降压稳压器,开关,可调输出电压,0.5 A

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LM2574 降压开关稳压器是单片集成电路,适用于步降开关稳压器(降压转换器)的简便设计。此系列的所有电路都可以驱动 0.5 A 负载,且具有卓越的线路和负载调节。此类器件提供 3.3 V、5.0 V、12 V、15 V 固定输出电压和可调输出版本。该降压开关稳压器适用于最大程度减少外部部件数量,可简化电源设计。适用于 LM2574 的标准电感器系列由若干不同电感器制造商提供。因为 LM2574 转换器是一款开关模式电源,其能效比受欢迎的三端子线性稳压器要高很多,尤其对于更高输入电压更是如此。在很多情况下,LM2574 稳压器的功耗非常低,以至于无需进行散热,或者其尺寸可以大幅减小。LM2574 功能包括指定输入电压和输出负载条件下保证输出电压的 4% 允差范围,振荡器频率为 +/-10%(0C 至 125C 范围为 +/-2%)。包含了外部关断,典型待机电流为 80 uA。输出开关包括按循环的电流限制以及高温关断,实现故障条件下的完整保护。

  • Efficient Pre-Regulator for Linear Regulators
  • On-Card Switching Regulators
  • Power Supply for Battery Chargers
  • Simple and High-Efficiency Step-Down (Buck) Regulators

  • Automotive NCV Version Available
  • 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range of 1.23 V to 37 V +/-4%
  • Guaranteed 0.5 A Output Current
  • Wide Input Voltage Range: 4.75 V to 40 V
  • 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
  • Moisture Sensitivity Level (MSL) Equals 1

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LM2574DW-ADJR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16W

3

260

REEL

1000

N

Step-Down

Voltage Mode

7

40

1.23

0.5

85

52

$1.0485

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LM2574N-12G

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Active

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

12

0.5

85

52

$1.0493

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LM2574N-5G

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Active

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

5

0.5

85

52

$0.8433

More Details

LM2574N-ADJG

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Active

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

0.5

85

52

$0.8433

More Details

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