TDA3606 Просмотр технического описания (PDF) - Philips Electronics
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TDA3606 Datasheet PDF : 16 Pages
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Philips Semiconductors
Multiple voltage regulator with battery
detection
TEST AND APPLICATION INFORMATION
Test information
handbook, full pagewidth
VP
VI(bat)
(1)
10 µF
VP
8
VC 3
battery input voltage
1
10 µF
TDA3606
4
GND
regulator output
7
10 µF
reset 1 output
6
reset 2 output
5
battery output voltage
2
MGB808
Product specification
TDA3606
RL(REG)
1 kΩ .. 0.5 Ω
RL(RES1)
1 kΩ
RL(RES2)
1 kΩ
RL(bat)
1 kΩ
(1) Capacitor not required for stability.
Fig.5 Test circuit.
Application information
NOISE
The noise at the output of the regulator depends on the
bandwidth of the regulator, which can be adjusted by
means of the output capacitor. In Table 1 the noise figures
are given.
Table 1 Noise figures
OUTPUT
CURRENT
IO (mA)
NOISE FIGURE (µV)(1)
AT OUTPUT CAPACITOR CL (µF)
10
47
100
0.5
58
50
45
50
250
200
180
Note
1. Measured at a bandwidth of 10 Hz to 100 kHz.
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 regulator is translated into a current noise by
means of the output capacitor). When a high frequency
capacitor of 220 nF in parallel with an electrolytic capacitor
of 100 µF is connected directly to pins 8 and 4 (supply and
ground) the noise is minimized.
STABILITY
The regulator is stabilized by means of the output
capacitor. The value of the output capacitor can be
selected using the diagram shown in Fig.6. The following
two examples show the effects of the stabilization circuit
using different values for the output capacitor.
Example 1
The regulator is stabilized using an electrolytic output
capacitor of 68 µF (ESR = 0.5 Ω). At −40 °C the capacitor
value is decreased to 22 µF and the ESR is increased to
3.5 Ω. The regulator will remain stable at a temperature of
−40 °C.
Example 2
The regulator is stabilized using an electrolytic output
capacitor of 10 µF (ESR = 3.3 Ω). At −40 °C the capacitor
value is decreased to 3 µF and the ESR is increased to
23.1 Ω. The regulator will be instable at a temperature of
−40 °C. This can be solved using a tantalum capacitor of
10 µF.
1998 Jun 16
8
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