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參數(shù)資料
| 型號(hào)： | LP4951CM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Adjustable Micropower Voltage Regulators |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 436K |
| 代理商： | LP4951CM |
Electrical Characteristics
LP4951C
Tested
Limit
(Note
3)
Parameter
Conditions
(Note 2)
Typ
Desgin
Limit
(Note
4)
Units
8-PIN VERSIONS ONLY
Reference Voltage
1.235
1.285
V max
V max
V min
Vmin
V max
V min
nA max
nA max
ppm/C
1.295
1.185
1.165
1.335
1.135
Reference Voltage
(Note 7)
Feedback Pin Bias
Current
20
40
60
Reference Voltage
Temperature Coefficient
Feedback Pin Bias
Current Temperature
Coefficient
Error Comparator
Output Leakage Current
(Note 12)
50
0.1
nA/C
V
OH
= 30V
0.01
1
μA max
μA max
mV max
mV max
mV min
mV min
mV max
mV max
mV
2
Output Low Voltage
V
IN
= 4.5V
I
OL
= 400μA
(Note 4)
150
250
400
Upper Threshold Voltage
60
40
25
Lower Threshold Voltage
(Note 6)
75
95
140
Hysteresis
Shutdown Input
Input Logic Voltage
(Note 6)
15
1.3
V
Low (Regulator ON)
High (Regulator OFF)
V
SHUTDOWN
= 2.4V
0.7
2.0
V max
V min
μA max
μA max
μA max
μA max
μA max
μA max
Shutdown Pin Input
Current
30
50
100
V
SHUTDOWN
= 30V
450
600
750
Regulator Output Current
in Shutdown
(Note 11)
3
10
20
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 2:
Unless otherwise specified all limits guaranteed for V
= 6V, I
= 100μA and C
= 1μF. Limits appearing in
boldface
type apply over the entire junction
temperature range for operation. Limits appearing in normal type apply for T
A
= T
J
= 25C. Additional conditions for the 8-pin versions are FEEDBACK tied to V
TAP
,
OUTPUT tied to SENSE (V
OUT
= 5V), and V
SHUTDOWN
≤
0.8V.
Note 3:
Guaranteed and 100% production tested.
Note 4:
Guaranteed but not 100% production tested. These limits are not used to calculate outgoing AQL levels.
Note 5:
Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V differential.
At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account.
Note 6:
Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage measured at V
IN
=
6V. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V
OUT
/V
REF
= (R1 + R2)/R2.For example, at a programmed
output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235V = 384 mV.Thresholds remain constant as a percent of
V
OUT
as V
OUT
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
Note 7:
V
REF
≤
V
OUT
≤
(V
IN
1V), 2.3V
≤
V
IN
≤
30V, 100μA
≤
I
L
≤
100mA, T
J
≤
T
JMAX
.
Note 8:
The junction-to-ambient thermal resistances are as follows: 180C/W and 160C/W for the TO-92 package with 0.40 inch and 0.25 inch leads to the printed
circuit board (PCB) respectively, 160C/W for the molded plastic SOP (M). The above thermal resistances for the M package apply when the package is soldered
directly to the PCB.
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP4951CM/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 |
| LP4951CMX | 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 |
| LP4951CMX/HAPB | 制造商:Texas Instruments 功能描述: |
| LP4951CMX/NAK2 | 制造商:Texas Instruments 功能描述: |
| LP4951CMX/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 |
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