Converters | LM2575

降圧レギュレータ、スイッチング、調整可能出力電圧、1.0 A

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降圧スイッチング・レギュレータ LM2575 は、容易で使いやすいステップダウン・スイッチング・レギュレータ (降圧コンバータ) の設計に最適なモノリシック集積回路です。このシリーズのすべての回路では、優れた活線/負荷レギュレーションにより、1.0 A の負荷を駆動できます。3.3 V、5.0 V、12 V、15 V の固定出力電圧で提供されますが、出力が調整可能なバージョンもあります。外付け部品の数を最小限にする設計であるため、電源設計がシンプルになります。LM2575 で利用するために最適化されたインダクタの標準シリーズは、複数のインダクタ・メーカが提供しています。LM2575 コンバータはスイッチモード電源であるため、よくある 3 端子活線レギュレータと比較して大幅に効率が高くなっています。特に高いのは入力電圧です。多くの場合、LM2575 レギュレータによる電力損失が非常に低いため、ヒートシンクが必要なくなるか大幅に縮小できます。LM2575 で保証される許容度は、仕様の範囲内にある入力電圧/出力負荷状態での出力電圧が +/-4%、発振器周波数が +/-10% (0C ～ 125C で +/-2%) です。外部シャットダウン機能もあります。スタンバイ電流は 80 uA (公称) です。出力スイッチではサイクル単位で電流制限をするのに加え、故障状態でサーマル・シャットダウンにより完全に保護します。

  • Simple and High-Efficiency Step-Down (Buck) Regulators
  • Efficient Pre-Regulator for Linear Regulators
  • On-Card Switching Regulators
  • Positive to Negative Converters (Buck-Boost)
  • Negative Step-Up Converters
  • Power Supply for Battery Chargers
  • 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%
    Maximum Over Line and Load Conditions
  • Guaranteed 1.0 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
  • Pb-Free Packages are Available

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MSL Type

MSL Temp (°C)

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VCC Min (V)

VCC Max (V)

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IO Typ (A)

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Reference Price

LM2575D2T-12R4G

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Active

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

12

1

85

52

$1.2245

More Details

LM2575D2T-15R4G

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Lifetime

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

15

1

85

52

$0.8349

More Details

LM2575D2T-3.3R4G

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Active

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

3.3

1

85

52

$1.0709

More Details

LM2575D2T-5G

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Active

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

TUBE

50

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.1166

More Details

LM2575D2T-5R4G

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Active

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.21

More Details

LM2575D2T-ADJG

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Active

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

1

85

52

$1.0669

More Details

LM2575D2T-ADJR4G

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Active

CAD Model

Pb

A

H

P

D2PAK-5

936A-02

1

260

REEL

800

N

Step-Down

Voltage Mode

7

40

1.23 to 37

1

85

52

$1.1132

More Details

LM2575T-3.3G

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Active

CAD Model

Pb

A

H

P

TO-220-5

314D-04

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

3.3

1

85

52

$0.9494

More Details

LM2575T-5G

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Active

CAD Model

Pb

A

H

P

TO-220-5

314D-04

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

5

1

85

52

$1.1874

More Details

LM2575T-ADJG

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Active

CAD Model

Pb

A

H

P

TO-220-5

314D-04

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

1

85

52

$1.0794

More Details

LM2575TV-ADJG

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Active

CAD Model

Pb

A

H

P

TO-220-5

314B-05

NA

0

TUBE

50

N

Step-Down

Voltage Mode

7

40

1.23

1

85

52

$1.1733

More Details

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