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參數(shù)資料
| 型號： | TDA3665 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Very low dropout voltage/quiescent current adjustable voltage regulator(低壓差/靜態(tài)電流可調(diào)電壓穩(wěn)壓器) |
| 中文描述： | 8.5 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO4 |
| 封裝： | 3.50 MM, PLASTIC, TO-261, SOT-223-1, SOP-4 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 93K |
| 代理商： | TDA3665 |
2000 Apr 25
7
Philips Semiconductors
Preliminary specification
Very low dropout voltage/quiescent current
8.5 V voltage regulator
TDA3665
TEST AND APPLICATION INFORMATION
ndbook, halfpage
MBL127
1
3
2, 4
C2
10
μ
F
TDA3665
C1
1
μ
F
VREG = 8.5 V
Fig.4 Test circuit (SO4).
C1 is optional (to minimize supply noise only).
handbook, halfpage
MDA961
ESR
(
)
C2 (
μ
F)
2
10
1
10
1
10
1
1
10
10
2
stable region
(2)
(1)
Fig.5
Graph for selecting the value of the output
capacitor.
(1) Maximum ESR at 200
μ
A
≤
I
REG
≤
100 mA.
(2) Minimum ESR only when I
REG
≤
200
μ
A.
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.
OUTPUT
CURRENT
I
REG
(mA)
0.5
50
NOISE FIGURE (
μ
V)
C2 = 10
μ
F
C2 = 47
μ
F
C2 = 100
μ
F
550
650
320
400
300
400
handbook, halfpage
MDA962
ESR
(
)
IREG (mA)
3
10
2
10
22
1
10
1
1
10
10
3
10
2
stable region
Fig.6
ESR as a function of I
REG
for selecting the
value of the output capacitor.
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