TDA3663 Просмотр технического описания (PDF) - NXP Semiconductors.
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TDA3663 Datasheet PDF : 17 Pages
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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).
Table 7: Noise figures
Output current IREG (mA)
0.5
50
Noise figure (µV)
C2 = 10 µF
550
650
C2 = 47 µF
320
400
C2 = 100 µF
300
400
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
Table 8: Minimum ESR values required
IREG (mA)
1
C2 = 100 nF
>0Ω
C2 = 1 µF
> 1.5 Ω
5
>0Ω
>0Ω
10
>0Ω
>0Ω
100
>0Ω
>0Ω
C2 = 10 µF
>0Ω
>0Ω
>0Ω
>0Ω
C2 = 100 µF
>0Ω
>0Ω
>0Ω
>0Ω
11.3 Application circuits
The maximum output current of the regulator equals:
I REG(max) = -R---t--h---(--j--–---1-a--5)---0×-----–(---V-T---P-a---m–---b--V----R---E---G----) = 1----0---01---5-×--0---(--–V----T-P---a-–--m--3-b--.--3----)(mA)
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.
9397 750 15047
Product data sheet
Rev. 05 — 13 June 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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