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參數(shù)資料
| 型號： | SPX2954AS-5.0 |
| 英文描述： | CABLE ASSEMBLY; LEAD-FREE SOLDER; 10-32 MALE TO BNC MALE; 50 OHM, RG174A/U COAX |
| 中文描述： | 250毫安低壓差穩(wěn)壓器 |
| 文件頁數(shù)： | 3/17頁 |
| 文件大?。?/td> | 178K |
| 代理商： | SPX2954AS-5.0 |
3
Rev. 3/6/03
SP2954 250mA Low Dropout Voltage Regulator
Copyright 2003 Sipex Corporation
ELECTRICAL CHARACTERISTICS (Cont.)
V
IN
=V
O
+1V, I
L
=100
μ
A, C
L
=1
μ
F (
NOTE
2), T
A
= 25
°
C, unless otherwise specified.
N
OTE
1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided
by the total temperature range.
N
OTE
2: Unless otherwise specified all limits guaranteed for T
= 25
°
C, V
= 6V, I
= 100
μ
A and C
= 1
μ
F.
Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense
(V
= 5V) and V
≤
0.8V.
N
OTE
3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered under the specification for thermal
regulation.
N
OTE
4: Line regulation for the SPX2954 is tested at I
= 1mA.
N
OTE
5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV
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.
N
OTE
6: V
≤
V
≤
(V
- 1V), 2.3
≤
V
≤
30V, 100
μ
A
≤
I
≤
250mA, T
≤
T
.
N
OTE
7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below
the nominal reference voltage measured at 6V input. To express these thresholds in terms of output
voltage change, multiply by the error amplifier gain = V
/V
= (R
+ R
)/R
. 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/1.235 = 384 mV. Thresholds remain constant as a percent of V
as V
OUT
is varied, with the
dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
N
OTE
8: V
SHUTDOWN
≥
2V, V
IN
≤
30V, V
OUT
=0, Feedback pin tied to 5V/3.3V Tap.
SPX2954A
MIN.
TYP.
SPX2954
MIN.
TYP. MAX.
PARAMETER
Error Comparator
Output Leakage Current
Output Low Voltage
CONDITIONS
MAX
UNIT
V
OH
= 30V
V
IN
= V
-0.5V,
I
OL
= 400
μ
A
(N
OTE
7)
(N
OTE
7)
(N
OTE
7)
0.01
1
0.01
1
μ
A
150
60
75
15
250
150
60
75
15
250
mV
mV
mV
mV
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Shutdown
Input logic Voltage
40
40
95
95
Low (Regulator ON)
High (Regulator OFF)
VS = 2.4V
VS= 30V
(N
OTE
8)
1.3
0.7
1.3
0.7
V
2.0
2.0
Shutdown Input Current
30
400
3
50
800
10
30
400
3
50
800
10
μ
A
Regulator Output Current
in Shutdown
μ
A
SPX2954 Block Diagram, 8 Lead 5V Version
INPUT
OUTPUT
UNREGULATED DC
SHUTDOWN
GROUND
ERROR
______
SENSE
TO CMOS OR
TTL
REFERENCE
ERROR DETECTION
COMPARATOR
ERROR
AMPLIFIER
1.23V
FROM
CMOS OR
TTL
+
+
_
+
+
+
+
60 mV
3
7
8
1
2
6
5
4
60k
330k
180k
.
.
1
μ
F
_
FEEDBACK
5V TAP
5V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SPX2954AT3-5.0 | 250 mA Low Drop Out Voltage Regulator |
| SPX2954S-3.3 | 250mA Low Dropout Voltage Regulator |
| SPX2954S-5.0 | 250 mA Low Drop Out Voltage Regulator |
| SPX2954AM3-3.3 | 250 mA Low Drop Out Voltage Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPX2954AS-L-3-3 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SPX2954AS-L-5-0 | 功能描述:低壓差穩(wěn)壓器 - LDO 250mA LOW DROPOUT 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| SPX2954AS-L-5-0/TR | 功能描述:低壓差穩(wěn)壓器 - LDO 250mA LOW DROPOUT 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| SPX2954AT-3.3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
| SPX2954AT-3-3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
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