Datasheet > LM5019_14

LM5019_14

更新时间： 2024-11-15 02:58:23

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
17页	419K
描述
100 V, 100 mA Constant On-Time Synchronous Buck Regulator

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LM5019_14 数据手册

February 6, 2012

LM5019

100V, 100mA Constant On-Time Synchronous Buck

Regulator

General Description

Features

The LM5019 is a 100V, 100mA synchronous step-down reg-

ulator with integrated high side and low side MOSFETs. The

constant-on-time (COT) control scheme employed in the

LM5019 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.

Wide 9V to 100V Input Range

■

Integrated 100V, High and Low Side Switches

No Schottky Required

Constant On-Time Control

No Loop Compensation Required

Ultra-Fast Transient Response

Nearly Constant Operating Frequency

Intelligent Peak Current Limit

A peak current limit circuit protects against overload condi-

tions. The undervoltage lockout (UVLO) circuit allows the

input undervoltage threshold and hysteresis to be indepen-

dently programmed. Other protection features include ther-

mal shutdown and bias supply undervoltage lockout.

Adjustable Output Voltage from 1.225V

Precision 2% Feedback Reference

Frequency Adjustable to 1MHz

Adjustable Undervoltage Lockout

The LM5019 is available in LLP-8 and PSOP-8 plastic pack-

ages.

Remote Shutdown

■

Thermal Shutdown

■

Packages

LLP-8

■

PSOP-8

Applications

Smart Power Meters

■

Telecommunication Systems

Automotive Electronics

Isolated Bias Supply

Typical Application

30181701

FIGURE 1.

301817 SNVS788B

www.ti.com

12 3 4 5 6 7...17

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