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參數(shù)資料
| 型號： | LP2956IMX |
| 英文描述： | Positive Adjustable Voltage Regulator |
| 中文描述： | 積極可調電壓穩(wěn)壓器 |
| 文件頁數(shù)： | 11/21頁 |
| 文件大?。?/td> | 640K |
| 代理商： | LP2956IMX |
Application Hints
(Continued)
REDUCING OUTPUT NOISE
In reference applications it may be advantageous to reduce
the AC noise present at the output. One method is to reduce
the regulator bandwidth by increasing the size of the output
capacitor. This is the only way noise can be reduced on the
3 lead LP2950 but is relatively inefficient, as increasing the
capacitor from 1 μF to 220 μF only decreases the noise from
430 μV to 160 μV rms for a 100 kHz bandwidth at 5V output.
Noise can be reduced fourfold by a bypass capacitor across
R
, since it reduces the high frequency gain from 4 to unity.
Pick
or about 0.01 μF. When doing this, the output capacitor must
be increased to 3.3 μF to maintain stability. These changes
reduce the output noise from 430 μV to 100 μV rms for a
100 kHz bandwidth at 5V output. With the bypass capacitor
added, noise no longer scales with output voltage so that im-
provements are more dramatic at higher output voltages.
DS008546-7
*
See Application Hints
feDrive with TTL-high to shut down. Ground or leave open if shutdown
Note:
Pins 2 and 6 are left open.
FIGURE 2. Adjustable Regulator
www.national.com
11
相關PDF資料 |
PDF描述 |
|---|---|
| LP2957AISX | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP2957ISX | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP2950ACDT5.0 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP2950ACDT5.0RK | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP2950ACDT-5.0RK | VOLT REGULATOR|FIXED|+5V|BIPOLAR|SIP|3PIN|PLASTIC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LP2956IN | 功能描述:IC REG LDO ADJ .25A 16-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.28V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應商設備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LP2956IN/NOPB | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 1.23V to 29V 0.25A/0.075A 16-Pin PDIP Rail |
| LP2957A-12 WAF | 制造商:Texas Instruments 功能描述: |
| LP2957AIS/NOPB | 功能描述:IC REG LDO 5V .25A TO-263-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.28V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應商設備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LP2957AIS/NOPB | 制造商:Texas Instruments 功能描述:Voltage Regulator IC |
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