LM53603
- 3-A or 2-A Maximum Load Current
- Input Voltage Range From 3.5 V to 36 V: Transients to 42 V
- Adjustable Output Voltage From 3.3 V to 10 V
- 2.1-MHz Fixed Switching Frequency
- ±2% Output Voltage Tolerance
- –40°C to 150°C Junction Temperature Range
- 1.7-µA Shutdown Current (Typical)
- 24-µA Input Supply Current at No Load (Typical)
- Reset Output With Filter and Delay
- Automatic Light Load Mode for Improved Efficiency
- User-Selectable Forced PWM Mode (FPWM)
- Built-In Loop Compensation, Soft-Start, Current Limit, Thermal Shutdown, UVLO, and External Frequency Synchronization
- Thermally Enhanced 16-Lead Package: 5 mm × 4.4 mm × 1 mm
The LM53603 and LM53602 buck regulators are specifically designed for 12-V industrial and automotive applications, providing an adjustable output voltage from 3.3 V to 10 V at 3 A or 2 A, from an input voltage of up to 36 V. Advanced high-speed circuitry allows the device to regulate from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3-V output from an input voltage of only 3.5 V. All aspects of this product are optimized for the industrial and automotive customer. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. An open-drain reset output, with filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transition between PWM and PFM modes, along with a no-load operating current of only 24 µA, ensures high efficiency and superior transient response at all loads.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM53603 (3 A), LM53602 (2 A) 3.5 V to 36 V Wide-VIN Synchronous 2.1 MHz Step-Down Converters datasheet | PDF | HTML | 2016/11/22 | ||
| 選擇指南 | Buck Converter Quick Reference Guide (Rev. B) | 2021/4/8 | ||||
| 技術文章 | Effects of IC package on EMI performance | PDF | HTML | 2018/5/22 | |||
| 應用說明 | Create a Split-Rail Power Supply with a Wide Input Voltage Buck Regulator (Rev. A) | 2012/10/26 |
設計與開發
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LM53603AEVM — LM53603-Q1 可調整輸出 3A 降壓穩壓器評估模組 (EVM)
PMP10651 — 適用於 12V 電池且具備所有保護功能的 2.2MHz 切換及同步分離式電源參考設計
PMP10651 是低雜訊、多輸出 SMPS 設計，其中，LM53603 在反相降壓升壓 Fly-Buck 拓撲中得到應用，可在多種對雜訊敏感的應用中產生所需的正負電源，例如為高速視訊放大器、RF 放大器、精密低雜訊放大器等供電。此設計接受 7Vin 至 15Vin DC（在 12V 鉛酸電池下）的輸入電壓，並提供 +12V@500mA、-12v@500mA、5V @400mA 和 3.3V@150mA 的輸出。本解決方案體積小巧，是使用返馳或推挽轉換器的平價且更有效率的解決方案。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。