Datasheet > RT6253A

RT6253A

更新时间： 2024-02-14 13:50:24

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
32页	1836K
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技术参数
数据手册

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RT6253A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	17	Number of Outputs：	1
Vout (min) (V)：	0.765;0.807	Vout (max) (V)：	7
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	3	Current Limit (typ) (A)：	4.2;4.4
Freq (typ) (kHz)：	580	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	95	Ron_LS (typ) (mOhm)：	50
Iq (typ) (mA)：	0.28;0.295	Features：	ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;PSM;SCP;Stable with Ceramic Capacitor;UVP
Package Type：	TSOT-26(FC);SOT-563(FC)

RT6253A 数据手册

RT6253A/B

17V Input, 3A, ACOT^TMBuck Converter with Both FETs OC

Protection

General Description

Features

The RT6253A/B is

simple, easy-to-use, 3A

 Integrated 95m and 50m FETs

synchronous step-down DC-DC converter with an input

supply voltage range of 4.5V to 17V. The device

possesses an accurate reference voltage and

integrates low R_DS(ON)power MOSFETs to achieve

high efficiency.

 Continuous Current

 TSOT-23-6 (FC) : 3A

 SOT-563 (FC) : 2.5A

 Input Supply Voltage Range : 4.5V to 17V

 Maximum Output Voltage Range : 7V

 Advanced Constant On-Time (ACOT^TM) Control

 Ultrafast Transient Response

 Optimized for Low-ESR Ceramic Output

Capacitors

The RT6253A/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 RT6253A

operates in automatic PSM that maintains high

efficiency during light load operation. The RT6253B

operates in Forced PWM that helps meet tight voltage

regulation accuracy requirements.

 High Accuracy Feedback Reference Voltage :

1%

 Optional for Operation Modes :

 RT6253A : Power Saving Mode (PSM)

 RT6253B : Forced PWM Mode

The RT6253A/B senses both FETs current for a robust

over-current protection (OCP). The device features

cycle-by-cycle current limit protection to prevent the

device from the catastrophic damage in output short

circuit, over-current or inductor saturation conditions. 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 (OTP) to provide safe and

smooth operation in all operating conditions.

 Fixed Switching Frequency : 580kHz

 Enable Control and Fixed Soft-Start with typ.

1ms

 Safe Start-Up from Pre-biased Output

 Input Under-Voltage Lockout (UVLO)

 Protection Function

 Output Under-Voltage Protection (UVP) with

Hiccup Mode

 High- / Low-side MOSFET OCP and OTP

Function

 RoHS Compliant and Halogen Free

Simplified Application Circuit

BOOT

RT6253A/B

(Optional)

VIN

BOOT

OUT

Enable

FB1

GND

FB2

is a registered trademark of Richtek Technology Corporation.

DS6253A/B-01 September 2019

www.richtek.com

12 3 4 5 6 7...32

中文翻译

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与RT6253A相关器件

型号	品牌	获取价格	描述	数据表
RT6253B	RICHTEK	获取价格	暂无描述
RT6254A	RICHTEK	获取价格	ACOT Step-Down Converter
RT6254AHGJ6F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6254AHGJ8F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6254B	RICHTEK	获取价格	4A, 18V, 500kHz, ACOT® Step-Down Converter
RT6254BHGJ6F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6254BHGJ8F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6255A	RICHTEK	获取价格	暂无描述
RT6255AHGJ6F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6255AHGJ8F	RICHTEK	获取价格	ACOT Step-Down Converter

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