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TDA3663 Fiches technique(PDF) 5 Page - NXP Semiconductors

No de pièce TDA3663
Description  Very low dropout voltage/quiescent current 3.3 V voltage regulator
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA3663 Fiches technique(HTML) 5 Page - NXP Semiconductors

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© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 05 — 13 June 2005
5 of 17
Philips Semiconductors
TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator
11. Application information
11.1 Noise
The output noise is determined by the value of the output capacitor. The noise figure is
measured at a bandwidth of 10 Hz to 100 kHz (see Table 7).
11.2 Stability
For stable operation:
The output capacitor ESR should not exceed 22
Ω (worst-case)
A minimum ESR may be required; see Table 8
It is recommended not to use below 1 mA output current because of reduced phase
margin
Use electrolytic capacitors for output capacity values of 1
µF and above
11.3 Application circuits
The maximum output current of the regulator equals:
When Tamb =21 °C and VP = 14 V the maximum output current equals 116 mA.
The total thermal resistance of the TDA3663 can be decreased from 155 K/W to 30 K/W
for the SO8 version. For the SO4 version it can be decreased from 100 K/W to 25 K/W
when GND pins 2 and 4 of the package are soldered to the printed-circuit board.
Table 7:
Noise figures
Output current IREG (mA)
Noise figure (
µV)
C2=10
µF
C2=47
µF
C2 = 100
µF
0.5
550
320
300
50
650
400
400
Table 8:
Minimum ESR values required
IREG (mA)
C2 = 100 nF
C2=1
µF
C2=10
µF
C2 = 100
µF
1> 0
> 1.5
>0
>0
5> 0
>0
>0
>0
10
> 0
>0
>0
>0
100
> 0
>0
>0
>0
I
REG max
()
150
T
amb
R
th j
a
()
V
P
V
REG
()
×
----------------------------------------------------------
150
T
amb
100
V
P
3.3
()
×
---------------------------------------- mA
()
==


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