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參數(shù)資料
| 型號： | LM2574N-12 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| 中文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 21/24頁 |
| 文件大小： | 397K |
| 代理商： | LM2574N-12 |
LM2574
21
MOTOROLA ANALOG IC DEVICE DATA
D1
1N5819
L1
150
μ
H
Output
7
1
Feedback
R2
50 k
R1
1.1 k
L2
20
μ
H
Output
Voltage
1.2 to 35 V @ 0.5 A
Optional Output
Ripple Filter
40 V Max
Unregulated
DC Input
Cout
1000
μ
F
C1
100
μ
F
Cin
22
μ
F
LM2574–ADJ
5
3
4
ON/OFF
Pwr
Gnd
+Vin
2
Sig
Gnd
Figure 35. 1.2 to 35 V Adjustable 500 mA Power Supply with Low Output Ripple
The LM2574–5 Step–Down Voltage Regulator with 5.0 V @ 0.5 A Output Power Capability.
Typical Application With Through–Hole PC Board Layout
D1
1N5819
L1
330
μ
H
Output
7
1
Feedback
Unregulated
DC Input
+Vin = 7.0 to 40 V
C2
220
μ
F
C1
22
μ
F
LM2574–5
5
3
4
ON/OFF
Pwr
Gnd
+Vin
Regulated Output
+Vout = 5.0 V @ 0.5 A
Gnd
Gnd
C1
C2
D1
L1
–
–
–
–
22
μ
F, 63 V, Aluminium Electrolytic
220
μ
F, 16 V, Aluminium Electrolytic
1.0 A, 40 V, Schottky Rectifier, 1N5819
330
μ
H, RL–1284–330, Renco Electronics
2
Sig
Gnd
Figure 36. Schematic Diagram of the LM2574–5 Step–Down Converter
LM2574–5.0
C1
C2
+
U1
L1
D1
Vout
Gnd
Gnd
+Vin
Figure 37. PC Board Layout Component Side
NOTE
: Not to scale.
Figure 38. PC Board Layout Copper Side
NOTE
: Not to scale.
相關PDF資料 |
PDF描述 |
|---|---|
| LM2574M-12 | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| LM2574N-ADJ | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| LM2574N-5.0 | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| LM2574HVM-ADJ | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| LM2574HVM-5.0 | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2574N-12 NOPB | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 4V to 40V 8-Pin PDIP Rail |
| LM2574N12 | 制造商:Texas Instruments 功能描述:SWITCHING REG 0.5A 12V 2574 DIP8 |
| LM2574N-12/NOPB | 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2574N-12G | 功能描述:直流/直流開關調(diào)節(jié)器 12V 500mA Buck PWM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM2574N-15 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:EASY SWITCHER 0.5 A STEP-DOWN VOLTAGE REGULATOR |
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