Datasheet > RT6243B

RT6243B

更新时间： 2024-11-13 16:37:07

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
31页	671K
描述
12A, 17V, High Efficiency Synchronous Step-Down Converter

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技术参数
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RT6243B 技术参数

Status：	Active	Vin (min)(V)：	4.5
Vin (max)(V)：	17	Number of Outputs：	1
Vout (min)(V)：	0.6	Vout (max)(V)：	5.5
Preset Vout(V)：		Output Adj. Method：	Resistor
Iout (max)(A)：	12	Current Limit (typ)(A)：	11.5;13.8
Freq (typ)(kHz)：	1200;400;800	Freq (min)(kHz)：
Freq (max)(kHz)：		Ext Sync：	No
Ron_HS (typ)(mOhm)：	9.8	Ron_LS (typ)(mOhm)：	4.5
Iq (typ)(mA)：	0.6	Features：	ACOT Control;Adjustable Frequency;Adjustable Soft-Start;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OTP;Power Good;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP
Package Type：	VQFN3.5x3.5-18(FC)

RT6243B 数据手册

RT6243A/B

12A, 17V, High Efficiency Synchronous Step-Down Converter

General Description

Features

^4.5V to 17V Input Voltage Range

^Integrated 9.8mΩ/4.5mΩ MOSFETs

^0.6V 1% Voltage Reference

The RT6243A/B is a high-performance, synchronous step-

down converter that can deliver up to 12A output current

with an input supply voltage range of 4.5V to 17V. The

device integrates low R_DS(ON)power MOSFETs, accurate

0.6V reference and an integrated diode for bootstrap circuit

to offer a very compact solution.

^Adjustable Output Voltage from 0.6V to 5.5V

^Supports Ceramic Output Capacitor

^ACOT^TMControl for Fast Transient Response

^Selectable Switching Frequency (400kHz/800kHz/

1200kHz)

The RT6243A/B adopts Advanced Constant On-Time

(ACOT^TM) control architecture that provides ultrafast

transient response and further reduce the external-

component count. In steady states, theACOT^TMoperates

in nearly constant switching frequency over line, load and

output voltage ranges and makes the EMI filter design

easier.

^Selectable Current Limit Level

^Power Good Indicator

^Programmable Soft-Start Time with a Default 1ms

^Monotonic Start-Up into Pre-Biased Outputs

 18-Lead VQFN (FC) Package

The device offers a variety of functions for more design

flexibility. The selectable switching frequency, current limit

level and PWM operation modes makes the RT6243A/B

easy-to-use over wide application range. Independent

enable control input pin and power good indicator are also

provided for easy sequence control. To control the inrush

current during the startup, the device provides a

programmable soft start-up by an external capacitor

connected to the SS pin. Fully protection features are

also integrated in the device including the cycle-by-cycle

current limit, OVP, UVP, input UVLO and OTP.

Applications

 Server, Storage andNetwork Equipment

 Telecom Infrastructure

 Point of Load (POL) Power Modules

 HighDensityDC-DC Converters

 High End Digital TV

Pin Configuration

(TOP VIEW)

The RT6243A/B is available in a thermally enhancedVQFN-

18L 3.5x3.5 (FC) package.

18 17 16 15 14 13

AGND

VIN

BOOT

VIN

Marking Information

RT6243AGQVF

PGND

1A= : Product Code

YMDNN : Date Code

1A=YM

DNN

VQFN-18L 3.5x3.5 (FC)

RT6243BGQVF

19= : Product Code

YMDNN : Date Code

19=YM

DNN

is a registered trademark of Richtek Technology Corporation.

DS6243A/B-01 June 2019

www.richtek.com

12 3 4 5 6 7...31

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与RT6243B相关器件

型号	品牌	获取价格	描述	数据表
RT6245A	RICHTEK	获取价格	14A, 17V, 400kHz/800kHz/1200kHz Synchronous Step-Down Converter with VID Control
RT6245B	RICHTEK	获取价格	14A, 17V, 400kHz/800kHz/1200kHz Synchronous Step-Down Converter with VID Control
RT6246B	RICHTEK	获取价格	暂无描述
RT6248B	RICHTEK	获取价格	暂无描述
RT6250A	RICHTEK	获取价格	暂无描述
RT6250B	RICHTEK	获取价格	暂无描述
RT6251A	RICHTEK	获取价格	暂无描述
RT6251B	RICHTEK	获取价格	暂无描述
RT6252A	RICHTEK	获取价格	暂无描述
RT6252B	RICHTEK	获取价格	暂无描述

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