Datasheet

2003 Nov 28 13
Philips Semiconductors Product specification
Multiple voltage regulators with switch TDA3608Q; TDA3608TH
10. The peak current of 300 mA can only be applied for short periods (t < 100 ms).
11. The dropout voltage is measured between pins BU and REG2.
12. The dropout voltage of the power switch is measured between pins V
P
and SW.
13. The maximum output current of the power switch is limited to 1.8 A when V
P
>18V.
14. During short-circuit, current I
sc
of the power switch is held constant to a lower value than the continuous current after
a delay of at least 10 ms. Furthermore, a foldback function is activated after the delay. When V
SW
< 3.5 V, the
short-circuit current is reduced to 0.5 A (typical value). The short-circuit protection of the power switch functions best
when C1 = 220 µF and C2 = 10 µF.
15. The reverse current of the backup switch is the current which is flowing out of pin V
P
at V
P
=0V.
handbook, halfpage
300
MGT571
8.5
2
V
REG1
(V)
I
sc
I
REG1
(mA)
I
m
Fig.8 Foldback current protection of regulator 1.
handbook, halfpage
50
MGT572
5.0
1
I
sc
I
m
V
REG2
(V)
I
REG2
(mA)
Fig.9 Foldback current protection of regulator 2.
handbook, halfpage
200
MGT573
5.0
1
I
sc
I
m
V
REG3
(V)
I
REG3
(mA)
Fig.10 Foldback current protection of regulator 3.
handbook, halfpage
MGT574
14.2
3
V
SW
(V)
0.5
I
SW
(A)
2
(1)
Fig.11 Current protection of power switch.
(1) Delayed; time depends on value of capacitor C7.