TLE9263QX datasheet(39/164 Pages) INFINEON

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Data Sheet

Rev. 1.1, 2014-09-26

TLE9263QX

Voltage Regulator 1

6.2

Functional Description

The Voltage Regulator 1 (=VCC1) is “ON” in SBC Normal and SBC Stop Mode and is disabled in SBC Sleep and

in SBC Fail-Safe Mode. The regulator can provide an output current up to IVCC1,lim.

For low-quiescent current reasons, the output voltage tolerance is decreased in SBC Stop Mode because only a

low-power mode regulator with a lower accuracy (VCC1,out41) will be active for small loads. If the load current on

VCC1 exceeds the selected threshold (IVCC1,Ipeak1,r or IVCC1,Ipeak2,r) then the high-power mode regulator will be also

activated to support an optimum dynamic load behavior. The current consumption will then increase by typ. 2.9mA.

If the load current on VCC1 falls below the selected threshold (IVCC1,Ipeak1,f or IVCC1,Ipeak2,f), then the low-quiescent

current mode is resumed again by disabling the high-power mode regulator.

Both regulators (low-power mode and high-power mode) are active in SBC Normal Mode.

Two different active peak thresholds can be selected via SPI:

•

I_PEAK_TH = ‘0’(default): the lower VCC1 active peak threshold 1 is selected with lowest quiescent current

consumption in SBC Stop Mode (IStop_1,25, IStop_1,85);

•

I_PEAK_TH = ‘1’: the higher VCC1 active peak threshold 2 is selected with an increased quiescent current

consumption in SBC Stop Mode (IStop_2,25, IStop_2,85);

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