參數(shù)資料
型號(hào)： LM2984
廠商： National Semiconductor Corporation
英文描述： Microprocessor Power Supply System
中文描述： 微機(jī)電源系統(tǒng)
文件頁數(shù)： 4/16頁
文件大小： 398K
代理商： LM2984
Electrical Characteristics
V
= 14V, C
= 10 μF, C
= 10 μF, C
stby
= 10 μF, unless otherwise indicated.
Boldface
type refers to limits over the en-
tire operating temperature range, 40C
≤
T
A
≤
+125C, all other limits are for T
A
= T
j
= 25C (Note 8) .
Parameter
Conditions
Typical
Limit
(Note 4)
Units
Tracking and Isolation
Tracking
V
OUT
–V
stby
Tracking
V
buf
–V
stby
Tracking
V
OUT
–V
buf
Isolation (Note 1)
V
buf
from V
OUT
Isolation (Note 1)
V
stby
from V
OUT
Isolation (Note 1)
V
OUT
from V
buf
Isolation (Note 1)
V
stby
from V
buf
I
OUT
≤
500 mA, I
buf
= 5 mA,
I
stby
≤
7.5 mA
I
OUT
= 5 mA, I
buf
≤
100 mA,
I
stby
≤
7.5 mA
I
OUT
≤
500 mA, I
buf
≤
100 mA,
I
stby
= 1 mA
R
OUT
= 1
, I
buf
≤
100 mA
±
30
±
100/
±
100
mV
max
±
30
±
100/
±
100
mV
max
±
30
±
100/
±
100
mV
max
5.00
4.50/
4.50
5.50/
5.50
4.50/
4.50
5.50/
5.50
4.50/
4.50
5.50/
5.50
4.50/
4.50
5.50/
5.50
V
min
V
max
V
min
V
max
V
min
V
max
V
min
V
max
R
OUT
= 1
, I
stby
≤
7.5 mA
5.00
R
buf
= 1
, I
OUT
≤
500 mA
5.00
R
buf
= 1
, I
stby
≤
7.5 mA
5.00
Note 1:
Isolation refers to the ability of the specified output to remain within the tested limits when the other output is shorted to ground.
Electrical Characteristics
V
= 14V, I
= 5 mA, I
= 5 mA, I
= 5 mA, R
= 130 k
, C
= 0.33 μF, C
mon
= 0.47 μF, unless otherwise indicated,
Boldface
type refers to limits over the entire operating temperature range, 40C
T
A
≤
+125C, all other limits are for T
A
= T
J
= 25C (Note 8)
Parameter
Conditions
Typical
Limit
(Note 4)
Units
Computer Monitor/Reset Functions
I
reset
Low
V
reset
Low
R
t voltage
V
IN
= 4V, V
rst
= 0.4V
V
IN
= 4V, I
rst
= 1 mA
(Pin 2)
5
2/
0.50
0.40/
0.40
1.15/
0.75
1.30/
2.00
45/
17.0
55/
80.0
225/
175
500/
550
225/
175
750/
800
1/
5.0
mA
min
V
max
V
min
V
max
ms
min
ms
max
mV
min
mV
max
mV
min
mV
max
μA
max
0.10
1.22
1.22
50
50
350
Power On Reset
Delay
V
OUT
Low
Reset Threshold
V
OUT
High
Reset Threshold
Reset Output
Leakage
μP
mon
Input Current (Pin 4)
VμP
mon
= 5V
(T
dly
= 1.2 R
t
C
t
)
(Note 6)
(Note 6)
600
VμP
mon
= 5V, V
rst
= 12V
0.01
VμP
mon
= 2.4V
VμP
mon
= 0.4V
7.5
0.01
1.22
1.22
50
50
1.0
1.0
2
25/
25
10/
15
0.80/
0.80
2.00/
2.00
45/
30
55/
70
0.7/
0.4
1.3/
2.10
μA
max
μA
max
V
min
V
max
ms
min
ms
max
ms
min
ms
max
μs
μP
mon
Input
Threshold Voltage
μP Monitor Reset
Oscillator Period
μP Monitor Reset
Oscillator Pulse Width
Minimum μP Monitor
Input Pulse Width
Reset Fall Time
VμP
mon
= 0V
(T
window
= 0.82 R
t
C
mon
)
VμP
mon
= 0V
(RESET
pw
= 2000 C
mon
)
(Note 7)
R
rst
= 10k, V
rst
= 5V, C
rst
≤
10 pF
0.20
1.00/
1.00
μs
max
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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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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