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參數(shù)資料
| 型號(hào)： | SPX2941 |
| 英文描述： | 1A Low Dropout Adjustable Voltage Regulators(1A，可調(diào)低壓差穩(wěn)壓器) |
| 中文描述： | 1A低壓差可調(diào)穩(wěn)壓器（1A條，可調(diào)低壓差穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大?。?/td> | 154K |
| 代理商： | SPX2941 |
Rev. 10/24/00
SPX2941
APPLICATION HINTS
External Capacitors
A minimum capacitance of 22
μ
F and conditions on ESR (Equivalent
Series Resistance) must be met. The minimum value for the
capacitance is 22
μ
F and can be increased without limit. However the
ESR may cause loop instability if it is too high or too low. The
following graph shows the acceptable range for the ESR.
If the capacitor does not meet these requirements oscillation can
result.
ESR is specified only at room temperature. Therefore the designer
must ensure the proper behavior of the ESR over the temperature
range. ESR, for electrolytic capacitor, will increase by about 30X as
the temperature is reduced from 25
°
C to -40
°
C. Aluminum
electrolytic capacitors are not well suited for low temperature
operation.
Solid tantalum capacitors’ ESR are more stable over temperature, but
expensive. A cost-effective approach is then to put in parallel solid
tantalum and aluminum electrolytic capacitors in the ratio25/75%.
Thermal Consideration
Although the SPX2941 offers some limiting circuitry for overload
conditions, it is necessary not to exceed the maximum junction
temperature, and therefore to be careful about thermal resistance.
The heat flow will follow the lowest resistance path, which is the
Junction-to-case thermal resistance. In order to insure the best
thermal flow of the component, a proper mounting is required. Note
that the case of the device is electrically connected to the output. In
case the case has to be electrically isolated, a thermally conductive
spacer can be used. However do not forget to consider its
contribution to thermal resistance.
Output Capacitor ESR
E
)
1000
800
600
400
0
200
0.01
0.1
1
10
100
C
OUT
= 22
μ
F
V
O
= 5V
STABLE
REGION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SPX2945 | 500mA Low Drop Out Voltage Regulator with Shutdown（Output Programmable From 1.24V to 29V）(500mA，低壓差穩(wěn)壓器(帶關(guān)斷,可編程輸出從1.24V-29V)) |
| SPX2946 | 500mA Low Drop Out Voltage Regulator with Shutdown（Output Programmable From 1.24V to 29V）(500mA，低壓差穩(wěn)壓器(帶關(guān)斷,可編程輸出從1.24V-29V)) |
| SPX2947 | 500mA Low Drop Out Voltage Regulator with Shutdown（Output Programmable From 1.24V to 29V）(500mA，低壓差穩(wěn)壓器(帶關(guān)斷,可編程輸出從1.24V-29V)) |
| SPX2946T3-3.3 | 500mA Low Drop Out Voltage Regulator with Shutdown |
| SPX2946S-3.3 | 500mA Low Drop Out Voltage Regulator with Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPX2941_06 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable Output, Fast Response |
| SPX2941T5 | 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(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 |
| SPX2941T5/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(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 |
| SPX2941T5-L | 功能描述:低壓差穩(wěn)壓器 - LDO 3V-16V 1000mA 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 |
| SPX2941T5-L/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(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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