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LM5143-Q1
- AEC-Q100 qualified for
automotive applications:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature
- Functional Safety-Capable
- Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 65 V
- 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
- 150°C maximum junction temperature
- Shutdown mode current: 4 µA typical
- No-load standby current: 15 µA typical
- Two interleaved synchronous buck channels
- Dual-channel or single-output multiphase
- 65-ns tON(min) for high VIN/VOUT ratio
- 60-ns tOFF(min) for low dropout
- Inherent protection features for robust design
- Hiccup-mode overcurrent protection
- Independent ENABLE and PGOOD functions
- VCC, VDDA, and gate-drive UVLO protection
- Thermal shutdown protection with hysteresis
- Optimized for ultra-low EMI requirements
- Slew-rate controlled adaptive gate drivers
- Spread spectrum reduces peak emissions
- Optimized for CISPR 25 Class 5 requirements
- Switching frequency from 100 kHz to 2.2 MHz
- SYNC in and SYNC out capability
- Selectable diode emulation or FPWM
- VQFNP-40 pacakge with wettable flank pins
- Create a custom design using the LM5143-Q1 with WEBENCH Power Designer
The LM5143-Q1 is a 65-V synchronous buck DC/DC controller for high-current single or dual outputs. The device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on-time of 65 ns gives large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-Vautomotive inputs to low-voltage rails for reduced system complexity and solution cost. The LM5143-Q1 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
Current is sensed using the inductor DCR for highest efficiency or an optional shunt resistor for high accuracy. The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143-Q1 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.
技術文件
設計與開發
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LM5143-Q1EVM-2100 — 雙通道汽車同步降壓控制器評估模組
LM5143DESIGN-CALC — LM5143-Q1 Controller Quickstart Design Tool
此獨立式工具可推動並協助設計以 LM5143-Q1 同步降壓 DC/DC 控制器及低 IQ 為基礎的 DC/DC 降壓穩壓器。使用者可以迅速達到最佳化的設計,以符合應用需求。
PMP23262 — 200-W 車用雙相同步降壓轉換器參考設計
PMP23380 — 車用 24VIN 至 60VIN、60A 雙相轉換器參考設計
此參考設計可為汽車先進駕駛輔助系統 (ADAS)、車載資訊娛樂系統及儀錶板應用提供動力。工作範圍涵蓋整個汽車範圍,包括電池電壓突波至 60V。該設計在 24VIN 至 48VIN 範圍內表現出 93% 至 96% 的峰值轉換效率。結果顯示,對於 30A 步進與突降,輸出電壓下沖和過衝為 2%。測試報告包括完整輸入範圍內的操作資料,並提供波德圖,透過充足裕量、內部波形和熱影像來驗證穩定性。
PMP23404 — 24VIN 至 60VIN、300W 車用雙相轉換器參考設計
PMP30670 — 適用於數位駕駛艙處理單元的汽車大範圍 VIN 前端參考設計
此參考設計可說明汽車數位駕駛艙應用的電路圖。LM74700-Q1 可為系統及輸入濾波器提供低損耗反向極性保護。LM5143-Q1 雙同步降壓轉換器提供 3.3-V 軌,最多可支援 15 A 處理器模組,以及來自 KL30 具 3 A 的 5-V 軌。TPS62810-Q1 同步降壓轉換器可從 5-V 輸出提供 1.1-V 及 3-A 軌。另一條來自 KL30 具 3A 的獨立 3.3-V 軌是由 LM63635-Q1 同步降壓轉換器提供。
PMP31210 — 具有擴展輸入電壓範圍的 700-W、四相降壓轉換器參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFNP (RWG) | 40 | 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。