- 您现在的位置：买卖IC网 > PDF目录80071 > LM2575S-12 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5 PDF资料下载
参数资料
| 型号： | LM2575S-12 |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封装： | TO-263, 5 PIN |
| 文件页数： | 2/18页 |
| 文件大小： | 449K |
| 代理商： | LM2575S-12 |
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
相关PDF资料 |
PDF描述 |
|---|---|
| LK1601-7ERD0TB1 | 1-OUTPUT 150 W AC-DC REG PWR SUPPLY MODULE |
| LT1074HVCV | 5.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSIP11 |
| LES010YE | 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
| LS1001-7PD3T | 1-OUTPUT AC-DC REG PWR SUPPLY MODULE |
| LS1001-9PD7T | 1-OUTPUT AC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2575S-12.TR | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Analog IC |
| LM2575S-12/NOPB | 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 |
| LM2575S-12TR | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1A & 3A Miniconverter Switching Regulators |
| LM2575S-15 | 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 |
| 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 |
发布紧急采购，3分钟左右您将得到回复。