LM1771是TI公司的一款控制器（外部开关）产品，LM1771是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，本页介绍了LM1771的产品说明、应用、特性等，并给出了与LM1771相关的TI元器件型号供参考。
LM1771 - 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 - 控制器（外部开关） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
The LM1771 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 feed-forward to maintain a constant frequency independent of the input voltage. The LM1771 is optimized for a low voltage input range of 2.8V to 5.5V and can provide an adjustable output as low as 0.8V. 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 100kHz to 1000kHz.
- Input Voltage Range of 2.8V to 5.5V
- 0.8V 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
