現在提供此產品的更新版本
功能相同，但引腳輸出與所比較的裝置不同
LM20143
- Available in AEC-Q100 Temperature Grade 1
- Input Voltage Range: 2.95 V to 5.50 V
- Accurate Current Limit Minimizes Inductor Size
- 97% Peak Efficiency
- Adjustable Output Voltage Down to 0.80 V
- Adjustable Switching Frequency (500 kHz to 1.5
MHz) - 32-mΩ Integrated FET Switches
- Starts into Prebiased Loads
- Output Voltage Tracking
- Peak Current Mode Control
- Adjustable Soft-Start with External Capacitor
- Precision Enable Pin with Hysteresis
- Integrated OVP, UVLO, Power Good and Thermal
Shutdown
The LM20143 devices are full featured PowerWise™ adjustable frequency synchronous buck regulators capable of delivering up to 3 A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low 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. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.
The frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground.
The LM20143 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 LM20143 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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM20143/LM20143-Q1 3-A PowerWise™ AdjustableFrequency Synchronous Buck Regulator datasheet (Rev. H) | PDF | HTML | 2016年 1月 5日 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| EVM User's guide | AN-1691 LM20143 Evaluation Board (Rev. B) | 2013年 5月 5日 | ||
| Application note | AN-1747 3A LM20k Reference Designs (Rev. A) | 2013年 5月 3日 | ||
| Application note | AN-2077 LM20k POL Module (Rev. A) | 2013年 5月 3日 |
設計與開發
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LM20143EVAL — 3A、PowerWise®: 可調整頻率同步降壓穩壓器評估模組
The LM20143 is a full featured buck switching regulator capable of driving up to 3A of load current. The switching frequency of the LM20143 can be varied from 500kHz to 1.5Mhz with an external resistor allowing the size of the power stage components to be reduced while still providing efficient (...)
| 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
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點