LM5166
- Wide Input Voltage Range of 3 V to 65 V
- 9.7-µA No-Load Quiescent Current
- –40°C to 150°C Junction Temperature Range
- Fixed (3.3-V, 5-V) or Adjustable VOUT Options
- Meets EN55022 / CISPR 22 EMI Standards
- Integrated 1-Ω PFET Buck
Switch
- Supports 100% Duty Cycle for Low Dropout
- Integrated 0.5-Ω NFET Synchronous
Rectifier
- Eliminates External Schottky Diode
- Programmable Peak Current Limit
Supports:
- 500-mA, 300-mA, or 200-mA Loads
- Selectable PFM or COT Mode Operation
- 1.223-V ±1.2% Internal Voltage Reference
- Switching Frequency up to 600 kHz
- 900-µs Internal or Externally-Adjustable Soft Start
- Diode Emulation and Pulse Skipping for Ultra-High Light-Load Efficiency
- No Loop Compensation or Bootstrap Components
- Precision Enable and Input UVLO With Hysteresis
- Open-Drain Power Good Indicator
- Thermal Shutdown Protection With Hysteresis
- Pin-to-Pin Compatible With the LM5165
- 10-Pin, 3-mm × 3-mm VSON Package
- Create a Custom Regulator Design Using WEBENCH® Power Designer
The LM5166 is a compact, easy-to-use, 3-V to 65-V, ultra-low IQ synchronous buck converter with high efficiency over wide input voltage and load current ranges. With integrated high-side and low-side power MOSFETs, up to 500 mA of output current can be delivered at fixed output voltages of 3.3 V or 5 V, or an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance for the target application. Pulse frequency modulation (PFM) mode is selected for optimal light-load efficiency or constant on-time (COT) control for nearly constant operating frequency. Both control schemes do not require loop compensation while providing excellent line and load transient response and short PWM on-time for large step-down conversion ratios.
The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltage and does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint is adjustable to optimize inductor selection for a particular load current requirement. Selectable and adjustable start-up timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can be used for sequencing, fault reporting, and output voltage monitoring. The LM5166 is available in a 10-pin VSON package with 0.5-mm pin pitch.
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設計與開發
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LM5166EVM-C33A — LM5166 寬輸入電壓、低 IQ、COT 3.3V 500mA 評估模組
LM5166EVM-C50A — LM5166 寬輸入電壓、低 IQ、COT 5V 500mA 評估模組
LM5166DESIGN-CALC — LM5166 DC/DC 轉換器設計工具
歡迎使用 LM5166 快速入門設計工具。此獨立工具協助電源供應工程師基於 LM5166 低 IQ 同步降壓 DC/DC 穩壓器設計 DC/DC 降壓轉換器。因此,使用者可以迅速達到最佳化的設計,以符合應用需求。
TIDA-010049 — 適用於 IEC 61508 的 TUV 評估數位輸入參考設計 (SIL-2)
TIDA-010055 — 非隔離電源架構,具有用於保護繼電器模組的診斷參考設計
TIDA-01358 — 適用於智慧空調、具有寬輸入電壓轉換器和備用電池的 24V AC 功率級參考設計
TIDA-01386 — 具有 IO-Link 的超音波距離感測器參考設計
TIDA-01395 — 適用於智慧空調、具有寬輸入電壓轉換器和電池電量計的 24V AC 功率級參考設計
TIDA-01437 — 具有 IO-Link 介面的 RGB 訊號燈參考設計
此參考設計實作五段 LED 智慧堆疊燈,其中配備 20 個 LED,用於工廠和複雜度較高的工業製程自動化。系統採用 IO 連結介面,用於控制堆疊燈並回讀狀態資訊。此設計採用可透過 IO 連結介面供電的低功耗特色。
此訊號燈參考設計展示了如何將 RGB LED 驅動器的功率消耗降低 30%,以及擴大亮度控制範圍。自動亮度控制可根據環境光線調整亮度。此參考設計使用簡單的 PWM 來修改切換穩壓器的輸出電壓,以實作動態空餘空間控制。
TIDA-01487 — 隔離式 CAN 靈活資料 (FD) 速率中繼器參考設計
TIPD215 — 具有自適型電源管理、功耗低於 1W 的四通道類比輸出模組參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (DRC) | 10 | 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。