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| 型號(hào)： | LM2575S-12T |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封裝： | TO-263, 5 PIN |
| 文件頁數(shù)： | 2/18頁 |
| 文件大小： | 449K |
| 代理商： | LM2575S-12T |
1.0 & 3.0 AMP MINICONVERTER
SWITCHING REGULATORS
LM2575
LM2576
1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
April 7, 1998
10
TYPICAL APPLICATION - BUCK MODE
The above component selections will be adequate for
most applications for output currents from 250mA to
3.0A (LM2576) or 150mA to 1.0A (LM2575). Applica-
tions with V
OUT below 5V or above 24V may require
component adjustment for maximum performance;
please contact factory for application assistance.
1. DEVICE SELECTION. Select an appropriate device
from the “Ordering Information” guide based upon volt-
age option and package.
2. THERMAL CONDITIONS. Most applications will not
require a heatsink for the TO-220 package. Approxi-
mate power dissipation is:
3. CATCH DIODE. If the output must be capable of a
sustained short, the I
F rating must be above 3A for the
LM2575 and 7A for the LM2576. The use of an ultra
fast diode with soft recovery characteristics or a Schot-
tky will be adequate. The major impact on Schottky
versus an ultra fast is efficiency. Schottkys will provide
approximately 4% to 5% improvement for V
OUTS below
12V, whereas above 12V the difference will become
less significant. Breakdown rating must be in excess of
V
IN for margin.
4. INPUT CAPACITOR. The value shown will be ade-
quate for most applications. Ripple voltage at the
switching frequency is caused by the input capacitor
supplying load current during the on time of the power
switch. The use of a low ESR switching type capacitor
will minimize ripple to an acceptable level.
IN
O
IN
SAT
O
V
02
.
0
V
I
V
P
+
=
LM2575 LM2576
L
1
330H
100H
D
1
3A
7A
C
IN
68F
120F
C
OUT
330F
1,000F
LM2575 LM2576
L
1
330H
100H
D
1
3A
7A
C
IN
68F
120F
C
OUT
330F
1,000F
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2576S-3.3 | 7.5 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2576S-5.0 | 7.5 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575T-12EP | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, SFM5 |
| LM2575HVM-12EP | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575HVSX-5.0EP | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2575S-12TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1A & 3A Miniconverter Switching Regulators |
| LM2575S-15 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| LM2575S-15 NOPB | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 4V to 40V 6-Pin(5+Tab) TO-263 |
| LM2575S-15/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| LM2575S-3.3 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
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