- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄223349 > AP1184S7LA 4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator PDF資料下載
參數(shù)資料
| 型號： | AP1184S7LA |
| 英文描述： | 4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator |
| 中文描述： | 第4A超低壓差積極可調(diào)或固定模式調(diào)節(jié) |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 236K |
| 代理商： | AP1184S7LA |
4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator
AP1184
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Sep 7, 2004
5/11
Functional Descriptions(Continued)
Vout = Vref (1+R2/R1) + Iadj * R2 where : Vref = 1.25V & Iadj=50uA Typically
AP1184-ADJ
Vin
Vctrl
Adj
Vout
Vsense
R1+
R2+
Vref
Iadj=50uA
The AP1184-ADJ keeps a constant 1.25V between
the Vsense pin and the Adj pin. By placing a
resistor R1 across these two pins and connecting
the Vsense ans Vout pin together, a constant
current flows through R1, adding to the Iadj current
and into the R2 resistor producing a voltage equal
to the (1.25/R1)*R2 + Iadj*R2. This voltage is then
added to the 1.25V to set the output voltage. This is
summarized in the above equation. Since the
minimum
load
current
requirement
of
the
AP1184-ADJ is 10mA, R1 is typically selected to be
a 121Ω resistor so that it automatically satisfies
this condition. Notice that since the Iadj is typically
in the range of 50uA it only adds a small error to the
output voltage and should be considered when very
precise output voltage setting is required.
Load Regulation
Since the AP1184 has separate pins for the output
(Vout) and the sense (Vsense), it is ideal for
providing true remote sensing of the output voltage
at the load. This means that the voltage drops due
to parasitic resistance such as PCB traces between
the regulator and the load are compensated for
using remote sensing. Figure following shows a
typical application of the AP1184-ADJ with remote
sensing.
AP1184-ADJ
Vin
Vctrl
Vin
Vctrl
Vout
Vsense
Adj
R1
R2
R
L
Stability
The AP1184-XXX requires the use of an output
capacitor as part of the frequency compensation in
order to make the regulator stable. Typical designs
for the microprocessor applications use standard
electrolytic capacitors with typical ESR in the range
of 50 to 100mΩ and an output capacitance of
100uF to 1000uF. Fortunately as the capacitance
increases, the ESR decreases resulting in a fixed
RC
time
constant. The
AP1184-XXX takes
advantage of the phenomena in making the overall
regulator loop stable. For most applications a
minimum of 100uF aluminum electrolytic capacitor
insures both stability and good transient response.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AP5S-FREQ-I-B | CRYSTAL OSCILLATOR, CLOCK, 10 MHz - 200 MHz, HCMOS/TTL OUTPUT |
| AP5S1-FREQ-L-H-T | CRYSTAL OSCILLATOR, CLOCK, 10 MHz - 166 MHz, HCMOS/TTL OUTPUT |
| AP5S-FREQ-D-H-T | CRYSTAL OSCILLATOR, CLOCK, 10 MHz - 200 MHz, HCMOS/TTL OUTPUT |
| AP5S1-FREQ-F-B | CRYSTAL OSCILLATOR, CLOCK, 10 MHz - 166 MHz, HCMOS/TTL OUTPUT |
| AP5S-FREQ1-R-B-T | CRYSTAL OSCILLATOR, CLOCK, 10 MHz - 133 MHz, HCMOS/TTL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AP1184S-L-13 | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR |
| AP1184S-L-U | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR |
| AP1184T5 | 功能描述:低壓差穩(wěn)壓器 - LDO ADJV 4.0A 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(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 |
| AP1184T515 | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator |
| AP1184T515A | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。