TLE5012B datasheet(45/50 Pages) INFINEON

45 / 50 page

TLE5012B

Specification

Data Sheet

Rev. 2.0, 2014-02

4.6.1

Internal Supply Voltage Comparators

Every voltage regulator has an overvoltage (OV) comparator to detect malfunctions. If the nominal output voltage

of 2.5 V is larger than VOVG, VOVA and VOVD, then this overvoltage comparator is activated.

4.6.2

VDD Overvoltage Detection

The overvoltage detection comparator monitors the external supply voltage at the VDD pin.

Figure 4-22 Overvoltage comparator

4.6.3

GND - Off Comparator

The GND - Off comparator is used to detect a voltage difference between the GND pin and SCK. This circuit can

detect a disconnection of the supply GND Pin.

Figure 4-23 GND - off comparator

4.6.4

VDD - Off Comparator

The VDD - Off comparator detects a disconnection of the VDD pin supply voltage. In this case, the TLE5012B is

supplied by the SCK and CSQ input pins via the ESD structures.

Figure 4-24 VDD - off comparator

REF

10µs

Spike

Filter

xxx_OV

VDDA

GND

VDD

VRG

VRA

VRD

10µs

Spike

Filter

GND_OFF

VDDA

GND

SCK

GND

VDD

+dV

Diode-

reference

1µs

Mono

Flop

10µs

Spike

Filter

VDD_OFF

VDDA

GND

VDD

CSQ

SCK

-dV

GND

1µs

Mono

Flop

VVDDoff

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