Datasheet > RT7255A

RT7255A

更新时间： 2024-01-27 08:48:45

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
17页	1292K
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中文翻译

获取价格

技术参数
数据手册

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RT7255A 技术参数

Status：	Preview	Vin (min) (V)：	4.3
Vin (max) (V)：	18	Number of Outputs：	1
Vout (min) (V)：	0.6	Vout (max) (V)：	8
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	1.5	Current Limit (typ) (A)：	2.2
Freq (typ) (kHz)：	500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	230	Ron_LS (typ) (mOhm)：	130
Iq (typ) (mA)：	0.5	Features：	ACOT Control;Adjustable Soft-Start;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Fast Transient Response;Force PWM;Stable with Ceramic Capacitor;UVP
Package Type：	TSOT-28

RT7255A 数据手册

RT7255

Pin Configurations

Ordering Information

RT7255

(TOP VIEW)

Package Type

J8 : TSOT-23-8

Lead Plating System

G : Green (Halogen Free and Pb Free)

A : Hiccup + PSM

C : Hiccup + PWM

Note :

Richtek products are :

 RoHS compliant and compatible with the current

TSOT-23-8

requirements of IPC/JEDEC J-STD-020.

Marking Information

 Suitable for use in SnPb or Pb-free soldering

processes.

RT7255AGJ8

07= : Product Code

DNN : Date Code

07=DNN

Applications

 Industrial and Commercial Low Power Systems

RT7255CGJ8

05=DNN

 Computer Peripherals

05= : Product Code

DNN : Date Code

 LCD Monitors and TVs

 Green Electronics/Appliances

 Point of Load Regulation for High-Performance

DSPs, FPGAs, and ASICs

Functional Pin Description

Pin No.

Pin Name

Pin Function

Bootstrap supply for high-side gate driver. Connect a 1F ceramic capacitor

between the BOOT and SW pins.

BOOT

Soft-start time setting. Connect a capacitor from SS to GND to set the soft-start

period.

GND

Power ground.

Feedback voltage input. The pin is used to set the output voltage of the

converter via a resistive divider. The converter regulates V_FBto 0.6V.

PGOOD

Power good indicator output.

Enable control input. Connect EN to a logic-high voltage to enable the IC or to a

logic-low voltage to disable. Do not leave this high impedance input

unconnected. For automatic start up, connect the EN pin to VIN with a 100k

resistor.

Power input. The input voltage range is from 4.3V to 18V. Must bypass with

a suitable large ceramic capacitor at this pin.

VIN

Switch node. Connect to external L-C filter.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS7255-01 November 2017

123 4 5 6 7...17

中文翻译

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