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參數(shù)資料
| 型號： | SPX3940AT-5.0 |
| 英文描述： | 1A Low Drop Out Voltage Regulator |
| 中文描述： | 1A低壓降穩(wěn)壓器 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 169K |
| 代理商： | SPX3940AT-5.0 |
Rev. 12/19/00
SPX3940/41/42
(Continued)
PARAMETER
CONDITIONS
(Note 2)
Output Leakage Current
V
0H
= 30V
0.01
Typ.
SPX3940/42
Min Max
UNITS
1.00
2.00
250
400
μ
A
Output Low Voltage
V
IN
= 4.5V
I
0L
= 400
μ
A
(Note 8)
150
mV
Upper Threshold Voltage
60
40
25
mV
Lower Threshold Voltage
(Note 8)
75
95
140
0.7
90
150
800
1000
15
25
mV
Hysteresis
Input logic Voltage
(Note 8)
Low (Regulator ON)
High (Regulator OFF)
V
S
= 2.4V
V
S
= 30V
15
1.3
30
450
mV
V
2.0
Shut down Pin Input Current
μ
A
Regulator Output Current in
Shutdown
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 SPX3940/41/42 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
≤
(Vin - 1V), 2.3
≤
Vin
≤
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
= (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/1.235 = 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.
3
μ
A
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SPX3940AT-L-1-8 | 功能描述:低壓差穩(wěn)壓器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| SPX3940AT-L-1-8/TR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| SPX3940AT-L-1-8TR | 制造商:EXAR 制造商全稱:EXAR 功能描述:1A Low Dropout Voltage Regulator |
| SPX3940AT-L-2-5 | 功能描述:低壓差穩(wěn)壓器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| SPX3940AT-L-2-5/TR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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