參數(shù)資料
型號(hào)： LM2575D2T-12
廠商： MOTOROLA INC
元件分類： 穩(wěn)壓器
英文描述： EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR
中文描述： 3.2 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSSO5
封裝： PLASTIC, D2PAK-5
文件頁(yè)數(shù)： 7/28頁(yè)
文件大小： 382K
代理商： LM2575D2T-12
LM2575
7
MOTOROLA ANALOG IC DEVICE DATA
Figure 14. Typical Test Circuit
D1
1N5819
L1
330
μ
H
Output
2
4
Feedback
Cout
330
μ
F
/16 V
Cin
100
μ
F/50 V
LM2575–5
1
5
3
ON/OFF
Gnd
Vin
Load
Vout
Regulated
Output
Vin
Unregulated
DC Input
8.0 V – 40 V
D1
1N5819
L1
330
μ
H
Output
2
4
Feedback
Cout
330
μ
F
/16 V
Cin
100
μ
F/50 V
LM2575
Adjustable
1
5
3
ON/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
Vref
– 1
Where Vref = 1.23 V, R1
between 1.0 k
and 5.0 k
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, single–point 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.
相關(guān)PDF資料
PDF描述
LM2576-12 Easy Switcher 3.0A Step-Down Voltage Regulator
LM2576-15 Easy Switcher 3.0A Step-Down Voltage Regulator
LM2576-3.3 Easy Switcher 3.0A Step-Down Voltage Regulator
LM2576-5 Easy Switcher 3.0A Step-Down Voltage Regulator
LM2576-ADJ Easy Switcher 3.0A Step-Down Voltage Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2575D2T-12R4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 12V 1A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
LM2575D2T-12R4G 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 12V 1A Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
LM2575D2T-15 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR
LM2575D2T-15R 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1.0 A Adjustable Output Voltage Step-Down Switching Regulator(244.52 k)
LM2575D2T-15R4 功能描述:直流/直流開(kāi)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(kāi)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
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