LM5118
- Ultra-Wide Input Voltage Range From 3 V to 75 V
- Emulated Peak Current Mode Control
- Smooth Transition Between Step-Down and Step-Up Modes
- Switching Frequency Programmable to 500 KHz
- Oscillator Synchronization Capability
- Internal High Voltage Bias Regulator
- Integrated High and Low-Side Gate Drivers
- Programmable Soft-Start Time
- Ultra-Low Shutdown Current
- Enable Input Wide Bandwidth Error Amplifier
- 1.5% Feedback Reference Accuracy
- Thermal Shutdown
- Package: 20-Pin HTSSOP (Exposed Pad)
- Create a Custom Design Using the LM5118 With the WEBENCH® Power Designer
The LM5118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high-performance, cost-efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage, making it especially suitable for automotive applications. The LM5118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual-mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high-side buck MOSFET and the low-side boost MOSFET. The regulators control method is based upon current mode control using an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power-enhanced, 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.
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 | LM5118 Wide Voltage Range Buck-Boost Controller datasheet (Rev. J) | PDF | HTML | 2017/6/30 | ||
| 白皮書 | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 2019/4/10 | ||||
| 技術文章 | Learn how to keep your car battery steady and running longer | PDF | HTML | 2017/3/28 | |||
| 類比設計期刊 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016/7/21 | ||||
| 應用說明 | Maintaining Output Voltage Regulation During Automotive Cold-Crank with LM5118 | 2015/7/27 | ||||
| 白皮書 | Wide VIN power management ICs simplify white paper (Rev. A) | 2013/9/19 | ||||
| 使用指南 | AN-2178 LM5118 Four Switch Conversion (Rev. E) | 2013/5/6 |
設計與開發
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LM5118EVAL — 適用於 LM5118 寬輸入電壓降壓-升壓控制器的評估板
The LM5118 evaluation board is designed to provide the design engineer with a fully functional, Emulated Current Mode Control, buck-boost power converter to evaluate the LM5118 controller IC. The evaluation board provides a 12V output with 3A of output current capability. The evaluation board's (...)
PMLKBUCKBOOSTEVM — 使用 LM5118 的 TI-PMLK 降壓/升壓實驗電路板
BuckBoost 實驗電路板是德州儀器電源管理實驗室套件 (TI-PMLK) 系列的一塊電路板。 BuckBoost 實驗電路板使用 LM5118 IC。 BuckBoost 實驗電路板隨附一本書，逐步說明有關人員進行數項實驗，以強化其對電源供應器設計的理解。 TI-PMLK 旨在透過實驗教育使用者和開發人員有關電子理論和 TI 電源供應設計的知識。
PMLKBUCKBOOSTEVMB — 使用 LM5118 的 TI-PMLK 降壓/升壓實驗電路板，含 TI-PMLK 降壓/升壓實驗手冊
BuckBoost 實驗電路板是德州儀器電源管理實驗室套件 (TI-PMLK) 系列的一塊電路板。 BuckBoost 實驗電路板使用 LM5118 IC。 運送的包裝盒中會包含 TI-PMLKBUCKBOOSTEVM 硬體及 BuckBoost 實驗手冊的裝訂版，其中會逐步引導學員完成數項實驗，強化他們對電源供應設計的理解。 TI-PMLK 旨在透過實驗教育使用者和開發人員有關電子理論和 TI 電源供應設計的知識。
LM5118QUICK-CALC — LM5118/LM25118 Quick Start Component Calculator
LM5118QUICK-CALC — LM5118 快速入門元件計算機
PMP10681 — 針對汽車冷啟動最佳化之 3-42 Vin、3 A 下為 5 V 的降壓升壓參考設計
這是一款經過改良的 LM5118 2 開關降壓升壓單電感器評估模組 (EVM)，經過最佳化，可在冷車啟動等汽車瞬態時運作。該模組旨在提供 15W (5V, 3A) 的輸出功率，輸入電壓範圍為 3V 至 42V。
PMP15035 — 1000-W、雙向 12-V 至 12-V 轉換器參考設計
PMP30833 — 具有 24-V 或 48-V 輸出的 30-W 雙開關降壓升壓參考設計
TIDA-01040 — 適合高電流應用的電池測試器參考設計
TIDA-01041 — 適合多相高精密度 0.5 至 100A 電池化成作業的電池測試器參考設計
TIDA-01042 — 適合 50-A、100-A 及 200-A 應用的模組化電池測試器參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | 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。