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参数资料
| 型号： | LM2575T-ADJ |
| 厂商： | MOTOROLA INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSFM5 |
| 封装： | 314D-03 |
| 文件页数： | 26/28页 |
| 文件大小： | 380K |
| 代理商： | LM2575T-ADJ |
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LM2575
7
MOTOROLA ANALOG IC DEVICE DATA
Figure 14. Typical Test Circuit
D1
1N5819
L1
330
H
Output
2
4
Feedback
Cout
330
F
/16 V
Cin
100
F/50 V
LM2575–5
1
5
3ON/OFF
Gnd
Vin
Load
Vout
Regulated
Output
Vin
Unregulated
DC Input
8.0 V – 40 V
D1
1N5819
L1
330
H
Output
2
4
Feedback
Cout
330
F
/16 V
Cin
100
F/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
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.
相关PDF资料 |
PDF描述 |
|---|---|
| LM2575T-5.0 | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| LM2575D2T-3.3 | 3.2 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575TV-5.0 | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PZFM5 |
| LM2575T-3.3 | 3.2 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSFM5 |
| LM2575TV-ADJ | 3.2 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PZFM5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2575T-ADJ | 制造商:Texas Instruments 功能描述:SWITCHING REG 1A ADJ 2575 TO2205 |
| LM2575T-ADJ/LB02 | 制造商:Texas Instruments 功能描述:SIMPLE SWITCHER 1A -40/+125 #01202511 |
| LM2575T-ADJ/LB03 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2575T-ADJ/LF02 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2575T-ADJ/LF03 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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