Datasheet > SM72485SD

SM72485SD

更新时间： 2024-11-26 09:22:15

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器开关
页数	文件大小	规格书
16页	434K
描述
SolarMagic 100V, 150 mA Constant On-Time Buck Switching Regulator

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SM72485SD 数据手册

May 10, 2011

SM72485

SolarMagic 100V, 150 mA Constant On-Time Buck

Switching Regulator

Operating frequency remains constant with varying line

voltage and load current

Adjustable output voltage from 2.5V

Highly efficient operation

Precision internal reference

Low bias current

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General Description

The SM72485 Step Down Switching Regulator features all of

the functions needed to implement a low cost, efficient, Buck

bias regulator. This high voltage regulator contains an 100 V

N-Channel Buck Switch. The device is easy to implement and

is provided in the MSOP-8 and the thermally enhanced LLP-8

package. The regulator is based on a control scheme using

an ON time inversely proportional to V_IN. This feature allows

the operating frequency to remain relatively constant. The

control scheme requires no loop compensation. An intelligent

current limit is implemented with forced OFF time, which is

inversely proportional to Vout. This scheme ensures short

circuit control while providing minimum foldback. Other fea-

tures include: Thermal Shutdown, V_CCunder-voltage lockout,

Gate drive under-voltage lockout, Max Duty Cycle limiter, and

a pre-charge switch.

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Intelligent current limit

Thermal shutdown

Typical Applications

PV Panel Smart Junction Boxes

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Non-Isolated Telecommunication Buck Regulator

Secondary High Voltage Post Regulator

+42V Automotive Systems

Package

Features

MSOP - 8

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Renewable Energy Grade

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LLP - 8 (4mm x 4mm)

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Operating input voltage range: 6V to 95V

Integrated 100V, N-Channel buck switch

Internal start-up regulator

No loop compensation required

Ultra-Fast transient response

On time varies inversely with input voltage

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Typical Application, Basic Step-Down Regulator

30142301

301423

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与SM72485SD相关器件

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