TDA3607 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA3607 Datasheet PDF : 16 Pages
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Philips Semiconductors
Multiple voltage regulator with switch
TEST AND APPLICATION INFORMATION
Test information
Preliminary specification
TDA3607
handbook, full pagewidth
VP
Ven2
Ven3
Ven1
C1 (1)
220 nF
VP
3
enable input regulator 2
9
enable input regulator 3
1
enable input regulator 1
2
TDA3607
8
GND
regulator 2
6
regulator 3
5
regulator 1
4
MBG719
5V
C2
47 µF
5V
C3
47 µF
9V
C4
47 µF
RL(REG2)
1 kΩ
RL(REG3)
1 kΩ
RL(REG1)
1 kΩ
(1) Capacitor not required for stability.
Fig.5 Test circuit.
Application information
NOISE
Table 1 Noise figures
NOISE FIGURE (µV)(1)
REGULATOR
at OUTPUT CAPACITOR (µF)
10
47
100
1
−
150
−
2
−
150
−
3
−
200
−
Note
1. Measured at a bandwidth of 200 kHz.
When a high frequency capacitor of 220 nF in parallel with
an electrolytic capacitor of 100 µF is connected directly to
pins 3 and 8 (supply and ground) the noise is minimal.
STABILITY
The regulators are made stable with the externally
connected output capacitors. The value of the output
capacitors can be selected by referring to the graphs
illustrated in Figs 6 and 7.
When an electrolytic capacitor is used the temperature
behaviour of this output capacitor can cause oscillations at
cold temperature.
The following two examples explain how an output
capacitor value is selected.
The noise on the supply line depends on the value of the
supply capacitor and is caused by a current noise (output
noise of the regulators is translated into a current noise by
means of the output capacitors).
1997 May 05
9
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