Datasheet > UMK325BJ475MM-T

UMK325BJ475MM-T

更新时间： 2024-09-15 12:23:39

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
13页	337K
描述
5A, 32V, 500kHz Step-Down Converter

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数据手册

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UMK325BJ475MM-T 数据手册

RT8289

5A, 32V, 500kHz Step-Down Converter

General Description

Features

^zHigh Output Current up to 5A

The RT8289 is a step-down regulator with an internal Power

MOSFET. It achieves 5Aof continuous output current over

a wide input supply range with excellent load and line

regulation. Current mode operation provides fast transient

response and eases loop stabilization.

^zInternal Soft-Start

^z100mΩ Internal Power MOSFET Switch

^zInternal Compensation Minimizes External Parts

Count

^zHigh Efficiency up to 90%

The RT8289 prorides protections such as cycle-by-cycle

current limiting and thermal shutdown. In shutdown mode,

the regulator draws 25A of supply current.

^z25μA Shutdown Current

^zFixed 500kHz Frequency

^zThermal Shutdown Protection

The RT8289 requires a minimum number of external

components, to proride a compact solution.

^zCycle-by-Cycle Over Current Protection

^zWide 5.5V to 32V Operating Input Range

^zAdjustable Output Voltage from 1.222V to 26V

z Available in an SOP-8 (Exposed Pad) Package

z RoHS Compliant and Halogen Free

The RT8289 is available in a SOP-8 (Exposed Pad)

package.

Ordering Information

RT8289

Applications

z Distributive Power Systems

Package Type

SP : SOP-8 (Exposed Pad-Option 1)

z LCD TV

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

z DSL Modems

z Pre-regulator for Linear Regulators

z Battery Charger

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Pin Configurations

(TOP VIEW)

` Suitable for use in SnPb or Pb-free soldering processes.

BOOT

VIN

GND

SOP-8 (Exposed Pad)

Typical Application Circuit

BOOT

RT8289

VIN

5.5V to 32V

10nF

BOOT

10µH

4.7µF x 2

OUT

5V/5A

Chip Enable

B550C

10k

OUT

Open

= Automatic Startup

47µFx2

(POSCAP)

6, Exposed Pad (9)

GND

3.16k

DS8289-01 March 2011

www.richtek.com

12 3 4 5 6 7...13

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