SBC Normal Mode before entering the

respective SBC mode. The regulator is automatically switched Off in SBC Restart Mode

The regulator can provide an output current up to IVCC2,lim.

For low-quiescent current reasons, the output voltage accuracy is decreased in SBC Stop and Sleep Mode (if

enabled) because a low-power mode regulator with a lower accuracy (VCC2,out4) is active for small loads. If the

load current on VCC2 exceeds IVCC2 > IVCC2,Ipeak,r then the high-power mode regulator will also be enabled to

support an optimum dynamic load behavior. The current consumption increases by typ. 2.9mA. The SBC Mode

stays unchanged.

If the load current on VCC2 falls below the threshold (IVCC2 < IVCC2,Ipeak,f), then the low-quiescent current mode

is resumed by 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 the load. Sufficient

damping must be provided.

Note:

To avoid excessive repetitive short-circuit conditions, It is recommended to detect the shutdown

reason for VCC2 and keep the regulator Off after multiple over-temperature shutdowns.

7.2.1

Short to Battery Protection

The output stage is protected for short to VBAT. No inverse current flows if the voltage on VCC2 is higher than

the nominal output voltage.

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