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參數(shù)資料
| 型號： | SPX2954 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 250 mA Low Dropout Voltage Regulator（Output Programmable From 1.24V to 29V）(250mA，低壓差穩(wěn)壓器（可編程輸出從1.24V-29V)) |
| 中文描述： | 250毫安低壓差穩(wěn)壓器（輸出可編程從兩種器件的29V）（250mA的，低壓差穩(wěn)壓器（可編程輸出從兩種器件- 29V）） |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 204K |
| 代理商： | SPX2954 |
Rev. 11/21/00
SPX2954
(Continued)
Parameter
Conditions
(Note 2)
Applies for SPX2954YT5-X, SPX2954YU5-X and SPX2954YS-X
Error Comparator
Output Leakage Current
V
OH
= 30V
Typical
SPX2954A
Min Max
SPX2954
Min Max
Units
0.01
100
2.00
250
400
-150
-100
230
160
100
2.00
250
400
-150
-100
230
160
μ
A
Output Low Voltage
V
IN
= 4.5V
I
OL
= 400
μ
A
(Note 8)
150
mV
Upper Threshold Voltage
240
-320
-380
-450
-640
-320
-380
-450
-640
mV
Lower Threshold Voltage
(Note 8)
350
mV
Hysteresis
(Note 8)
60
mV
Shutdown Input
V
SD
Output Turn-On
Threshold Voltage
1.155
1.140
1.305
1.320
1.155
1.140
1.305
1.320
V
mV
Hysteresis(HYST)
6
Input Bias Current(I
B
)
V
IN(SD)
= 0V to 5V
10
-30
-50
-30
-50
-30
-50
-30
-50
nA
Note 1:
Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.
Note 2:
Unless otherwise specified all limits are guaranteed for T
J
= 25
°
C, V
IN
= 6V, I
L
= 100
μ
A and C
L
= 1
μ
F. Additional conditions for the 8-pin versions are
feedback tied to 5V tap and output tied to output sense (V
OUT
= 5V) and V
SHUTDOWN
≤
0.8V.
Note 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.
Note 4
: Line regulation for the SPX2954 is tested at 150
°
C for I
L
= 1 mA. For I
L
= 100
μ
A and T
J
= 125
°
C, line regulation is guaranteed by design to 0.2%. See
typical performance characteristics for line regulation versus temperature and load current.
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:
V
REF
≤
V
OUT
≤
(V
IN
- 1V), 2.3
≤
V
IN
≤
30V, 100
μ
A
≤
I
L
≤
250 mA, T
J
≤
T
JMAX
.
Note 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
OUT
/V
REF
= (R
1
+ R
2
)/R
2
. 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
OUT
as
V
OUT
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
Note 8:
V
SHUTDOWN
≥
2V, V
IN
≤
30V, V
OUT
=0, feedback pin tied to 5V Tap.
Note 9:
The junction -to-ambient thermal resistance of the TO-92 package is 180
°
C/ W with 0.4” leads and 160
°
C/ W with 0.25” leads to a PC board.
The thermal resistance of the 8-Pin DIP package is 105
°
C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient thermal resistance for the
SOIC (S) package is 160
°
C/W.
SPX2954 Block Diagram
FEEDBACK
INPUT
OUTPUT
UNREGULATED DC
SHUTDOWN
GROUND
ERROR
______
5V TAP
SENSE
5V @ 250mA
MAX
TO CMOS OR
TTL
REFERENCE
ERROR
COMPARATOR
ERROR
AMPLIFIER
1.23V
FROM
CMOS OR
TTL
+
+
_
+
+
+
+
60 mV
3
7
8
1
2
6
5
4
..
60k
330k
180k
..
..
..
1 F
_
V
O
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SPX2954_05 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
| SPX2954AM3-3.3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250 mA Low Drop Out Voltage Regulator |
| SPX2954AM3-3-3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
| SPX2954AM3-5.0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250 mA Low Drop Out Voltage Regulator |
| SPX2954AM3-5-0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
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