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參數(shù)資料
| 型號(hào)： | LP3872ES-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 1.5A Fast Ultra Low Dropout Linear Regulators |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.55 V DROPOUT, PSSO5 |
| 封裝： | TO-263, 5 PIN |
| 文件頁(yè)數(shù)： | 13/18頁(yè) |
| 文件大?。?/td> | 745K |
| 代理商： | LP3872ES-5.0 |
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Application Hints
(Continued)
SENSE PIN
In applications where the regulator output is not very close to
the load, LP3875 can provide better remote load regulation
using the SENSE pin.
Figure 2
depicts the advantage of the
SENSE option. LP3872 regulates the voltage at the output
pin. Hence, the voltage at the remote load will be the regu-
lator output voltage minus the drop across the trace resis-
tance. For example, in the case of a 3.3V output, if the trace
resistance is 100m
, the voltage at the remote load will be
3.15V with 1.5Aof load current, I
. The LP3875 regulates
the voltage at the sense pin. Connecting the sense pin to the
remote load will provide regulation at the remote load, as
shown in
Figure 2
. If the sense option pin is not required, the
sense pin must be connected to the V
OUT
pin.
SHUTDOWN OPERATION
A CMOS Logic level signal at the shutdown ( SD) pin will
turn-off the regulator. Pin SD must be actively terminated
through a 10k
pull-up resistor for a proper operation. If this
pin is driven from a source that actively pulls high and low
(such as a CMOS rail to rail comparator), the pull-up resistor
is not required. This pin must be tied to Vin if not used.
20063307
FIGURE 1. Error Flag Operation
20063308
FIGURE 2. Improving remote load regulation using LP3875
L
www.national.com
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP3872 | 1.5A Fast Ultra Low Dropout Linear Regulators |
| LP3873 | 3A Fast Ultra Low Dropout Linear Regulators |
| LP3873ES-1.8 | 3A Fast Ultra Low Dropout Linear Regulators |
| LP3873ES-2.5 | 3A Fast Ultra Low Dropout Linear Regulators |
| LP3873ES-3.3 | 3A Fast Ultra Low Dropout Linear Regulators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3872ESX-1.8 | 功能描述:低壓差穩(wěn)壓器 - 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3872ESX-1.8/NOPB | 功能描述:低壓差穩(wěn)壓器 - 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3872ESX-2.5 | 功能描述:低壓差穩(wěn)壓器 - 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3872ESX-2.5/NOPB | 功能描述:低壓差穩(wěn)壓器 - 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3872ESX-3.3 | 功能描述:低壓差穩(wěn)壓器 - 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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