LM20242
- 2A Output Current, 3.7A Peak Current
- 130 mΩ/110 mΩ Integrated Power MOSFETs
- 1.5% Output Voltage Accuracy
- Current Mode Control, Selectable Compensation
- Resistor Programmed, 1MHz Capable Oscillator
- Synchronous Rectifier with Diode Emulation
- Adjustable Output Voltage Down to 0.8V
- Compatible with Pre-Biased Loads
- Programmable Soft-Start With External Capacitor
- Precision Enable Pin with Hysteresis
- OVP, UVLO Inputs and PGOOD Output
- Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
- Accurate Current Limit with Frequency Foldback
- Non-Linear Current Mode Slope Compensation
- HTSSOP Exposed Pad Package
PowerWise is a trademark of Texas Instruments. All trademarks are the property of their respective owners.
The LM20242 is a full featured 1MHz capable synchronous buck regulator capable of delivering up to 2A of load current. The current mode control loop is externally compensated with only two external components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.
The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated PGOOD circuit.
The LM20242 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20242 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.
The LM20242 is offered in an exposed pad 20 pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.
技術資料
| 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 | LM20242 36V, 2A PowerWise ® Adjustable Frequency Synchronous Buck Regulator データシート (Rev. E) | 2013/03/28 | |||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| その他の技術資料 | LM20242 入力4.5V~36V 出力2A 同期整流降圧DCDCコンバータ | 2013/12/11 | ||||
| アプリケーション・ノート | AN-2077 LM20k POL Module (Rev. A) | 2013/05/03 | ||||
| 製品概要 | 36V耐圧版、LM20Kファミリー | 2012/08/20 | ||||
| ユーザー・ガイド | LM20242 Demonstration Board User Guide | 2012/01/27 | ||||
| ユーザー・ガイド | Application Note 1694 LM20242 Evaluation Board (jp) | 2007/10/30 |
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。
LM20242EVAL — 36V、2A PowerWise 可変周波数、同期整流・降圧レギュレータ
The LM20242 synchronous rectifier Buck evaluation board is designed to provide the design engineer with a fully functional Buck power converter based on Current Mode Control to evaluate the LM20242 switching regulator IC. The evaluation board provides a 3.3V output with 2A current capability. The (...)
LM20242DESIGN-CALC — LM20242 カリキュレータ スプレッドシート
PMP4494 — 200mS 出力電圧ホールドアップ タイム回路搭載、5V ～ 3.3V、1.2A DC/DC コンバータのリファレンス デザイン
| 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 |
|---|---|---|
| HTSSOP (PWP) | 20 | 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。