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RT5761A PDF预览

RT5761A

更新时间: 2024-11-26 17:00:43
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
25页 1607K
描述
6V 1A, ACOT? Buck Converter in Thin UDFN-6L 1.4x1 Package

RT5761A 数据手册

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RT5761A/B  
6V 1A, ACOT® Buck Converter in Thin UDFN-6L 1.4x1 Package  
General Description  
Features  
Input Voltage Range from 2.5V to 6V  
Integrated 120mand 80mFETs  
1A Output Current, up to 95% Efficiency  
100% Duty Cycle for Lowest Dropout  
1% Internal Reference Voltage  
2.2MHz Typical Switching Frequency  
Power Saving Mode for Light Loads (RT5761A)  
Low Quiescent Current: 25A (Typ.)  
Fast Advanced Constant On-Time (ACOT® )  
Control  
The RT5761A/B is  
a
simple, easy-to-use, 1A  
synchronous step-down DC-DC converter with an input  
supply voltage range from 2.5V to 6V. The device  
build-in an accurate 0.6V reference voltage and  
integrates low RDS(ON) power MOSFETs to achieve  
high efficiency in a UDFN-6L 1.4x1 package.  
The RT5761A/B adopts Advanced Constant On-Time  
(ACOT® ) 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 RT5761A  
operate in automatic PSM that maintain high efficiency  
during light load operation. The RT5761B operate in  
Forced PWM that help to meet tight voltage regulation  
accuracy requirements.  
Internal Soft Startup (0.6ms)  
Enable Control Input  
Power Good Indicator  
Both FETs Over-Current Protection  
Negative Over-Current Protection (RT5761B)  
Input Under-Voltage Lockout Protection  
Hiccup-Mode Output Under-Voltage Protection  
Over-Temperature Protection  
The RT5761A/B senses both FETs current for a robust  
over-current  
protection. The  
device features  
cycle-by-cycle current limit protection and prevent the  
device from the catastrophic damage in output short  
circuit, over current or inductor saturation. 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 to provide safe and  
smooth operation in all operating conditions.  
RoHS Compliant and Halogen Free  
Applications  
Mobile Phones and Handheld Devices  
STB, Cable Modem, and xDSL Platforms  
WLAN ASIC Power / Storage (SSD and HDD)  
General Purpose for POL LV Buck Converter  
Simplified Application Circuit  
RT5761A/B  
PG  
V
V
PG  
VIN  
EN  
V
R
IN  
PG  
C
IN  
L
SW  
FB  
OUT  
C
OUT  
Enable  
C
R
R
FF  
FB1  
GND  
FB2  
Copyright © 2020 Richtek Technology Corporation. All rights reserved.  
is a registered trademark of Richtek Technology Corporation.  
DS5761A/B-01 November 2020  
www.richtek.com  
1

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