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參數(shù)資料
| 型號(hào)： | NCV551SN28T1 |
| 廠(chǎng)商： | ON SEMICONDUCTOR |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | AC 5C 5#16S PIN RECP |
| 中文描述： | 2.8 V FIXED POSITIVE LDO REGULATOR, 0.15 V DROPOUT, PDSO5 |
| 封裝： | SC-59, SOT-23, TSOP-5 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大小： | 89K |
| 代理商： | NCV551SN28T1 |
NCP551, NCV551
http://onsemi.com
9
Output
R
1
2
3
5
4
Input
1.0 F
1.0 F
Output
1
2
3
5
4
Input
1.0 F
1.0 F
Q2
Q1
R3
R1
R2
Output
1
2
3
5
4
Input
1.0 F
1.0 F
Output
1
2
3
5
4
Enable
1.0 F
1.0 F
C
Output
1
2
3
5
4
Input
1.0 F
1.0 F
Q1
R
11 V
Figure 21. Current Boost Regulator
Figure 22. Current Boost Regulator with
Short Circuit Limit
Figure 23. Delayed Turnon
Figure 24. Input Voltages Greater than 12 V
A regulated output can be achieved with input voltages that
exceed the 12 V maximum rating of the NCP551 series with
the addition of a simple preregulator circuit. Care must be
taken to prevent Q1 from overheating when the regulated
output (V
out
) is shorted to GND
.
The NCP551 series can be current boosted with a PNP transis-
tor. Resistor R in conjunction with V
BE
of the PNP determines
when the pass transistor begins conducting; this circuit is not
short circuit proof. Input/Output differential voltage minimum is
increased by V
BE
of the pass resistor.
Short circuit current limit is essentially set by the V
BE
of Q2 and
R1. I
SC
= ((V
BEQ2
ib * R2) / R1) + I
O(max) Regulator
If a delayed turnon is needed during power up of several volt-
ages then the above schematic can be used. Resistor R, and
capacitor C, will delay the turnon of the bottom regulator.
Q1
R
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV551SN28T1G | 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 100mA w/Enable 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV551SN30T1 | 功能描述:低壓差穩(wěn)壓器 - LDO 3.0V 100mA w/Enable 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV551SN30T1G | 功能描述:低壓差穩(wěn)壓器 - LDO 3.0V 100mA w/Enable 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV551SN31T1G | 功能描述:低壓差穩(wěn)壓器 - LDO 3.1V CMOS 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV551SN32T1 | 功能描述:低壓差穩(wěn)壓器 - LDO 3.2V 100mA w/Enable 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(lèi)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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