Datasheet > RT2856H

RT2856H

更新时间： 2024-11-05 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
19页	235K
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中文翻译

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技术参数
数据手册

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RT2856H 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	18	Number of Outputs：	1
Vout (min) (V)：	0.8	Vout (max) (V)：
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	6	Current Limit (typ) (A)：	11
Freq (typ) (kHz)：	480	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;Fast Transient Response;Force PWM;OCP;OVP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type：	WQFN3.5x3.5-14A

RT2856H 数据手册

Design

Tools

RT2856H

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 RT2856H 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 RT2856H

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 0.8V 1%, Over −40°C

to 85°C

^Monotonic Start-Up into Pre-biased Outputs

^Adjustable Soft-Start

^Power Good Indicator

^Under-Voltage and Over-Voltage Protection

^Input Under-Voltage Lockout

 RoHS Compliant and Halogen Free

Applications

 High Performance Point of Load Regulation

Marking Information

01= : Product Code

YMDNN : Date Code

 Notebook Computers

01=YM

DNN

 High Density and Distributed Power Systems

Simplified Application Circuit

RT2856H

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.

DS2856H-07 June 2019

www.richtek.com

12 3 4 5 6 7...19

中文翻译

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