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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： | 6/16頁 |
| 文件大小： | 398K |
| 代理商： | LM2984 |
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
Pin Name
V
IN
R
t
C
t
μP
mon
C
mon
Ground
Reset
ON/OFF
V
standby
V
buffer
V
OUT
Comments
Positive supply input voltage
Sets internal timing currents
Sets power-up reset delay timing
Microcomputer monitor input
Sets μC monitor timing
Regulator ground
Reset error flag output
Enables/disables high current regulators
Standby regulator output (7.5 mA)
Buffer regulator output (100 mA)
Main regulator output (500 mA)
External Components
Component
Typical Value
Component
Range
0.47 μF–10 μF
24k–510k
0.033 μF–3.3 μF
0.001 μF–0.1 μF
1k–100k
Comments
C
IN
R
t
C
t
C
tc
R
tc
1 μF
130k
0.33 μF
0.01 μF
10k
Required if device is located far from power supply filter.
Sets internal timing currents.
Sets power-up reset delay.
Establishes time constant of AC coupled computer monitor.
Establishes time constant of AC coupled computer monitor. (See
applications section.)
Sets time window for computer monitor. Also determines period and pulse
width of computer malfunction reset. (See applications section.)
Load for open collector reset output. Determined by computer reset input
requirements.
A 10 μF is required for stability but larger values can be used to maintain
regulation during transient conditions.
A 10 μF is required for stability but larger values can be used to maintain
regulation during transient conditions.
A 10 μF is required for stability but larger values can be used to maintain
regulation during transient conditions.
C
mon
0.47 μF
0.047 μF–4.7 μF
R
rst
10k
5k–100k
C
stby
10 μF
10 μF–no bound
C
buf
10 μF
10 μF–no bound
C
OUT
10 μF
10 μF–no bound
www.national.com
6
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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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