Datasheet > RT6278A

RT6278A

更新时间： 2024-09-25 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
19页	322K
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RT6278A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	23	Number of Outputs：	1
Vout (min) (V)：	0.6	Vout (max) (V)：	6
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	8	Current Limit (typ) (A)：	10;12;8
Freq (typ) (kHz)：	500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	24	Ron_LS (typ) (mOhm)：	12
Iq (typ) (mA)：	0.13	Features：	ACOT Control;Adjustable Current Limit;Fast Transient Response;OCP;OVP;PSM;Power Good;UVP;Ultrasonic Mode Control
Package Type：	UQFN3x3-12H(FC)

RT6278A 数据手册

RT6278A/B

23V, 8A, 500kHz ACOT^TMSynchronous Step-Down Converter

General Description

Features

^8A Converter With Built-In 24mΩ/12mΩ Low R_DS(ON)

Power FETs

The RT6278A/B is a simple, easy-to-use, 8Asynchronous

step-downDC-DC converter with an input supply voltage

range of 4.5V to 23V. The device build-in an accurate 0.6V

reference voltage and integrates low R_DS(ON)power

MOSFETs to achieve high efficiency in a UQFN-12HL 3x3

package. The RT6278A/B adoptsAdvanced Constant On-

Time (ACOT^TM) control architecture to provide an ultrafast

transient response with few external components and to

operate in nearly constant switching frequency over the

line, load, and output voltage range. The RT6278Aoperates

in automatic PSM that maintains high efficiency during

light load operation. The RT6278B operates in Forced

PWM that helps meet tight voltage regulation accuracy

requirements. The RT6278A/B senses both FETs current

for a robust over-current protection. It features cycle-by-

cycle current limit protection and prevent the device from

the catastrophic damage in output short circuit, over current

or inductor saturation.Abuilt-in soft-start function prevents

inrush current during start-up. The device also includes

input under-voltage lockout, output under-voltage

protection, over-voltage protection, and over-temperature

protection (thermal shutdown) to provide safe and smooth

operation in all operating conditions. The RT6278A/B is

offered in a UQFN-12HL 3x3(FC) package.

^Input Supply Voltage Range : 4.5V to 23V

^Output Voltage Range : 0.6V to 6V

^Advanced Constant On-Time (ACOT^TM) Control

^Ultrafast Transient Response

^No Needs For External Compensations

^Optimized for Low-ESR Ceramic Output Capacitors

^0.6V 1% High-Accuracy Feedback Reference

Voltage

^Optional for Operation Modes :

^Power Saving Mode (PSM) (RT6278A)

 Forced PWM Mode (RT6278B)

 Fixed Switching Frequency : 500kHz

 Built-In Internally Fixed Soft-Start (Typ. 0.4ms)

 Input Under-Voltage Lockout (UVLO)

 Output Under-Voltage Protection (UVP) with Hiccup

Mode

 Output Over-Voltage Protection (OVP) with Auto-

Recovery Mode

 Ultrasonic Mode (USM) for RT6278A

 Available In UQFN-12HL 3x3 (FC) (U-Type) Package

Ordering Information

RT6278A/B

Applications

Package Type

 Industrial and Commercial Low Power Systems

QUF : UQFN-12HL 3x3 (FC) (U-Type)

 Computer Peripherals

Lead Plating System

G : Green (Halogen Free and Pb Free)

 LCDMonitors and TVs

 Green Electronics/Appliances

 Point of Load Regulation for High-Performance DSPs,

FPGAs, and ASICs

UVP Option

H : Hiccup

PWM Operation Mode

A : Automatic PSM

B: Forced PWM

 Networking Communication

Note :

Richtek products are :

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

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

is a registered trademark of Richtek Technology Corporation.

DS6278A/B-01 May 2018

www.richtek.com

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与RT6278A相关器件

型号	品牌	获取价格	描述	数据表
RT6278B	RICHTEK	获取价格	暂无描述
RT6280A	RICHTEK	获取价格	23V, 10A, 500kHz ACOT® Synchronous Step-Down
RT6280B	RICHTEK	获取价格	暂无描述
RT6283B	RICHTEK	获取价格	暂无描述
RT6285	RICHTEK	获取价格	5A, 30V, 500kHz Asynchronous Step-Down Converter
RT6296A	RICHTEK	获取价格	暂无描述
RT6296B	RICHTEK	获取价格	2A, 17V Current Mode Synchronous Step-Down Converter
RT6296BGJ8F	RICHTEK	获取价格	IC REG BUCK ADJ 2A SYNC TSOT23-8
RT6296C	RICHTEK	获取价格	2A, 17V Current Mode Synchronous Step-Down Converter
RT6296D	RICHTEK	获取价格	暂无描述

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