LM25085

更新时间： 2024-10-01 12:06:07

品牌	Logo	应用领域
德州仪器 - TI		开关控制器
页数	文件大小	规格书
30页	1508K
描述
LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller

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LM25085 数据手册

LM25085, LM25085-Q1

www.ti.com

SNVS593H –OCTOBER 2008–REVISED MARCH 2013

LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller

Check for Samples: LM25085, LM25085-Q1

FEATURES

PACKAGE

•

LM25085-Q1 is an Automotive Grade product

that is AEC-Q100 Grade 1 Qualified (-40°C to

125°C Operating Junction Temperature)

•

HVSSOP-8

VSSOP-8

WSON-8 (3mm x 3mm)

•

Wide 4.5V to 42V Input Voltage Range

Adjustable Current Limit Using R_DS(ON)or a

Current Sense Resistor

DESCRIPTION

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 R_DS(ON)of the PFET or an external

sense resistor can be used to sense current for over-

current detection.

•

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

Typical Application, Basic Step Down Controller

4.5V to 42V

VCC

LM25085

Input

VIN

VCC

ADJ

GND

ADJ

PGATE

SHUTDOWN

OUT

ISEN

OUT

GND

Cff

FB2

GND

FB1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...30

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与LM25085相关器件

型号	品牌	获取价格	描述	数据表
LM25085_15	TI	获取价格	LM25085 / -Q1 42V Constant On-Time PFET Buck Switching Controller
LM25085A	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085A	TI	获取价格	42V Constant On-Time PFET Buck Switching Controller
LM25085AMM	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMM/NOPB	TI	获取价格	4.5-42V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller with 0.9V Referenc
LM25085AMME	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMME/NOPB	TI	获取价格	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
LM25085AMMX	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
LM25085AMMX/NOPB	TI	获取价格	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
LM25085AMY	NSC	获取价格	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference

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