TLE8088EM datasheet(9/24 Pages) INFINEON

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Data Sheet

Rev 1.0, 2012-10-01

TLE 8088 EM

Voltage Regulator

5.1

Voltage Regulator

The TLE8088EM integrates a voltage regulator for load currents up to 250mA. The voltage applied to pin VS is

regulated at pin V5DD to 5.0 V with a precision of

±2%. The sophisticated design allows to achieve stable

operation even with ceramic output capacitors down to 470nF. The voltage regulator features under-voltage reset,

power on reset and watchdog. It is protected against over-current, short circuit and over temperature conditions.

The low-side switch function and the K-line transceiver are independent of the reset and watchdog signals.

Figure 3

5V Supply

5.2

Power On Reset and Reset Output

Reset output is an open drain output. When the level of

V5DD reaches the reset threshold VRT, the signal at NRO

remains low for the power-on reset delay time

RD. The reset function and timing is illustrated in Figure 4. The

reset reaction time

RR avoids wrong triggering caused by short “glitches” on the V5DD-line. In case of V5DD power

down (

V5DD < VRT for t > tRR) a logic low signal is generated at the pin NRO to reset an external micro controller.

The level of the reset threshold for increasing

V5DD is for the hysteresis (VRH) higher than the level for decreasing

V5DD.

The reset and watchdog signals are for external use and do not affect the state of the channels and K-line

transceiver. The correct functionality of the devices is ensured by an independent voltage monitoring circuitry.

Vref

V5DD

e.g. µC

IV5DD

IVS

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