tda3666at NXP Semiconductors, tda3666at Datasheet - Page 7

• Manufacturer Part Number: tda3666at
• Description: Very Low Dropout Voltage/quiescent Current 10 V Voltage Regulator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TEST AND APPLICATION INFORMATION
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 1).
Table 1 Noise figures
Stability
The regulator is stabilized with an external capacitor
connected to the output. The value of this capacitor can be
selected using the diagrams shown in Figs 5 and 6.
The following four examples show the effects of the
stabilization circuit using different values for the output
capacitor.
2000 Apr 26
handbook, halfpage
CURRENT
I
Very low dropout voltage/quiescent current
10 V voltage regulator
OUTPUT
REG
C1 is optional (to minimize supply noise only).
0.5
50
(mA)
V P
1 F
C1
C2 = 10 F
Fig.4 Test circuit (SO4).
550
650
1
TDA3666
NOISE FIGURE ( V)
2, 4
C2 = 47 F
3
320
400
MBL131
C2
10 F
V REG = 10 V
C2 = 100 F
300
400
7
handbook, halfpage
handbook, halfpage
(1) Maximum ESR at 200 A
(2) Minimum ESR only when I
Fig.5
Fig.6
ESR
ESR
( )
( )
10
10
10
10
10
10
10
22
10
1
1
2
3
2
1
1
1
1
Graph for selecting the value of the output
capacitor.
ESR as a function of I
value of the output capacitor.
(2)
stable region
10
1
(1)
stable region
REG
I
REG
200 A.
100 mA.
REG
Preliminary specification
10
10
2
for selecting the
I REG (mA)
C2 ( F)
TDA3666
MDA961
MDA962
10
10
2
3