LM25085是TI公司的一款控制器（外部开关）产品，LM25085是42V 宽输入电压恒定导通时间 PFET 降压开关控制器，本页介绍了LM25085的产品说明、应用、特性等，并给出了与LM25085相关的TI元器件型号供参考。
LM25085 - 42V 宽输入电压恒定导通时间 PFET 降压开关控制器 - 控制器（外部开关） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
- 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
- Automotive Infotainment
- Battery/Super Capacitor Chargers
- LED Drivers
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.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM25085-Q1 | HVSSOP (8) | 3.00 mm x 3.00 mm |
| LM25085 | VSSOP (8) | 3.00 mm x 3.00 mm |
| WSON (8) | 3.00 mm x 3.00 mm | |
| HVSSOP (8) | 3.00 mm x 3.00 mm |
