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參數(shù)資料
| 型號： | LM2984C |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM2984C Microprocessor Power Supply System |
| 中文描述： | LM2984C微處理器供電系統(tǒng) |
| 文件頁數(shù)： | 6/14頁 |
| 文件大小： | 284K |
| 代理商： | LM2984C |
Block Diagram
TL/H/8821–2
Pin Description
Pin No.
Pin Name
Comments
1
2
3
4
5
6
7
8
9
10
11
V
IN
R
t
C
t
m
P
mon
C
mon
Ground
Reset
ON/OFF
V
standby
V
buffer
V
OUT
Positive supply input voltage
Sets internal timing currents
Sets power-up reset delay timing
Microcomputer monitor input
Sets
m
C 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
Comments
C
IN
R
t
C
t
C
tc
R
tc
1
m
F
130k
0.47
m
F–10
m
F
24k–1.2M
Required if device is located far from power supply filter.
Sets internal timing currents.
0.33
m
F
0.01
m
F
10k
0.033
m
F–3.3
m
F
0.001
m
F–0.1
m
F
1k–100k
Sets power-up reset delay.
Establishes time constant of AC coupled computer monitor.
Establishes time constant of AC coupled computer monitor. (See
applications section.)
C
mon
0.47
m
F
0.047
m
F–4.7
m
F
Sets time window for computer monitor. Also determines period and pulse
width of computer malfunction reset. (See applications section.)
R
rst
10k
5k–100k
Load for open collector reset output. Determined by computer reset input
requirements.
C
stby
10
m
F
10
m
F–no bound
A 10
m
F is required for stability but larger values can be used to maintain
regulation during transient conditions.
C
buf
10
m
F
10
m
F–no bound
A 10
m
F is required for stability but larger values can be used to maintain
regulation during transient conditions.
C
OUT
10
m
F
10
m
F–no bound
A 10
m
F is required for stability but larger values can be used to maintain
regulation during transient conditions.
6
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2984CT | 功能描述:低壓差穩(wěn)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(diào)節(jié):0.3 % 輸出端數(shù)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(wěn)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(diào)節(jié):0.3 % 輸出端數(shù)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(wěn)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(diào)節(jié):0.3 % 輸出端數(shù)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(wěn)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(diào)節(jié):0.3 % 輸出端數(shù)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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