TLE8262E Datasheet, PDF (25/93 Pages) Infineon Technologies AG – Universal System Basis Chip HERMES Rev. 1.0

TLE8262E
External Voltage Regulator
7.4
Application Information
7.4.1 Timing information
Figure 7 shows the typical timing, ramp up and ramp down of the External Voltage Regulator, in regards to the V_S
pin.
Vs
VVextU V
VU V _O FF
Vcc3
Vcc 3
t
SPI
GND
Figure 7 Supply Voltage Management
t
Undervoltage Managment vcc 3.vsd
7.4.2 External Components
During production test, the listed parameter are tested with the PNP transistor MJD253 from ON semi.
Characterization is done with the BCP52-16 from Infineon (I_CC3<200 mA). Other PNP transistors can be used.
Function must be checked in the application.
Figure 8 shows the hardware set up used.
V_S
C₁
R_SHUNT
T1
V_S
Vcc3shunt
Vcc3base
Vcc3ref
V_CC3
I_CC3
C₂
V_S-V_CC3shunt >
V_{shunt_threhold}
R_BE
State machine
I_CC3base
+
-
V_REF
Figure 8 Hardware Set Up
External voltage diagram_appli_note.vsd
Data Sheet
25
Rev. 1.0, 2009-03-31