Datasheet > RT7291B

RT7291B

更新时间： 2024-01-29 16:40:04

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
18页	228K
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RT7291B 技术参数

Status：	Active	Vin (min) (V)：	5
Vin (max) (V)：	23	Number of Outputs：	1
Vout (min) (V)：	5.049	Vout (max) (V)：	5.151
Preset Vout (V)：		Output Adj. Method：	Fixed
Iout (max) (A)：	6	Current Limit (typ) (A)：
Freq (typ) (kHz)：	500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	31	Ron_LS (typ) (mOhm)：	20
Iq (typ) (mA)：	0.1	Features：	ACOT Control;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Low Dropout;OCP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type：	UQFN3x3-16(FC)	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7291AB-03.pdf

RT7291B 数据手册

RT7291A/B

6A, 23V, 500kHz, ACOT^TMSynchronous Buck Converter

with LDO for System 5V

General Description

Features

^5V to 23V Input Voltage Range

^Up to 98% Duty for 2S Battery Application

^PWM Frequency Fixed 500kHz

^ACOT^TMMode Performs Fast Transient Response

^Integrated MOSFETs

The RT7291A/B is a synchronous Buck converter with

Advanced Constant On-Time (ACOT^TM) mode control. The

main control loop of the RT7291A/B uses an ACOT^TM

mode control which provides a very fast transient response

with no external compensators. The RT7291A/B operates

from 5V to 23V input voltage, provides a 5V LDO and a

300kHz CLK to drive an external charge pump. OCP, UVP

and OVP are included in the RT7291A/B. This IC also

provides a 1.5ms internal soft-start function and an open-

drain power good indicator.

 31mΩ of High-Side MOSFET

 20mΩ of Low-Side MOSFET

^Support Output MLCC Stable

^Internal Soft-Start (1.5ms typ)

^Built-in OVP/UVP/OCP

^Power Good Indicator

 Fixed 300kHz VCLK to Support Charge Pump

 Individual EN for PWM and LDO

 Thermal Shutdown

Applications

 Laptop Computers

 Tablet PCs

 Networking Systems

 Servers

 Personal Video Recorders

 Flat Panel Television and Monitors

 Distributed Power Systems

Simplified Application Circuit

OUT

CLK

RT7291A/B

BOOT

VIN

OUT

LDO

OUT

LDO

OUT

VOUT

PGND

BYP

VBYP

PGOOD

BYP

PGOOD

VCC

ENLDO

AGND

VCC

is a registered trademark of Richtek Technology Corporation.

DS7291A/B-03 January 2018

www.richtek.com

12 3 4 5 6 7...18

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