Datasheet > RT5744A

RT5744A

更新时间： 2024-11-06 17:00:35

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
38页	1373K
描述
2.4MHz 4A/6A Step-Down Converter with I2C Interface

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RT5744A 数据手册

RT5744/RT5746

2.4MHz 4A/6A Step-Down Converter with I²C Interface

Features

General Description

⚫ Programmable Output Voltage Range

The RT5744 and RT5746 are step-down switching

voltage regulators that deliver a digitally programmable

output from an input voltage supply of 2.5V to 5.5V. The

 0.27V to 1.4V, 6.25mV/bit

⚫ Programmable Slew Rate for Voltage Transitions

⚫ Steady 2.4MHz Switching Frequency

⚫ Fast Load Transient

output voltage is programmed through an I C interface

that can operate up to 3.4MHz.

⚫ Continuous Output Current Capability: 4A/6A

⚫ 2.5V to 5.5V Input Voltage Range

⚫ Digitally Programmable Output Voltage

Using a proprietary architecture with synchronous

rectification, the RT5744 and RT5746 are capable of

delivering continuous 4A and 6A, maintaining that

efficiency at load currents as low as 10mA. The

regulator operates at a nominal fixed frequency of

2.4MHz, which reduces the external component counts.

Additional output capacitance can be added to improve

regulation during load transients without affecting

stability.

⚫ I C-Compatible Interface Up to 3.4Mbps

⚫ PFM Mode for High Efficiency at Light Load

⚫ Quiescent Current in PFM Mode: 45A (Typical)

⚫ Input Undervoltage Lockout (UVLO)

⚫ Thermal Shutdown and Overload Protection

⚫ Power Good Indicator

At moderate and light loads, Pulse Frequency

Modulation (PFM) is used to operate in power-saving

mode with a typical quiescent current of 45A at room

temperature. Even with such a low quiescent current,

the part exhibits excellent transient response during

large load swings. At higher loads, the system

automatically switches to fixed frequency control,

operating at 2.4MHz. In shutdown mode, the supply

current is typically 0.1A, and is excellent in reducing

power consumption. The PFM mode can be disabled if

the fixed frequency is desired. The RT5744 and RT5746

are available in WL-CSP-14B 1.31x2.02 (BSC) package.

Applications

⚫ Application, Graphic, and DSP Processors

⚫ ARM , Tegra , OMAP , NovaThor

ARMADA , Krait , etc.

⚫ Hard Disk Drives, LPDDR3, LPDDR4, LPDDR5

⚫ Tablets, Netbooks, Ultra-Mobile PCs

⚫ Smart Phones

⚫ Gaming Devices

The recommended junction temperature range is −40C

to 125C.

Simplified Application Circuit

RT5744/

VIN RT5746

A1,B1, C1

A2, B2

OUT

Remote

VOUT

SDA

SCL

Enable

Signal

I C Control

VSEL

Signal

Output

AGND PGND

E1 A3, B3

is a registered trademark of Richtek Technology Corporation.

DS5744/DS5746-00

November

2023

www.richtek.com

12 3 4 5 6 7...38

中文翻译

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与RT5744A相关器件

型号	品牌	获取价格	描述	数据表
RT5744B	RICHTEK	获取价格	2.4MHz 4A/6A Step-Down Converter with I2C Interface
RT5746A	RICHTEK	获取价格	2.4MHz 4A/6A Step-Down Converter with I2C Interface
RT5750A	RICHTEK	获取价格	6V 1A, ACOT? Buck Converter
RT5750B	RICHTEK	获取价格	6V 1A, ACOT? Buck Converter
RT5751A	RICHTEK	获取价格	6V 1A, ACOT? Buck Converter
RT5751B	RICHTEK	获取价格	6V 1A, ACOT? Buck Converter
RT5751C	RICHTEK	获取价格	6V 1.5A, ACOT? Buck Converter
RT5751D	RICHTEK	获取价格	6V 1.5A, ACOT? Buck Converter
RT5752A	RICHTEK	获取价格	2A, 1.2MHz, 6V Synchronous Step-Down Converter inTSOT-23-5/TSOT-23-6 and WDFN-6L 2x2
RT5752B	RICHTEK	获取价格	2A, 1.2MHz, 6V Synchronous Step-Down Converter inTSOT-23-5/TSOT-23-6 and WDFN-6L 2x2

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