參數(shù)資料
型號(hào): LM2574BWM
廠商: MICREL INC
元件分類: 穩(wěn)壓器
英文描述: SWITCH PB SPST-NO MOM 3A RED
中文描述: 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO14
封裝: SOIC-14
文件頁數(shù): 21/24頁
文件大小: 397K
代理商: LM2574BWM
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.
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LM2574DW 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:0.5 A, Adjustable Output Voltage, Step-Down Switching Regulator
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