TLE4418G Datasheet, PDF (3/10 Pages) Infineon Technologies AG – Triple Voltage Regulator

TLE 4418 G
Circuit Description
Each of the output voltages features a reference voltage kept highly accurate by internal
resistance adjustment. An error amplifier compares this reference voltage to the divided
output voltage and drives the base of the Darlington power element. Over-saturation of
the power element is prevented by an integrated saturation control circuit. While the
output current is driven by V_CC maintaining a reasonable power dissipation the higher
voltage level at V_DD allows to keep the drop voltage relatively low and supplies the 8.0 V
output. The regulation loops are kept stable even for low output capacitances down to
2.2 µF (ESR £ 4 W).
VDD
5 _Q8
Bandgap
R e fe re n c e
VCC
P re -d riv e r
Bandgap
R e fe re n c e
P re -d riv e r
Bandgap
R e fe re n c e
Figure 2 Block Diagram
Current and
S a tu ra tio n
C o n tro l,
O vercurrent
P ro te c tio n
4 _GND8
2 _Q3
Current and
S a tu ra tio n
C o n tro l,
O vertem perature
and O vercurrent
P ro te c tio n
7 _Q2
Current and
S a tu ra tio n
C o n tro l,
O vertem perature
and O vercurrent
P ro te c tio n
R _{Q ,Q 2}
R _{G ,Q 2}
1
GND3
Target Data Sheet Rev. 0.1
3
2001-12-10