Datasheet > RT5779A

RT5779A

更新时间： 2024-11-09 19:33:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
20页	293K
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技术参数
数据手册

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RT5779A 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)：	5	Current Limit (typ) (A)：	7
Freq (typ) (kHz)：	1500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	20	Ron_LS (typ) (mOhm)：	18
Iq (typ) (mA)：	0.035	Features：	100% Duty Cycle;ACOT Control;Fast Transient Response;OCP;PSM;Power Good;UVP
Package Type：	TSOT-28(FC)

RT5779A 数据手册

RT5779A/B

6V, 5A, 1.5MHz ACOT^TMSynchronous Step-Down Converter

in TSOT-23-8 package

General Description

Features

^5A Converter With Built-In 20mΩ/18mΩ Low R_DS(ON)

Power FETs

The RT5779A/B is a simple, easy-to-use, 5Asynchronous

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

RT5779A/B integrates low R_DS(ON)power MOSFETs to

achieve high efficiency and is available in TSOT-23-8 (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 RT5779A/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 RT5779A/B is

designed to operate at 1.5MHz fixed frequency. While

the RT5779A automatically enters power saving mode

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

RT5779B operates in Forced PWM over the loading range,

that helps meet tight voltage regulation accuracy

requirements.

 35μA Operation Quiescent Current (RT5779A)

 Robust Over-Current Protection for Both FETs

 Optional for Operation Modes :

 Power Saving Mode (PSM) (RT5779A)

 Forced PWM Mode (RT5779B)

 Fixed Switching Frequency : 1.5MHz

 Monotonic Start-Up for Pre-Biased Output

 Individual Enable Control Input

 Power Good Indicator

The RT5779A/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

Simplified Application Circuit

VIN

RT5779A/B

OUT

PGOOD

OUT

PGOOD

Enable

PGOOD

VOUT

AGND

PGND

is a registered trademark of Richtek Technology Corporation.

DS5779A/B-00 October 2017

www.richtek.com

12 3 4 5 6 7...20

中文翻译

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与RT5779A相关器件

型号	品牌	获取价格	描述	数据表
RT5779B	RICHTEK	获取价格	6V, 5A, 1.5MHz ACOT® Synchronous Step-Down Co
RT5784A	RICHTEK	获取价格	2A, 6V, 1.5MHz, 25μA IQ, ACOT? Synchronous St
RT5784B	RICHTEK	获取价格	2A, 6V, 1.5MHz, 25μA IQ, ACOT? Synchronous St
RT5785A	RICHTEK	获取价格	暂无描述
RT5785B	RICHTEK	获取价格	2A, 6V, 1.5MHz, 25μA IQ, ACOT® Synchronous St
RT5788A	RICHTEK	获取价格	暂无描述
RT5788B	RICHTEK	获取价格	暂无描述
RT5789A	RICHTEK	获取价格	暂无描述
RT5789B	RICHTEK	获取价格	暂无描述
RT5795A	RICHTEK	获取价格	暂无描述

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