Datasheet > LM25085_15

LM25085_15

更新时间： 2024-11-16 00:56:15

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德州仪器 - TI		/
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LM25085 / -Q1 42V Constant On-Time PFET Buck Switching Controller

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LM25085, LM25085-Q1

SNVS593J –OCTOBER 2008–REVISED NOVEMBER 2014

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

1 Features

3 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.

•

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 R_DS(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

Device Information⁽¹⁾

Integrated High Voltage Bias Regulator

Thermal Shutdown

PART NUMBER

PACKAGE

BODY SIZE (NOM)

3.00 mm x 3.00 mm

LM25085-Q1

HVSSOP (8)

VSSOP (8)

WSON (8)

HVSSOP (8)

2 Applications

LM25085

•

Automotive Infotainment

Battery/Super Capacitor Chargers

LED Drivers

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

4.5V to 42V

Input

VCC

LM25085

VIN

VCC

ADJ

GND

ADJ

PGATE

ISEN

SHUTDOWN

OUT

Cff

FB2

GND

FB1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...34

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与LM25085_15相关器件

型号	品牌	获取价格	描述	数据表
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
LM25085AMY/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

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