LM25085
- LM25085-Q1 is an Automotive Grade product that is
AEC-Q100 Grade 1 Qualified (–40°C to 125°C
Operating Junction Temperature) - Wide 4.5V to 42V Input Voltage Range
- Adjustable Current Limit Using RDS(ON) or a
Current Sense Resistor - Programmable Switching Frequency to 1MHz
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Nearly Constant Operating Frequency with Line and
Load Variations - Adjustable Output Voltage from 1.25V
- Precision ±2% Feedback Reference
- Capable of 100% Duty Cycle Operation
- Internal Soft-Start Timer
- Integrated High Voltage Bias Regulator
- Thermal Shutdown
The LM25085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5V to 42V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultra-fast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM25085 / -Q1 42V Constant On-Time PFET Buck Switching Controller datasheet (Rev. J) | PDF | HTML | 2014年 11月 3日 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Application note | Transient Response versus Ripple – An Analysis of Ripple Injection Techniques | 2014年 4月 28日 | ||
| Application note | Automated Frequency Response Analyzer | 2013年 10月 9日 | ||
| EVM User's guide | AN-1905 LM25085 Evaluation Board (Rev. B) | 2013年 4月 26日 | ||
| Application note | Constant Current Constant Voltage Buck Converter w/LM25085 (Rev. A) | 2013年 4月 23日 |
設計與開發
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LM25085MYEVAL — 適用於 LM25085 - 42V 廣泛 Vin 固定導通時間 PFET 降壓切換控制器的評估板
The LM25085 evaluation board provides the design engineer with a fully functional buck regulator, employing the LM25085 PFET switching controller which uses the constant on-time (COT) operating principle. The evaluation board provides a 5V output over an input range of 5.5V to 42V. The circuit (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HVSSOP (DGN) | 8 | Ultra Librarian |
| VSSOP (DGK) | 8 | Ultra Librarian |
| WSON (NGQ) | 8 | 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