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參數(shù)資料
| 型號： | LM2575-3.3BWM |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 52kHz Simple 1A Buck Regulator |
| 中文描述： | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | SOIC-24 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 195K |
| 代理商： | LM2575-3.3BWM |
www.ti.com
APPLICATION INFORMATION
Layout Guidelines
With any switching regulator, circuit layout plays an important role in circuit performance. Wiring and parasitic
inductances, as well as stray capacitances, are subjected to rapidly switching currents, which can result in
unwanted voltage transients. To minimize inductance and ground loops, the length of the leads indicated by
heavy lines should be minimized. Optimal results can be achieved by single-point grounding (see
Figure 2
) or by
ground-plane construction. For the same reasons, the two programming resistors used in the adjustable version
should be located as close as possible to the regulator to keep the sensitive feedback wiring short.
LM2575-xx
Fixed Output
C
IN
100
μ
F
+
+V
IN
1
3
GND
5
D1
2
L1
330
μ
H
C
OUT
330
μ
F
+
4
L
O
A
D
V
OUT
V
IN
Unregulated
DC Input
C
IN
= 100
μ
F, Aluminum Electrolytic
C
OUT
= 330
μ
F, Aluminum Electrolytic
D1 = Schottky
L1 = 330
μ
H
Fixed Output Voltage Versions
LM2575
(ADJ)
C
IN
100
μ
F
+
+V
IN
1
3
GND
5
ON/OFF
D1
11DQ06
OUTPUT
2
L1
330
μ
H
C
OUT
330
μ
F
+
FEEDBACK
4
L
O
A
D
V
OUT
7-V to 60-V
Unregulated
DC Input
Adjustable Output Voltage Versions
V
OUT
= V
REF
(1 + R2/R1) = 5 V
Where,
V
REF
= 1.23 V
R1 = 2 k
R2 = 6.12 k
R2
R1
ON/OFF
OUTPUT
FEEDBACK
LM2575
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
SLVS569D–JANUARY 2005–REVISED JULY 2005
A.
Pin numbers are for the KTT (TO-263) package.
Figure 2. Test Circuit and Layout Guidelines
7
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| LM2575-5.0BT | 52kHz Simple 1A Buck Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2575-33IKC | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
| LM2575-33IKTGR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
| LM2575-33IKTT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
| LM2575-33IKTTR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
| LM2575-33IN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
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