
- 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:具有精密启用和无需外部补偿组件的低压同步降压控制器
- 点击这里打开及下载LM1771的技术文档资料
- TI代理渠道,提供当日发货、严格的质量标准,满足您的目标价格

The LM1771 device is an efficient synchronous buck switching controller with a precision enable requiring no external compensation. The constant ON-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. The precision enable pin allows flexibility in sequencing multiple rails and setting UVLO. The LM1771 also incorporates a unique input feedforward to maintain a constant frequency independent of the input voltage. The LM1771 is optimized for a low-voltage input range of 2.8 V to 5.5 V and can provide an adjustable output as low as 0.8 V. Driving an external high-side PFET and low-side NFET, it can provide efficiencies as high as 95%.
Three versions of the LM1771 are available depending on the switching frequency desired for the application. Nominal switching frequencies are in the range of 100 kHz to 1000 kHz.
- Input Voltage Range of 2.8 V to 5.5 V
- 0.8-V Reference Voltage
- Precision Enable
- No Compensation Required
- Constant Frequency Across Input Range
- Low Quiescent Current of 400 μA
- Internal Soft-Start
- Short Circuit Protection
- 6-Pin WSON Package and 8-Pin VSSOP Package
- Vin (Min) (V)
- 2.8
- Vin (Max) (V)
- 5.5
- Vout (Min) (V)
- 0.8
- Vout (Max) (V)
- 4.5
- Iout (Max) (A)
- 6
- Iq (Typ) (uA)
- 400
- Switching frequency (Min) (kHz)
- 500
- Switching frequency (Max) (kHz)
- 2000
- Features
- Enable
- Regulated outputs (#)
- 1
- Number of phases
- 1
- Rating
- Catalog
LM1771的完整型号有:LM1771SMM/NOPB、LM1771SSD/NOPB、LM1771TMM/NOPB、LM1771UMM/NOPB、LM1771USD/NOPB,以下是这些产品的关键参数及官网采购报价:
LM1771SMM/NOPB,工作温度:PropertyValue,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LM1771SMM/NOPB的批量USD价格:.726(1000+)
LM1771SSD/NOPB,工作温度:-40 to 125,封装:WSON (NGG)-6,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LM1771SSD/NOPB的批量USD价格:.726(1000+)
LM1771TMM/NOPB,工作温度:PropertyValue,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LM1771TMM/NOPB的批量USD价格:.726(1000+)
LM1771UMM/NOPB,工作温度:PropertyValue,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LM1771UMM/NOPB的批量USD价格:.726(1000+)
LM1771USD/NOPB,工作温度:-40 to 125,封装:WSON (NGG)-6,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LM1771USD/NOPB的批量USD价格:.726(1000+)

LM1771EVAL — 具有精密启用和无需外部补偿组件的低压同步降压控制器
LM1771 Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
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