TLE8262E datasheet(21/93 Pages) INFINEON

21 / 93 page

Data Sheet

Rev. 1.0, 2009-03-31

TLE8262E

Internal Voltage Regulator

6.1

Block Description

Figure 4

Functional Block Diagram

The internal voltage regulators are dual low-drop voltage regulators that can supply loads up to

CC1µC/2_max. An

input voltage up to VSMAX is regulated to Vcc1µC/2_nom = 5.0 V with a precision of ±2%. Due to its integrated reset

circuitry, featuring two SPI configurable power-on timing (tRDx) and three SPI configurable output voltages (VRTx)

monitoring, the device is well suited for microcontroller supply. The design enables stable operation even with

ceramic output capacitors down to 470nF, with ESR < 1

Ω @ f = 10 kHz. The device is designed for automotive

applications, therefore it is protected against overload, short circuit, and overtemperature conditions. Figure 4

shows the functional block diagram. If the VS voltage is lower than VUV_OFF, the DMOS of the voltage regulator is

switched to high impedance. The body diodes of the DMOS might go into conduction when

CC1µC or VCC2 > VS

(no reverse protection).

6.2

Internal Voltage Regulator Modes

It is possible to turn

cc1µC via SBC Modes and Vcc2 activity ON or OFF via SPI command or by entering SBC

modes. The limiting current for the both regulators is

CC1µC_max/ICC2.

6.3

Internal Voltage Regulator Modes with SBC Mode

Depending on the SBC Mode in use,

cc1µC and Vcc2 can be either ON or OFF by definition, Vcc2 can be also turned

ON or OFF, via SPI. Table 3 identifies the possible states of the voltage regulators, based on the various SBC

modes.

GND

INTERNA L RE GULA TOR DIA GRA M. V S D

Overtemperature

Shutdown

Bandgap

Reference

Charge

Pump

State

Machine

VCC2

INH

Vref

VCC1µC

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