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参数资料
| 型号： | LM2675M-12X |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SOIC-8 |
| 文件页数： | 1/26页 |
| 文件大小： | 920K |
| 代理商： | LM2675M-12X |
LM2675
SIMPLE SWITCHER Power Converter High Efficiency
1A Step-Down Voltage Regulator
General Description
The LM2675 series of regulators are monolithic integrated
circuits built with a LMDMOS process. These regulators
provide all the active functions for a step-down (buck)
switching regulator, capable of driving a 1A load current with
excellent line and load regulation. These devices are avail-
able in fixed output voltages of 3.3V, 5.0V, 12V, and an
adjustable output version.
Requiring a minimum number of external components, these
regulators are simple to use and include patented internal
frequency compensation (Patent Nos. 5,382,918 and
5,514,947) and a fixed frequency oscillator.
The LM2675 series operates at a switching frequency of
260 kHz, thus allowing smaller sized filter components than
what would be needed with lower frequency switching regu-
lators. Because of its very high efficiency (>90%), the cop-
per traces on the printed circuit board are the only heat
sinking needed.
A family of standard inductors for use with the LM2675 are
available from several different manufacturers. This feature
greatly simplifies the design of switch-mode power supplies
using these advanced ICs. Also included in the datasheet
are selector guides for diodes and capacitors designed to
work in switch-mode power supplies.
Other features include a guaranteed ±1.5% tolerance on
output voltage within specified input voltages and output
load conditions, and ±10% on the oscillator frequency. Ex-
ternal shutdown is included, featuring typically 50 A
stand-by current. The output switch includes current limiting,
as well as thermal shutdown for full protection under fault
conditions.
To simplify the LM2675 buck regulator design procedure,
there exists computer design software, LM267X Made
Simple version 6.0.
Features
n
Efficiency up to 96%
n
Available in SO-8, 8-pin DIP and LLP packages
n
Computer Design Software LM267X Made Simple
(version 6.0)
n
Simple and easy to design with
n
Requires only 5 external components
n
Uses readily available standard inductors
n
3.3V, 5.0V, 12V, and adjustable output versions
n
Adjustable version output voltage range: 1.21V to 37V
n ±
1.5% max output voltage tolerance over line and load
conditions
n
Guaranteed 1A output load current
n
0.25
DMOS Output Switch
n
Wide input voltage range: 8V to 40V
n
260 kHz fixed frequency internal oscillator
n
TTL shutdown capability, low power standby mode
n
Thermal shutdown and current limit protection
Typical Applications
n
Simple High Efficiency (>90%) Step-Down (Buck)
Regulator
n
Efficient Pre-Regulator for Linear Regulators
n
Positive-to-Negative Converter
Typical Application
01280301
SIMPLE SWITCHER is a registered trademark of National Semiconductor Corporation.
Windows is a registered trademark of Microsoft Corporation.
June 2005
LM2675
SIMPLE
SWITCHER
Power
Converter
High
Efficiency
1A
Step-Down
V
oltage
Regulator
2005 National Semiconductor Corporation
DS012803
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM2677LDX-5.0 | 8.75 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14 |
| LM2677LD-3.3 | 8.75 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14 |
| LM2677LDX-12 | 8.75 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14 |
| LM2677LD-12 | 8.75 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14 |
| LM2677SDX-3.3/NOPB | 8.75 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, DSO14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2675M-3.3 | 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 |
| LM2675M-3.3 | 制造商:Texas Instruments 功能描述:SWITCHING REG 0.1A 3.3V SMD 2675 |
| LM2675M-3.3/NOPB | 功能描述:直流/直流开关转换器 HIGH EFF 1A STEP- DOWN VLTG REG 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 |
| LM2675M-33 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LM2675 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage |
| LM2675M-5 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LM2675 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage |
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