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參數(shù)資料
| 型號： | LM2984MDC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| 封裝： | DIE |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 317K |
| 代理商： | LM2984MDC |
Electrical Characteristics (Continued)
VIN e 14V IOUT e 5 mA Ibuf e 5 mA Istby e 5 mA Rt e 130k Ct e 033 mF Cmon e 047 mF Tj e 25 C (Note 6) unless
otherwise specified
Tested
Design
Parameter
Conditions
Typical
Limit
Units
(Note 2)
(Note 3)
Computer MonitorReset Functions
Ireset Low
VIN e 4V Vrst e 04V
5
2
1
mAmin
Vreset Low
VIN e 4V Irst e 1 mA
010
040
Vmax
Rt voltage
(Pin 2)
122
115
Vmin
122
130
Vmax
Power On Reset
VmPmon e 5V
50
45
msmin
Delay
(Tdly e 12 Rt Ct)
50
55
msmax
VOUT Low
(Note 4)
400
360
Vmin
Reset Threshold
400
440
Vmax
VOUT High
(Note 4)
550
525
Vmin
Reset Threshold
550
600
Vmax
Reset Output
VmPmon e 5V Vrst e 12V
001
1
m
Amax
Leakage
m
Pmon Input
VmPmon e 24V
75
25
m
Amax
Current (Pin 4)
VmPmon e 04V
001
10
m
Amax
m
Pmon Input
122
080
Vmin
Threshold Voltage
122
200
Vmax
m
P Monitor Reset
VmPmon e 0V
50
45
msmin
Oscillator Period
(Twindow e 082 RtCmon)
50
55
msmax
m
P Monitor Reset
VmPmon e 0V
10
07
05
msmin
Oscillator Pulse Width
(RESETpw e 2000 Cmon)
10
13
20
msmax
Minimum mP Monitor
(Note 5)
2
m
smax
Input Pulse Width
Reset Fall Time
Rrst e 10k Vrst e 5V Crst s 10 pF
020
100
m
smax
Reset Rise Time
Rrst e 10k Vrst e 5V Crst s 10 pF
060
100
m
smax
OnOff Switch Input
VON e 24V
75
25
m
Amax
Current (Pin 8)
VON e 04V
001
10
m
Amax
OnOff Switch Input
122
080
Vmin
Threshold Voltage
122
200
Vmax
Note 1
Thermal resistance without a heatsink for junction-to-case temperature is 3 CW Thermal resistance case-to-ambient is 40 CW
Note 2
Tested Limits are guaranteed and 100% production tested
Note 3
Design Limits are guaranteed (but not 100% production tested) over the indicated temperature and supply voltage range These limits are not used to
calculate outgoing quality levels
Note 4
An internal comparator detects when the main regulator output (VOUT) drops below 40V or rises above 55V If either condition exists at the output the
Reset Error Flag is held low until the error condition has terminated The Reset Error Flag is then allowed to go high again after a delay set by Rt and Ct (See
Applications Section)
Note 5
This parameter is a measure of how short a pulse can be detected at the mP Monitor Input This parameter is primarily influenced by the value of Cmon
(See Typical Performance Characteristics and Applications Section)
Note 6
To ensure constant junction temperature low duty cycle pulse testing is used
5
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