LM25085 - 42V 宽输入电压恒定导通时间 PFET 降压开关控制器

LM25085是TI德州仪器公司的一款控制器（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，本站介绍了LM25085的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品特性

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

产品应用

Automotive Infotainment
Battery/Super Capacitor Chargers
LED Drivers

产品说明

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.

产品器件信息

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

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