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参数资料
| 型号： | LM25574Q0MT |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO16 |
| 封装： | TSSOP-16 |
| 文件页数： | 1/20页 |
| 文件大小： | 394K |
| 代理商： | LM25574Q0MT |
October 16, 2008
LM25574Q0
SIMPLE SWITCHER 42V, 0.5A Step-Down Switching
Regulator
General Description
The LM25574Q0 is an easy to use SIMPLE SWITCHER
buck regulator which allows design engineers to design and
optimize a robust power supply using a minimum set of com-
ponents. Operating with an input voltage range of 6 - 42V, the
LM25574Q0 delivers 0.5A of continuous output current with
an integrated 750m
N-Channel MOSFET. The regulator uti-
lizes an Emulated Current Mode architecture which provides
inherent line regulation, tight load transient response, and
ease of loop compensation without the usual limitation of low-
duty cycles associated with current mode regulators. The
operating frequency is adjustable from 50kHz to 1MHz to al-
low optimization of size and efficiency. To reduce EMI, a
frequency synchronization pin allows multiple IC’s from the
LM(2)557x family to self-synchronize or to synchronize to an
external clock. The LM25574Q0 guarantees robustness with
cycle-by-cycle current limit, short-circuit protection, thermal
shut-down, and remote shut-down. The device is available in
a TSSOP-16 package. The LM25574Q0 is supported by the
full suite of WEBENCH On-Line design tools.
Features
■ LM25574Q0 is an Automotive Grade product that is AEC-
Q100 grade qualified
■ 40°C to + 150°C operating junction temperature
■ Integrated 42V, 750m N-channel MOSFET
■ Ultra-wide input voltage range from 6V to 42V
■ Adjustable output voltage as low as 1.225V
■ 1.65% feedback reference accuracy
■ Operating frequency adjustable between 50kHz and
1MHz with single resistor
■ Master or slave frequency synchronization
■ Adjustable soft-start
■ Emulated current mode control architecture
■ Wide bandwidth error amplifier
■ Built-in protection
Package
■ TSSOP-16
Applications
■ Automotive
■ Industrial
Simplified Application Schematic
30071001
WEBENCH is a registered trademark of National Semiconductor Corporation.
2008 National Semiconductor Corporation
300710
www.national.com
LM25574Q0
SIMPLE
SWITCHER
42V,
0.5A
Step-Down
Switching
Regulator
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| LM25574Q0MTX | SWITCHING REGULATOR, PDSO16 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM25574Q0MT/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 |
| LM25574Q0MTX | 制造商:TI 制造商全称:Texas Instruments 功能描述:LM25574/LM25574-Q1 SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator |
| LM25574Q0MTX/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 |
| LM25574-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LM25574/LM25574-Q1 SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator |
| LM25574QMT | 制造商:TI 制造商全称:Texas Instruments 功能描述:LM25574/LM25574-Q1 SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator |
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