Datasheet > RT5789B

RT5789B

更新时间： 2024-11-21 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
20页	315K
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RT5789B 技术参数

Status：	Active	Vin (min) (V)：	2.5
Vin (max) (V)：	6	Number of Outputs：	1
Vout (min) (V)：	0.6	Vout (max) (V)：	6
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	6	Current Limit (typ) (A)：	7.5
Freq (typ) (kHz)：	1500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	18	Ron_LS (typ) (mOhm)：	16
Iq (typ) (mA)：	0.6	Features：	ACOT Control;Cycle-by-Cycle Current Limit;Force PWM;OCP;Power Good;UVP
Package Type：	TSOT-28(FC);UDFN2.5x2-8(FC)

RT5789B 数据手册

RT5789A/B

6V, 6A, 1.5MHz ACOT^TMSynchronous Step-Down Converter

in 2.5mm x 2mm Package

General Description

Features

^6A Converter With Built-In 18mΩ/16mΩ Low R_DS(ON)

Power FETs

The RT5789A/B is a simple, easy-to-use, 6Asynchronous

step-downDC-DC converter with an input supply voltage

range of 2.5V to 6V. The device build-in an accurate 0.6V

( 1.5%) reference voltage and can operate in 100% duty

cycle as a very low dropout voltage regulator. the

RT5789A/B integrates low R_DS(ON)power MOSFETs to

achieve high efficiency and is available in TSOT-23-8 (FC)

package and UDFN-8L 2.5x2(FC) package.

^Input Supply Voltage Range : 2.5V to 6V

^Output Voltage Range : 0.6V to 6V

^Operates Up to 100% Duty Cycle

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

^Ultrafast Transient Response

^No Needs For External Compensations

^Optimized for Low-ESR Ceramic Output Capacitors

^0.6V 1.5% High-Accuracy Feedback Reference

Voltage

The RT5789A/B adopts Advanced 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 RT5789A/B is

designed to operate at 1.5MHz fixed frequency. While

the RT5789A automatically enters power saving mode

(PSM) operation at light load to maintain high efficiency.

RT5789B operates in Forced PWM over the loading range,

that helps meet tight voltage regulation accuracy

requirements.

 35μA Operation Quiescent Current (RT5789A)

 Robust Over-Current Protection for Both FETs

 Optional for Operation Modes :

 Power Saving Mode (PSM) (RT5789A)

 Forced PWM Mode (RT5789B)

 Fixed Switching Frequency : 1.5MHz

 Monotonic Start-Up for Pre-Biased Output

 Individual Enable Control Input

 Power Good Indicator

The RT5789A/B senses both FETs current for a robust

over-current protection. It prevents the device from the

catastrophic damage in output short circuit, over current

or inductor saturation. The individual enable control input

and power good indicator provides flexible system power

sequence control a built-in soft-start function prevents

inrush current during start-up. The device also includes

input under-voltage lockout, output under-voltage

protection, and over-temperature protection (thermal

shutdown) to provide safe and smooth operation in all

operating conditions.

 Built-In Internally Fixed Soft-Start (Typ. 1.5ms)

 100% Duty Cycle Mode

 Internal Output Discharge

 Input Under-Voltage Lockout (UVLO)

 Output Under-Voltage Protection (UVP) with Hiccup

Mode

 Over-Temperature Protection

 Available in TSOT-23-8 (FC) Package and UDFN-8L

2.5x2 (FC) Package

Simplified Application Circuit

VIN

RT5789A/B

OUT

PGOOD

OUT

PGOOD

Enable

PGOOD

VOUT

AGND

PGND

is a registered trademark of Richtek Technology Corporation.

DS5789A/B-02 March 2018

www.richtek.com

12 3 4 5 6 7...20

中文翻译

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与RT5789B相关器件

型号	品牌	获取价格	描述	数据表
RT5795A	RICHTEK	获取价格	暂无描述
RT5796A	RICHTEK	获取价格	暂无描述
RT5796B	RICHTEK	获取价格	1.5A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
RT5796C	RICHTEK	获取价格	1.5A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
RT5796D	RICHTEK	获取价格	1.5A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
RT5797A	RICHTEK	获取价格	3A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
RT5797B	RICHTEK	获取价格	3A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
RT5800	RICHTEK	获取价格	暂无描述
RT5C348B	RICOH	获取价格	4-WIRE SERIAL INTERFACE
RT5C475A	ETC	获取价格	PC Card Support

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