Datasheet > BuckConv> RT7272A

RT7272A

更新时间： 2024-01-06 18:30:38

品牌	Logo	应用领域
立锜 - RICHTEK		转换器 TI的电源Demo板
页数	文件大小	规格书
14页	255K
描述
3A, 36V, 500kHz Synchronous Step-Down Converter

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

RT7272A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	36	Number of Outputs：	1
Vout (min) (V)：	0.8	Vout (max) (V)：	30
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	3	Current Limit (typ) (A)：	5.5
Freq (typ) (kHz)：	500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	150	Ron_LS (typ) (mOhm)：	80
Iq (typ) (mA)：	0.9	Features：	Adjustable Current Limit;Current Mode Control;Enable Input;OCP;PSM;Stable with Ceramic Capacitor;UVP
Package Type：	PSOP-8

RT7272A 数据手册

RT7272A

Pin Configurations

Marking Information

RT7272AGSP : Product Number

(TOP VIEW)

RT7272A

GSPYMDNN

YMDNN : Date Code

BOOT

VIN

RLIM

COMP

GND

SOP-8 (Exposed Pad)

Functional Pin Description

Pin No.

Pin Name

Pin Function

Switch Node Connect to external L-C filter.

Bootstrap Supply for High Side Gate Drive. A 100nF or greater capacitor is

recommended to connect from BOOT pin to SW pin.

BOOT

Enable Control Input. A logic-high enables the converter; a logic-low forces the

device into shutdown mode.

Ground. The exposed pad must be soldered to a large PCB and connected to

GND for maximum thermal dissipation.

GND

9 (Exposed Pad)

Feedback Input. This pin is connected to the converter output. It is used to set

the output of the converter to regulate to the desired value via an resistive

divider.

Compensation Node. COMP is used to compensate the regulation control loop.

Connect a series RC network from COMP to GND. In some cases, an additional

capacitor from COMP to GND is required.

COMP

RLIM

VIN

Current Limit Setting. Connect to a resistor to determine current limit.

Power Input. The input voltage range is from 4.5V to 36V. Must bypass with a

suitable large ceramic capacitor.

Function Block Diagram

VIN

Internal

Regulator

Oscillator

Current Sense

Amplifier

Shutdown

Comparator

Slope Comp

Foldback

Control

SENSE

1.2V

0.4V

BOOT

Lockout

Comparator

150mΩ

80mΩ

5kΩ

Comparator

1.7V

Current

Comparator

GND

0.8V

RLIM

COMP

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS7272A-01 January 2013

123 4 5 6 7...14

中文翻译

下载PDF

与RT7272A相关器件

型号	品牌	描述	获取价格	数据表
RT7272AGSP	RICHTEK	IC REG BUCK ADJ 3A SYNC 8SOP	获取价格
RT7272B	RICHTEK	3A, 36V, 500kHz Synchronous Step-Down Converter	获取价格
RT7272B-05	RICHTEK	3A, 36V, 500kHz Synchronous Step-Down Converter	获取价格
RT7272BGSP	RICHTEK	IC REG BUCK ADJ 3A SYNC 8SOP	获取价格
RT7273	RICHTEK	暂无描述	获取价格
RT7273-04	RICHTEK	3-CH, 18V, Synchronous Step-Down Converter	获取价格