Datasheet > FR9809

FR9809

更新时间： 2024-02-20 17:11:36

品牌	Logo	应用领域
天钰科技 - FITIPOWER		/
页数	文件大小	规格书
13页	1241K
描述
21V, 5A, 500KHz Synchronous PWM-Buck DC/DC Converter

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FR9809 数据手册

fitipower integrated technology lnc.

FR9809

21V, 5A, 500KHz Synchronous PWM-Buck

DC/DC Converter

Description

Features

FR9809 is a high-efficiency synchronous step-down

DC/DC converter that employs a special process

technique to obtain very low R_DS(ON) for the internal

metal–oxide–semiconductor field-effect transistor

(MOSFET). The input operation voltage is in a wide

range from 4.75V to 21V, and continuous load

current capability is 5A. Control circuit is designed

by a particular current mode which provides fast

transient response and eases loop stabilization.

 High Efficiency up to 90%

 Internal MOSFET R_DS(ON): 110mΩꢄ20mΩ

 Internal Compensation

 Input Operation Voltage Range: 4.75V to 21V

 5A Continuous Output Current

 Output Voltage down to 0.805V

 500KHz Oscillation Frequency

 Sync to External Clock from 300KHz to 800KHz

 Cycle-by-Cycle Current Limit

 Under Voltage Lockout

This product has a very low standby current less

 Over-Temperature Protection with Auto Recovery

 <1μA Shutdown Current

 Thermal Enhanced SOP-8 (Exposed Pad)

Package

than 1μA in shutdown mode. When the ꢀꢁꢂꢃꢄꢀ

pin voltage is less than 0.4V, FR9809 will turn off.

Fault protection includes over current protection

(OCP), under voltage lockout protection (UVLO) and

over temperature protection (OTP) function.

 RoHS Compliant

Applications

 Networking Equipment

 OLPC, Netbook

This high-efficiency current mode step-down “Green

Power Converter” offers the standard SOP-8

package with an exposed pad.

 Distributed Power System

 LCD Monitor, TV, STB

 External HDD

 Security System

Pin Assignments

Ordering Information

FR9809□□□

SP Package (SOP-8 Exposed Pad)

TR: Tape/Reel

G: Green

C: Green

VIN

GND

VCC

GND

Package Type

SP: SOP-8 (Exposed Pad)

SHDN/S

BST

Figure 1. Pin Assignment of FR9809

FR9809-Preliminary 0.4-OCT-2012

12 3 4 5 6 7...13

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