Datasheet > RT6338B

RT6338B

更新时间： 2024-04-09 18:58:23

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
51页	1071K
描述
8A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO

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RT6338B 数据手册

RT6338

8A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO

General Description

Features

⚫ Input Voltage Range

The RT6338 family are high efficiency synchronous

step-down DC-DC converters with pseudo constant

switching frequency 500kHz and deliver up to 8A output

current. The RT6338A/B and RT6338AH/BH operate

from 4.5V to 23V input voltage. The output voltage of

RT6338A/AH is programmed between 0.6V to 5.5V and

RT6338B/BH is fixed to 3.3V output voltage. The input

voltage of RT6338C/CH ranges from 5.2V to 23V and

the output voltage of RT6338C/CH is fixed to 5.1V.

 RT6338A/B and RT6338AH/BH : 4.5V to 23V

 RT6338C/CH : 5.2V to 23V

⚫ Output Voltage

 RT6338A/AH : 0.6V to 5.5V

 RT6338B/BH : 3.3V

 RT6338C/CH : 5.1V

⚫ 8A Continuous Output Current

⚫ Stable with POSCAP and MLCC Capacitor

⚫ Fast Transient Response

The RT6338 adopts Advanced Constant On-Time

⚫ Diode Emulation Mode (DEM) for Power Saving

⚫ Ultrasonic Mode (USM) for Avoiding Acoustic

Noise

(ACOT ) control architecture that provides ultra-fast

transient response and further reduces the external

component count. In steady states, the ACOT

⚫ Pseudo Constant Switching Frequency 500kHz in

CCM

operates at nearly constant switching frequency over

line, load and output voltage ranges and makes the EMI

filter design easier.

⚫ Internal Power MOSFET Switch 26m (high-side)

and 14m (low-side)

By setting the voltage of the EN/MODE pin, RT6338

operates either in diode emulation mode (DEM) or

ultrasonic mode (USM) at light load. The USM

maintains operation frequency above 25kHz, which

eliminates the acoustic noise. In the DEM, RT6338

provides the best light-load efficiency and improves the

acoustic noise with spread spectrum function.

⚫ LDO

 RT6338B/BH : 3.3V/100mA

 RT6338C/CH : 5V/100mA

⚫ Over-Current Limit

 RT6338A/AH : Adjustable (10A, 12A or 14A)

 RT6338B/BH/C/CH : 12A

⚫ Output Under-/Over-Voltage Protection (UVP/OVP)

 RT6338A/B/C : Latched Mode UVP/OVP

 RT6338AH/BH/CH : Hiccup Mode UVP and Non-

Latched Mode OVP

RT6338 provides PGOOD indicator for easy system

sequence control. Full protection features are also

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

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

⚫ Input Under-Voltage Lockout (UVLO)

⚫ Over-Temperature Protection (OTP)

 RT6338A/B/C : Latched Mode OTP

 RT6338AH/BH/CH : Non-Latched Mode OTP

All above functions are integrated in a UQFN-23L 3x3

(FC) package.

Applications

⚫ Laptop Computers

⚫ Tablet PCs

⚫ Networking Systems

⚫ Servers

⚫ Personal Video Recorders

⚫ Flat Panel Television and Monitors

⚫ Distributed Power Systems

is a registered trademark of Richtek Technology Corporation.

DS6338-04

August 2023

www.richtek.com

12 3 4 5 6 7...51

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与RT6338B相关器件

型号	品牌	获取价格	描述	数据表
RT6338C	RICHTEK	获取价格	8A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6338E	RICHTEK	获取价格	8A, 23V Synchronous Step-Down Converter with 3.3V LDO
RT6338EH	RICHTEK	获取价格	8A, 23V Synchronous Step-Down Converter with 3.3V LDO
RT6339A	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6339AH	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6339B	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6339BH	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6339C	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6339CH	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6339D	RICHTEK	获取价格	11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO

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