ホーム パワー マネージメント リニア レギュレータと低ドロップアウト (LDO) レギュレータ

1A、負電圧、低ドロップアウト電圧レギュレータ

製品詳細

Rating Catalog Vin (max) (V) -6 Vin (min) (V) -26 Iout (max) (A) 1 Output options Fixed Output, Negative Output Vout (max) (V) -5 Vout (min) (V) -15 Fixed output options (V) -15, -12, -5.2, -5 Noise (µVrms) 250 PSRR at 100 KHz (dB) 23 Iq (typ) (mA) 1 Thermal resistance θJA (°C/W) 23, 41.2 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 4.9 Dropout voltage (Vdo) (typ) (mV) 600 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) -6 Vin (min) (V) -26 Iout (max) (A) 1 Output options Fixed Output, Negative Output Vout (max) (V) -5 Vout (min) (V) -15 Fixed output options (V) -15, -12, -5.2, -5 Noise (µVrms) 250 PSRR at 100 KHz (dB) 23 Iq (typ) (mA) 1 Thermal resistance θJA (°C/W) 23, 41.2 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Accuracy (%) 4.9 Dropout voltage (Vdo) (typ) (mV) 600 Operating temperature range (°C) -40 to 125
TO-220 (NDE) 3 46.5328 mm² (10.16 mm × 4.58 mm) TO-263 (KTT) 3 154.8384 mm² (10.16 mm × 15.24 mm)
  • Input Voltage: –26 V to –6 V
  • Fixed Output Voltages: −5 V, −5.2 V, −12 V, and
    −15 V
  • 5% Output Accuracy over Entire Operating Range
  • Output Current in Excess of 1 A
  • Dropout Voltage Typically 0.6 V at 1-A Load
  • Low Quiescent Current
  • Internal Short-Circuit Current Limit
  • Internal Thermal Shutdown with Hysteresis
  • Functional Complement to the LM2940 Series
  • Input Voltage: –26 V to –6 V
  • Fixed Output Voltages: −5 V, −5.2 V, −12 V, and
    −15 V
  • 5% Output Accuracy over Entire Operating Range
  • Output Current in Excess of 1 A
  • Dropout Voltage Typically 0.6 V at 1-A Load
  • Low Quiescent Current
  • Internal Short-Circuit Current Limit
  • Internal Thermal Shutdown with Hysteresis
  • Functional Complement to the LM2940 Series

The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V.

The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3 V). Output voltage accuracy is ensured to ±5% over load and temperature extremes.

The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time.

All these features make the LM2990 an ideal negative power supply suited for dual supply systems. The device may also be used as fixed or adjustable current sink load.

The LM2990 is available in two 3-pin packages and is rated for operation over the junction temperature range of −40°C to 125°C.

The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V.

The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3 V). Output voltage accuracy is ensured to ±5% over load and temperature extremes.

The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time.

All these features make the LM2990 an ideal negative power supply suited for dual supply systems. The device may also be used as fixed or adjustable current sink load.

The LM2990 is available in two 3-pin packages and is rated for operation over the junction temperature range of −40°C to 125°C.

ダウンロード 字幕付きのビデオを表示 ビデオ

技術資料

結果が見つかりませんでした。検索条件をクリアしてから、再度検索を試してください。
3 をすべて表示
上位の文書 タイプ タイトル フォーマットオプション 最新の英語版をダウンロード 日付
* データシート LM2990 Negative Low-Dropout Regulator データシート (Rev. G) PDF | HTML 2015/05/15
アプリケーション・ノート A Topical Index of TI LDO Application Notes (Rev. F) 2019/06/27
アプリケーション・ノート Linear and Switching Voltage Regulator Fundamental Part 1 2007/03/21

設計と開発

その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。

パッケージ ピン数 CAD シンボル、フットプリント、および 3D モデル
TO-220 (NDE) 3 Ultra Librarian
TO-263 (KTT) 3 Ultra Librarian

購入と品質

推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。

サポートとトレーニング

TI E2E™ フォーラムでは、TI のエンジニアからの技術サポートを提供

コンテンツは、TI 投稿者やコミュニティ投稿者によって「現状のまま」提供されるもので、TI による仕様の追加を意図するものではありません。使用条件をご確認ください。

TI 製品の品質、パッケージ、ご注文に関するお問い合わせは、TI サポートをご覧ください。​​​​​​​​​​​​​​

ビデオ