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RT5751C

更新时间： 2024-11-22 17:00:43
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
36页 1724K
描述
6V 1.5A, ACOT? Buck Converter

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RT5751C 数据手册

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RT5751C/D  
6V 1.5A, ACOT® Buck Converter  
General Description  
Features  
⚫ Input Voltage Range from 2.8V to 6V  
⚫ Integrated 120mand 80mFETs  
⚫ 1.5A Output Current, up to 95% Efficiency  
⚫ 100% Duty Cycle for Lowest Dropout  
⚫ 1% Internal Reference Voltage  
The RT5751C/D is a simple, easy-to-use, 1.5A  
synchronous step-down DC-DC converter with an input  
supply voltage range from 2.8V to 6V. The device  
builds in an accurate 0.6V reference voltage and  
integrates low R  
power MOSFETs to achieve  
DS(ON)  
⚫ 1.5MHz Typical Switching Frequency  
⚫ Power Saving Mode for Light Loads (RT5751C)  
⚫ Low Quiescent Current: 25A (Typ.)  
high efficiency in WDFN-6L 2x2, TSOT-23-5 and  
TSOT-23-6 packages.  
The RT5751C/D adopts Advanced Constant On-Time  
®
⚫ Fast Advanced Constant On-Time (ACOT )  
Control  
®
(ACOT ) control architecture to provide an ultrafast  
transient response with few external components and  
to operate at nearly constant switching frequency over  
the line, load, and output voltage range. The RT5751C  
operates in automatic PSM that maintains high  
efficiency during light load operation. The RT5751D  
operates in Forced PWM that helps to meet tight  
voltage regulation accuracy requirements.  
⚫ Internal Soft-startup (0.6ms)  
⚫ Enable Control Input  
⚫ Power Good Indicator  
⚫ Both FETs Overcurrent Protection  
⚫ Negative Overcurrent Protection (RT5751D)  
⚫ Input Undervoltage Lockout Protection  
⚫ Hiccup-Mode Output Undervoltage Protection  
⚫ Over-Temperature Protection  
The RT5751C/D senses both FETs current for a robust  
overcurrent  
protection.  
The  
device  
features  
⚫ RoHS Compliant and Halogen Free  
cycle-by-cycle current-limit protection and prevents the  
device from the catastrophic damage in output short  
circuit, overcurrent or inductor saturation. A built-in  
soft-start function prevents inrush current during  
start-up. The device also includes input undervoltage  
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  
lockout,  
output  
undervoltage  
protection,  
and  
over-temperature protection to provide safe and  
smooth operation in all operating conditions.  
Simplified Application Circuit  
RT5751C/D  
PG  
V
V
PG  
VIN  
EN  
V
IN  
R
PG  
C
IN  
L
SW  
FB  
OUT  
C
OUT  
Enable  
C
R
R
FF  
FB1  
GND  
FB2  
Copyright © 2022 Richtek Technology Corporation. All rights reserved.  
is a registered trademark of Richtek Technology Corporation.  
DS5751C/D-00 December 2022  
www.richtek.com  
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 		3A, 1.2MHz, 6V Synchronous Step-Down Converter In WDFN-8L 2x2
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