LM2576 SIMPLE SWITCHER® 3A 降压电压稳压器 | 德州仪器 TI.com.cn

LM2576 (正在供货)

SIMPLE SWITCHER® 3A 降压电压稳压器

SIMPLE SWITCHER® 3A 降压电压稳压器 - LM2576
数据表
 

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描述

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include fault protection and a fixed-frequency oscillator.

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

特性

  • 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range,1.23 V to 37 V (57 V for HV Version) ±4% Maximum Over Line and Load Conditions
  • Specified 3-A Output Current
  • Wide Input Voltage Range: 40 V Up to 60 V for HV Version
  • Requires Only 4 External Components
  • 52-kHz Fixed-Frequency Internal Oscillator
  • TTL-Shutdown Capability, Low-Power Standby Mode
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Create a Custom Design with WEBENCH Tools
  • Thermal Shutdown and Current Limit Protection

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参数 与其它产品相比 降压转换器(集成开关)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Type
LM2576 LM2575-N LM43603 LMR14030 LMR23630
4     4     3.5     4     4.5    
40     40     36     40     36    
3.3     3.3     1     1     1    
37     37     28     36     30    
3     1     3     3.5     3    
1     1     1     1     1    
42     42     200     200     200    
63     63     2200     2500     2200    
5     10     0.027     0.04     0.075    
Enable     Enable     Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Voltage Mode     Voltage Mode     Current Mode     Current Mode     Current Mode    
98     98     99     98     97    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog    
DDPAK/TO-263 | 5
TO-220 | 5    
DDPAK/TO-263 | 5
PDIP | 16
SOIC | 24
TO-220 | 5    
HTSSOP | 16
SON | 16    
SO PowerPAD | 8     SO PowerPAD | 8
SON | 12    
Converter     Converter     Converter     Converter     Converter    

特色工具和软件

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM2576

  最小   最大 范围
输入电压  V 4.5 to 40.0V
输出电压  V 1.23 to 37V
输出电流  A ≤ 3A
环境温度  °C -40 to 125°C


覆盖面积 BOM成本 效率


Preview design