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參數資料
| 型號： | LM2984 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Microprocessor Power Supply System |
| 中文描述： | 微機電源系統 |
| 文件頁數： | 11/16頁 |
| 文件大?。?/td> | 398K |
| 代理商： | LM2984 |
Typical Performance Characteristics
(Continued)
Application Hints
OUTPUT CAPACITORS
The LM2984 output capacitors are required for stability.
Without them, the regulator outputs will oscillate, sometimes
by many volts. Though the 10 μF shown are the minimum
recommended values, actual size and type may vary de-
pending upon the application load and temperature range.
Capacitor effective series resistance (ESR) also affects the
IC stability. Since ESR varies from one brand to the next,
some bench work may be required to determine the mini-
mum capacitor value to use in production. Worst case is usu-
ally determined at the minimum ambient temperature and
the maximum load expected.
Output capacitors can be increased in size to any desired
value above the minimum. One possible purpose of this
would be to maintain the output voltages during brief condi-
tions of negative input transients that might be characteristic
of a particular system.
Capacitors must also be rated at all ambient temperatures
expected in the system. Many aluminum type electrolytics
will freeze at temperatures less than 30C, reducing their
Ripple Rejection (V
OUT
)
DS011252-49
Ripple Rejection (V
buf
)
DS011252-50
Ripple Rejection (V
stby
)
DS011252-51
Output Voltage
DS011252-8
Device Dissipation vs
Ambient Temperature
DS011252-9
Output Capacitor ESR
(Standby Output, Pin 9)
DS011252-10
Output Capacitor ESR
(Buffer Output, Pin 10)
DS011252-11
Output Capacitor ESR
(Main Output, Pin 11)
DS011252-12
11
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2984CT | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LM2984CT/NOPB | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LM2984T | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LM2984T/NOPB | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LM2990J-12-QML | 制造商:National Semiconductor Corporation 功能描述:LDO Regulator Neg -12V 1.8A 16-Pin CDIP Tray 制造商:National Semiconductor 功能描述:LDO Regulator Neg -12V 1.8A 16-Pin CDIP Tray |
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