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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  • LMR14030  -  4 to 40V, 3.5A 2.2MHz Step-Down Voltage Regulator - Low Quiescent Current, Smaller Solution Size
  • LMR23630  - 器件与被比较器件具有相似功能,但并不功能等效。 

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
  • 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
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
TO-220   
DDPAK/TO-263
PDIP
SOIC
TO-220   
HTSSOP
SON   
SO PowerPAD    SO PowerPAD
SON   

特色工具和软件

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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


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