Datasheet > LM25019

LM25019

更新时间： 2024-11-14 12:00:31

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
18页	331K
描述
48V, 100mA Constant On-Time Synchronous Buck Regulator

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LM25019 数据手册

LM25019

www.ti.com

SNVS952 –DECEMBER 2012

LM25019 48V, 100mA Constant On-Time Synchronous Buck Regulator

Check for Samples: LM25019

FEATURES

•

Frequency Adjustable to 1MHz

Adjustable Undervoltage Lockout

Remote Shutdown

•

Wide 9V to 48V Input Range

Integrated 48V, High and Low Side Switches

No Schottky Required

Thermal Shutdown

Constant On-Time Control

APPLICATIONS

No Loop Compensation Required

Ultra-Fast Transient Response

Nearly Constant Operating Frequency

Intelligent Peak Current Limit

•

Industrial Equipments

Smart Power Meters

Telecommunication Systems

Isolated Bias Supply

Adjustable Output Voltage from 1.225V

Precision 2% Feedback Reference

DESCRIPTION

The LM25019 is a 48V, 100mA synchronous step-down regulator with integrated high side and low side

MOSFETs. The constant-on-time (COT) control scheme employed in the LM25019 requires no loop

compensation, provides excellent transient response, and enables very low step-down ratios. The on-time varies

inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high voltage

startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows

the input undervoltage threshold and hysteresis to be independently programmed. Other protection features

include thermal shutdown and bias supply undervoltage lockout.

The LM25019 is available in LLP-8 and PSOP-8 plastic packages.

Packages

•

LLP-8

PSOP-8

Typical Application

LM25019

9V-48V

VIN

BST

VOUT

RON

UV2

VCC

FB2

UVLO

UV1

RTN

OUT

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...18

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LM25019 替代型号

型号	品牌	替代类型	描述	数据表
LM25011	TI	功能相似	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM5009	TI	功能相似	150-mA 100-V Step-Down Switching Regulator
TPS54062	TI	功能相似	4.7V to 60V Input, 50mA Synchronous Step-Down Converter with Low IQ

与LM25019相关器件

型号	品牌	获取价格	描述	数据表
LM25019MR/NOPB	TI	获取价格	48V, 100mA Constant On-Time Synchronous Buck Regulator
LM25019MRE/NOPB	TI	获取价格	48V, 100mA Constant On-Time Synchronous Buck Regulator
LM25019MRX/NOPB	TI	获取价格	48V, 100mA Constant On-Time Synchronous Buck Regulator
LM25019SD/NOPB	TI	获取价格	48V, 100mA Constant On-Time Synchronous Buck Regulator
LM25019SDE/NOPB	TI	获取价格	48V, 100mA Constant On-Time Synchronous Buck Regulator
LM25019SDX/NOPB	TI	获取价格	48V, 100mA Constant On-Time Synchronous Buck Regulator
LM2501SL	NSC	获取价格	Mobile Pixel Link (MPL) Camera Interface Serializer and Deserializer
LM2502	NSC	获取价格	Mobile Pixel Link (MPL) Display Interface Serializer and Deserializer
LM2502	TI	获取价格	Mobile Pixel Link Display Interface Serializer and Deserializer
LM2502SL	NSC	获取价格	IC LINE TRANSCEIVER, PBGA49, 4 X 4 MM, 1 MM HEIGHT, 0.50 MM PITCH, FBGA-49, Line Driver or

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