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參數(shù)資料
| 型號(hào)： | LM2576D2T-12 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | EASY SWITCHER 3.0 A STEP.DOWN VOLTAGE REGULATOR |
| 中文描述： | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封裝： | D2PAK-5 |
| 文件頁數(shù)： | 8/26頁 |
| 文件大小： | 278K |
| 代理商： | LM2576D2T-12 |
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LM2576
http://onsemi.com
8
Figure 15. Typical Test Circuit
D1
MBR360
L1
100 H
Output
2
4
Feedback
C
out
1000 F
C
in
100 F
LM2576
Fixed Output
1
5
3
ON/OFF
GN
D
V
in
Load
V
out
D1
MBR360
L1
100 H
Output
2
4
Feedback
C
out
1000 F
C
in
100 F
LM2576
Adjustable
1
5
3
ON/OFF
GN
D
V
in
Load
V
out
5,000 V
Fixed Output Voltage Versions
Adjustable Output Voltage Versions
Vout
Vref
1.0
R2
R1
R2
R1
Vout
Vref
–1.0
Where V
ref
= 1.23 V, R1
between 1.0 k and 5.0 k
R2
R1
C
in
C
out
D1
L1
R1
R2
100 F, 75 V, Aluminium Electrolytic
1000 F, 25 V, Aluminium Electrolytic
Schottky, MBR360
100 H, Pulse Eng. PE92108
2.0 k, 0.1%
6.12 k, 0.1%
7.0 V 40 V
Unregulated
DC Input
7.0 V 40 V
Unregulated
DC Input
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
electromagnetic interferences (EMI) and affect the desired
operation. As indicated in the Figure 15, 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.
which
can
generate
On the other hand, the PCB area connected to the Pin 2
(emitter of the internal switch) of the LM2576 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
LM2576 regulator.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2576D2T-12 | EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGULATOR |
| LM2576R | 3.0A, 15V, Step-Down Switching Regulator |
| LM2577S-12 | Pressure Transducer, Series 19 mm, Uncompensated, Pressure Range: 0 psi to 100 psi, Absolute, flush mount, 10 Vdc excitation |
| LM2577N-ADJ | Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 200 psi, Absolute, flush mount with flange, 10 Vdc excitation |
| LM2577N-15 | Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 200 psi, Absolute, flush mount, 10 Vdc excitation |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2576D2T-15 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGULATOR |
| LM2576D2T-15G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 15V 3A 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 |
| LM2576D2T-3.3 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V 3A 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 |
| LM2576D2T-3.3G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V 3A 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 |
| LM2576D2T-5 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Easy Switcher 3.0A Step-Down Voltage Regulator |
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