參數(shù)資料
型號： LM2575T-012G
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, SFM5
封裝： LEAD FREE, CASE 314D-04, TO-220, 5 PIN
文件頁數(shù)： 26/28頁
文件大?。?/td> 492K
代理商： LM2575T-012G
LM2575, NCV2575
http://onsemi.com
7
Figure 14. Typical Test Circuit
D1
1N5819
L1
330
mH
Output
2
4
Feedback
Cout
330
mF
/16 V
Cin
100
mF/50 V
LM25755
1
5
3ON/OFF
GND
Vin
Load
Vout
Regulated
Output
Vin
Unregulated
DC Input
8.0 V - 40 V
D1
1N5819
L1
330
mH
Output
2
4
Feedback
Cout
330
mF
/16 V
Cin
100
mF/50 V
LM2575
Adjustable
1
5
3ON/OFF
GND
Vin
Load
Vout
Regulated
Output
Unregulated
DC Input
8.0 V - 40 V
5.0 Output Voltage Versions
Adjustable Output Voltage Versions
Vout + Vref 1 )
R2
R1
R2
+ R1
Vout
V
ref
1
Where Vref = 1.23 V, R1
between 1.0 k
W and 5.0 kW
R2
R1
+
-
+
-
PCB LAYOUT GUIDELINES
As in any switching regulator, the layout of the printed
circuit board is very important. Rapidly switching currents
associated with wiring inductance, stray capacitance and
parasitic inductance of the printed circuit board traces can
generate
voltage
transients
which
can
generate
electromagnetic interferences (EMI) and affect the desired
operation. As indicated in the Figure 14, to minimize
inductance and ground loops, the length of the leads
indicated by heavy lines should be kept as short as possible.
For best results, singlepoint grounding (as indicated) or
ground plane construction should be used.
On the other hand, the PCB area connected to the Pin 2
(emitter of the internal switch) of the LM2575 should be
kept to a minimum in order to minimize coupling to sensitive
circuitry.
Another sensitive part of the circuit is the feedback. It is
important to keep the sensitive feedback wiring short. To
assure this, physically locate the programming resistors near
to the regulator, when using the adjustable version of the
LM2575 regulator.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2575T-015 功能描述:直流/直流開關(guān)調(diào)節(jié)器 15V 1A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2575T-015G 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:1.0 A, Adjustable Output Voltage, Step−Down Switching Regulator
LM2575T12 制造商:Semtech 功能描述:_
LM2575T-12 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM2575T-12 LF03 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 4V to 40V 5-Pin(5+Tab) TO-220 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4V to 40V 5-Pin(5+Tab) TO-220
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