A4447SLJTR-T

更新时间： 2024-09-17 06:35:11

品牌	Logo	应用领域
急速微 - ALLEGRO		稳压器
页数	文件大小	规格书
9页	320K
描述
High Voltage Step Down Regulator

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中文翻译

获取价格

数据手册
替代型号

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A4447SLJTR-T 数据手册

A4447

High Voltage Step Down Regulator

Features and Benefits

Description

▪ Wide input voltage range: 8 to 50 V

▪ Integrated low R_DS(on)DMOS switch

▪ 2 A continuous output current

▪ Adjustable fixed off-time

▪ Highly efficient

▪ Adjustable output: 0.8 to 24 V

▪ Small package with exposed thermal pad

The A4447 is a 2A, high efficiency general-purpose buck

regulatordesignedforawidevarietyofapplications.Theoutput

voltageisadjustablefrom0.8to24V,basedonaresistordivider

and the 0.8 V ±2% reference. External components include

an external clamping diode, inductor, and filter capacitor.

The off-time is determined by an external resistor to ground.

It operates in both continuous and discontinuous modes to

maintain light load regulation. An internal blanking circuit is

used to filter out transients due to the reverse recovery of the

external clamp diode. Typical blanking time is 200 ns.

This new device is ideal for various end products including

applications with 8 to 50 V input voltage range and require up

to 2 A output current, such as uninterruptible power supplies,

point of sale (POS) applications, and industrial applications

with 24 or 36 V bus.

Package: 8 pin SOIC with exposed thermal

pad (suffix LJ)

Applications include:

▪ Printer power supplies

▪ Office automation equipment

▪ POS thermal, laser, photo, and inkjet printers

▪ Tape drives

▪ Industrial applications

Approximate Scale 1:1

Typical Application

+42

CBOOT

0.01 μF

Efficiency vs. Output Current

CIN1

0.22 μF

CIN2

BOOT

ENB

VIN

3.3

L 1

V_OUT

A4447

1.8

1.5

3.3 V

2 A

TSET

GND

VBIAS

RTSET

54 k7

2.87 k7

ESR

V_OUT(V)

COUT

220 μF

25 V

CBYP

0.22 μF

910 7

500

1000

1500

2000

I_OUT(mA)

Data is for reference only. Efficiency data from circuit shown in left panel.

A4447-DS, Rev. 1

12 3 4 5 6 7...9

中文翻译

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A4447SLJTR-T 替代型号

型号	品牌	替代类型	描述	数据表
A8499SLJ-T	ALLEGRO	类似代替	High Voltage Step-Down Regulator
A8499SLJTR-T	ALLEGRO	类似代替	High Voltage Step-Down Regulator

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