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- 制造厂商:TI
- 产品类别:电源管理
- 技术类目:直流/直流开关稳压器 - 降压稳压器
- 功能描述:4.5V 至 42V 宽输入电压、恒定导通时间非同步、0.9V 基准电压 PFET 降压控制器
- 点击这里打开及下载LM25085A的技术文档资料
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The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller. The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).
The LM25085A 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.
- 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 0.9V
- Precision ±2% Feedback Reference
- Capable of 100% Duty Cycle Operation
- Internal Soft-Start Timer
- Integrated High Voltage Bias Regulator
- Thermal Shutdown
All trademarks are the property of their respective owners.
- Vin (Min) (V)
- 4.5
- Vin (Max) (V)
- 42
- Vout (Min) (V)
- 0.9
- Vout (Max) (V)
- 42
- Iout (Max) (A)
- 10
- Iq (Typ) (uA)
- 1250
- Switching frequency (Min) (kHz)
- 50
- Switching frequency (Max) (kHz)
- 1000
- Features
- Adjustable Current Limit, Frequency Synchronization
- Regulated outputs (#)
- 1
- Number of phases
- 1
- Rating
- Catalog
LM25085A的完整型号有:LM25085AMM/NOPB、LM25085AMME/NOPB、LM25085AMMX/NOPB、LM25085AMY/NOPB、LM25085AMYE/NOPB、LM25085AMYX/NOPB、LM25085ASD/NOPB、LM25085ASDE/NOPB、LM25085ASDX/NOPB,以下是这些产品的关键参数及官网采购报价:
LM25085AMM/NOPB,工作温度:-40 to 125,封装:VSSOP (DGK)-8,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085AMM/NOPB的批量USD价格:.871(1000+)
LM25085AMME/NOPB,工作温度:-40 to 125,封装:VSSOP (DGK)-8,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085AMME/NOPB的批量USD价格:.871(1000+)
LM25085AMMX/NOPB,工作温度:-40 to 125,封装:VSSOP (DGK)-8,包装数量MPQ:3500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085AMMX/NOPB的批量USD价格:.726(1000+)
LM25085AMY/NOPB,工作温度:-40 to 125,封装:HVSSOP (DGN)-8,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085AMY/NOPB的批量USD价格:.871(1000+)
LM25085AMYE/NOPB,工作温度:-40 to 125,封装:HVSSOP (DGN)-8,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085AMYE/NOPB的批量USD价格:.871(1000+)
LM25085AMYX/NOPB,工作温度:-40 to 125,封装:HVSSOP (DGN)-8,包装数量MPQ:3500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085AMYX/NOPB的批量USD价格:.726(1000+)
LM25085ASD/NOPB,工作温度:-40 to 125,封装:WSON (NGQ)-8,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085ASD/NOPB的批量USD价格:.871(1000+)
LM25085ASDE/NOPB,工作温度:-40 to 125,封装:WSON (NGQ)-8,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085ASDE/NOPB的批量USD价格:.871(1000+)
LM25085ASDX/NOPB,工作温度:-40 to 125,封装:WSON (NGQ)-8,包装数量MPQ:4500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25085ASDX/NOPB的批量USD价格:.726(1000+)
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LM25085AMYEEVAL — 具有 0.9V 参考的 LM25085AMYEEVAL 42V 恒准时 PFET 降压开关控制器
The LM25085AMYE evaluation board provides the design engineer with a fully functional buck regulator, employing the LM25085A PFET switching controller which uses the constant on-time (COT) operating principle. This evaluation board provides a 1V output over an input range of 4.5V to 24V. The (...)
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