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參數(shù)資料
| 型號： | SA57005 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Multiple output low noise, low dropout linear regulator |
| 中文描述： | 多輸出低噪聲，低壓差線性穩(wěn)壓器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 148K |
| 代理商： | SA57005 |
Philips Semiconductors
Product data
SA57005
Multiple output low noise, low dropout linear regulator
2002 Jun 20
8
APPLICATION INFORMATION
For good performance, the following points must be considered:
Input capacitor
An input capacitor of
≥
1
μ
F is required between the SA57005 input
and the ground (the amount of capacitance may be increased
without limit).
This capacitor must be located as close as possible to V
IN
or GND
pin (not more than 1 cm) and returned to a clean analog ground.
Any good quality ceramic, tantalum or film capacitor will work.
Output capacitor
Phase compensation is made for securing stable operation even if
the load current varies. For this reason, an output capacitor with
good frequency characteristics is needed at each of the three
outputs. Set it as close to the circuit as possible and make the wiring
as short as possible.
The value of the output capacitance has to be at least 1
μ
F. Also it
must have the ESR (Equivalent Series Resistance) value within the
stable range shown Figure 8.
PS (Chip Enable) pins
These active-HIGH ON/OFF pins must be actively terminated. If the
function is not to be used, the corresponding PS pin should be tied
to V
IN
. PS1 (pin 1) controls V
o1
while PS2/3 (pin 2) controls V
o2
and
V
o3
simultaneously. In other words V
o2
and V
o3
are always in the
same state, either both active or both inactive depending on the
input of PS2/3.
Line impedance of V
IN
and GND
The V
IN
and GND lines should be sufficiently wide. Otherwise when
the impedance of these lines is high, there is a chance to pick-up
noise or malfunction.
SA57005
1
2
3
4
8
7
6
5
1
μ
F
V
IN
1
1
1
1
μ
F
1
μ
F
1
μ
F
V
o1
V
o2
V
o3
GND
V
o1
V
o2
V
o3
PS1
PS2/3
NC
V
IN
SL01706
Figure 11. Typical application circuit.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SA57005DH | Multiple output low noise, low dropout linear regulator |
| SA57022-18D | 500 mA LDO with ON/OFF control and Vref bypass |
| SA57022-25D | 500 mA LDO with ON/OFF control and Vref bypass |
| SA57022-28D | 500 mA LDO with ON/OFF control and Vref bypass |
| SA57022-30D | 500 mA LDO with ON/OFF control and Vref bypass |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA57005DH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multiple output low noise, low dropout linear regulator |
| SA57022-18D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:500 mA LDO with ON/OFF control and Vref bypass |
| SA57022-25D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:500 mA LDO with ON/OFF control and Vref bypass |
| SA57022-28D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:500 mA LDO with ON/OFF control and Vref bypass |
| SA57022-30D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:500 mA LDO with ON/OFF control and Vref bypass |
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