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参数资料
| 型号： | LM2671-5.0MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.25 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 1/30页 |
| 文件大小： | 612K |
| 代理商： | LM2671-5.0MDC |
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LM2671
SIMPLE SWITCHER Power Converter High Efficiency
500mA Step-Down Voltage Regulator with Features
General Description
The LM2671 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 500mA load current
with excellent line and load regulation. These devices are
available 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), fixed frequency oscillator, external shutdown,
soft-start, and frequency synchronization.
The LM2671 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 LM2671 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 LM2671 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 500mA 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
Soft-start and frequency synchronization
n
Thermal shutdown and current limit protection
Applications
n
Simple High Efficiency (>90%) Step-Down (Buck)
Regulator
n
Efficient Pre-Regulator for Linear Regulators
Typical Application (Fixed Output Voltage Versions)
10004201
SIMPLE SWITCHER is a registered trademark of National Semiconductor Corporation.
Windows is a registered trademark of Microsoft Corporation.
May 2001
LM2671
SIMPLE
SWITCHER
Power
Converter
High
Efficiency
500mA
Step-Down
V
oltage
Regulator
with
Features
2001 National Semiconductor Corporation
DS100042
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM2671-ADJMWC | 1.25 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| LM2672-3.3MDC | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| LM2672-3.3MWC | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| LM2672-ADJMWC | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| LM2672-12MDC | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2671LD-12 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:SIMPLE SWITCHER㈢ Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features |
| LM2671LD-12/NOPB | 功能描述:IC REG BUCK 12V 0.5A 16LLP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:SIMPLE SWITCHER® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| LM2671LD-3.3 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features |
| LM2671LD-3.3/NOPB | 功能描述:IC REG BUCK 3.3V 0.5A 16LLP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:SIMPLE SWITCHER® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| LM2671LD-5.0 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features |
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