參數(shù)資料
型號(hào)： TDA3608TH/N3C,512
廠商： NXP SEMICONDUCTORS
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO20
封裝： PLASTIC, HSOP-20
文件頁(yè)數(shù)： 7/22頁(yè)
文件大?。?/td> 122K
代理商： TDA3608TH/N3C,512
2003 Nov 28
15
Philips Semiconductors
Product specication
Multiple voltage regulators with switch
TDA3608Q; TDA3608TH
Application information
NOISE
The noise on the supply line depends on the value of the
supply capacitor and is caused by a current noise (the
output noise of the regulators is translated into a current
noise by means of the output capacitors). Table 1 shows
the noise figure with the corresponding output capacitor Co
for each regulator. The noise is minimal when a high
frequency capacitor of 220 nF in parallel with an
electrolytic capacitor of 100
F is connected directly to
pins VP and GND.
Table 1
Noise gure; note 1
Note
1. Measured at a bandwidth of 200 kHz.
STABILITY
The regulators are made stable with the externally
connected output capacitors. The output capacitors can be
selected using the graphs of Figs 13 and 14. When an
electrolytic capacitor is used, the temperature behaviour of
this output capacitor can cause oscillations at low
temperature. The next two examples show how an output
capacitor value is selected.
Example 1
The regulator 1 is made stable with an electrolytic output
capacitor of 220
F with ESR = 0.15 . At Tamb = 30 °C
the capacitor value is decreased to 73
F and the ESR is
increased to 1.1
. The regulator remains stable at
Tamb = 30 °C (see Fig.13).
Example 2
The regulator 2 is made stable with an electrolytic
capacitor of 10
F with ESR = 3 . At Tamb = 30 °C the
capacitor value is decreased to 3
F and the ESR is
increased to 23.1
. The regulator will be instable at
Tamb = 30 °C (see Fig.14).
Solution
Use a tantalum capacitor of 10
F or a larger electrolytic
capacitor. The use of tantalum capacitors is recommended
to avoid problems with stability at low temperatures.
REGULATOR
NOISE FIGURE (
V)
Co =10 FCo =47 FCo = 100 F
1
225
150
135
2
225
150
135
3
255
200
180
handbook, halfpage
1
0
110
C (
F)
MBK100
2
3
4
stable region
maximum ESR
minimum ESR
100
R
(
)
Fig.13 Curves for selecting value of output
capacitor for regulator 1 and regulator 3.
handbook, halfpage
2
0
0.22
110
C (
F)
MBK099
4
6
8
10
12
stable region
maximum ESR
minimum ESR
100
R
(
)
14
Fig.14 Curves for selecting value of output
capacitor for regulator 2.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA3608THQ 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multiple voltage regulators with switch
TDA3609 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multiple voltage regulator with switch and ignition buffers
TDA3609JR 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multiple voltage regulator with switch and ignition buffers
TDA3615J 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multiple voltage regulator
TDA3615J/N2,112 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) CARRADIO POWER AMPLIFIERS RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
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