Datasheet > RT7298B

RT7298B

更新时间： 2024-09-17 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
21页	272K
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技术参数
数据手册

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RT7298B 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	18	Number of Outputs：	1
Vout (min) (V)：	0.6	Vout (max) (V)：	5
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	6	Current Limit (typ) (A)：	11
Freq (typ) (kHz)：	500	Freq (min) (kHz)：	200
Freq (max) (kHz)：	1600	Ext Sync：	Yes
Ron_HS (typ) (mOhm)：	26	Ron_LS (typ) (mOhm)：	19
Iq (typ) (mA)：	0.6	Features：	100% Duty Cycle;Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;Force PWM;OCP;OVP;Power Good;UVP
Package Type：	WQFN3.5x3.5-14A

RT7298B 数据手册

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RT7298B

6A, 18V, Synchronous Step-Down Converter

General Description

Features

^Low R_DS(ON)Power MOSFET Switches 26mΩ/19mΩ

^Input Voltage Range : 4.5V to 18V

^Adjustable Switching Frequency : 200kHz to 1.6MHz

^Current-Mode Control

The RT7298B is a high efficiency, monolithic synchronous

step-downDC-DC converter that can deliver up to 6Aoutput

current from a 4.5V to 18V input supply. The RT7298B

current-mode architecture with external compensation

allows the transient response to be optimized over a wide

range of loads and output capacitors. Cycle-by-cycle

current limit provides protection against shorted outputs

and soft-start eliminates input current surge during start-

up. Fault condition protections include output under-voltage

protection, output over-voltage protection, and over-

temperature protection. The low current shutdown mode

provides output disconnection, enabling easy power

management in battery-powered systems.

^Synchronous to External Clock : 200kHz to 1.6MHz

^Accurate Voltage Reference 0.6V 1%

^Monotonic Start-Up into Pre-biased Outputs

^Adjustable Soft-Start

^Power Good Indicator

^Selectable Hiccup Mode and Latch-Off Mode

Under-Voltage Protection

^Over-Temperature and Over-Voltage Protection

 Input Under-Voltage Lockout

 RoHS Compliant and Halogen Free

Applications

 High Performance Point of Load Regulation

 Notebook Computers

 High Density and Distributed Power Systems

Simplified Application Circuit

RT7298B

BOOT

VIN

BOOT

PVIN

OUT

Enable

OUT

PGOOD

COMP1

OSC

COMP

RT/SYNC

SS/TR

COMP1

COMP2

GND

is a registered trademark of Richtek Technology Corporation.

DS7298B-07 June 2019

www.richtek.com

12 3 4 5 6 7...21

中文翻译

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