Datasheet > RTQ1741A

RTQ1741A

更新时间： 2024-09-28 20:09:39

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
16页	171K
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技术参数
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RTQ1741A 技术参数

Status：	Active	Vin (min) (V)：	1.8
Vin (max) (V)：	5.5	Vout (min) (V)：	1.8
Vout (max) (V)：	5.5	Iout (max) (A)：	3
Current Limit (typ) (A)：	4.5	Freq (typ) (kHz)：	2400
Freq (min) (kHz)：	2000	Freq (max) (kHz)：	2800
Ron_HS (typ) (mOhm)：	50	Ron_LS (typ) (mOhm)：	50
Iq (typ) (mA)：	0.02	Features：	Enable Input;OCP;OVP;Power Good;SCP;UVP
Package Type：	WDFN4x3-14A

RTQ1741A 数据手册

RTQ1741A

High Efficiency Single Inductor Buck-Boost Converter

General Description

Features

^Operates from a Single Li-ion Cell : 1.8V to 5.5V

^Adjustable Output Voltage : 1.8V to 5.5V

^3A Maximum Load Capability for V_IN> 3.6V,

V_OUT= 3.3V

The RTQ1741A is a high efficiency single inductor Buck-

Boost Converter which can operate with wide input voltage

such as battery which is higher or lower than the output

voltage and it can supply the load current up to 4A. The

maximum peak current in the switches is limited to a

typical value of 4.5A.

^Power Save Mode (PSM) for Improving Low Output

Power Efficiency

^Fixed Frequency Operation at 2.4MHz and

Synchronization Possible from 2.2MHz to 2.6MHz

^Up to 96% Efficiency

The RTQ1741Afeedback loop is internally compensated

for both Buck and Boost operation and it provides seamless

transition between Buck and Boost modes and optimal

transient response. The RTQ1741A operates at 2.4MHz

typical switching frequency in full synchronous operation.

^Input Current Limit

^Internal Compensation

^RoHS Compliant and Halogen Free

The RTQ1741A operates in Pulse Skipped Modulation

(PSM) mode for increasing efficiency during low power

RF transmission modes. The Power Save Mode can be

disabled, forcing the RTQ1741A to operate at a fixed

switching frequency operation at 2.4MHz. The RTQ1741A

can also be synchronized with external frequency from

2.2MHz to 2.6MHz. The output voltage is programmable

using an external resistor divider.

Pin Configuration

(TOP VIEW)

PGOOD

PS/SYNC

VIN

VINA

GND

VOUT

LX2

PGND

LX1

Applications

 Cellular Phones

 Portable HardDiskDrives

 PDAs

WDFN-14AL 4x3

Simplified Application Circuit

LX1

LX2

RTQ1741A

VOUT

OUT

VIN

VINA

Power Good

Output

Enable

PGOOD

PS/SYNC

GND

PGND

is a registered trademark of Richtek Technology Corporation.

DSQ1741A-00 October 2019

www.richtek.com

12 3 4 5 6 7...16

中文翻译

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