TDA3616T PHILIPS [NXP Semiconductors], TDA3616T Datasheet - Page 11

• Manufacturer Part Number: TDA3616T
• Description: Multiple voltage regulator with battery detection
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Application information
N
The noise at the output of the regulator depends on the
bandwidth of the regulator, which can be adjusted by the
output capacitor C
The noise on the supply line depends on the value of the
supply capacitor C
output noise of the regulator is translated into a current
noise by the output capacitor). When a high frequency
capacitor of 220 nF (with an electrolytic capacitor of
100 F connected in parallel) is connected directly
between pins V
Table 1 Noise figures
Note
1. Measured at a bandwidth of 10 Hz to 100 kHz.
2001 Feb 02
handbook, full pagewidth
OISE
Multiple voltage regulator with battery
detection
I
(1) Maximum Equivalent Series Resistance (ESR).
(2) Minimum ESR.
O
0.5
(mA)
50
P
C
and GND the noise is minimized.
L
L
P
. Table 1 shows the noise figures.
= 10 F
250
and is caused by a current noise (the
58
NOISE FIGURE ( V)
ESR
( )
Fig.8 Curve for selecting the value of the output capacitor.
C
8
6
4
2
0
L
= 47 F
200
0.68
50
1
C
(1)
L
= 100 F
(2)
180
45
(1)
10
stable region
11
S
The regulator is stabilized by the output capacitor C
The value of the output capacitor can be selected using
the diagram shown in Fig.8. The following two examples
show the effects of the stabilization circuit using different
values for the output capacitor.
Remark: The behaviour of ESR as a function of the
temperature must be known.
Example 1
The regulator is stabilized using an electrolytic output
capacitor of 68 F (ESR = 0.5 ). At T
capacitor value is decreased to 22 F and the ESR is
increased to 3.5 . The regulator will remain stable at a
temperature of T
Example 2
The regulator is stabilized using an electrolytic output
capacitor of 10 F (ESR = 3.3 ). At T
capacitor value is decreased to 3 F and the ESR is
increased to 23.1 . The regulator will be unstable at a
temperature of T
a tantalum capacitor of 10 F.
output capacitor ( F)
TABILITY
100
amb
amb
= 40 C. This can be solved by using
1000
MBK118
= 40 C.
Product specification
amb
amb
TDA3616
= 40 C the
= 40 C the
L
.