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RT6341

更新时间： 2024-04-09 19:01:19
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
35页 651K
描述
42VIN, 1.5A, Asynchronous Step-Down Converter with Low Quiescent Current

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RT6341 数据手册

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®
RT6341  
42VIN, 1.5A, Asynchronous Step-Down Converter with Low  
Quiescent Current  
General Description  
Features  
Wide Input Voltage Range  
The RT6341 is a 1.5A, high-efficiency, peak current mode  
control asynchronous step-down converter. The device  
operates with input voltages from 4V to 42V. The device  
can program the output voltage between 0.8V to VIN. The  
low quiescent current design with the integrated low RDS(ON)  
of high-side MOSFET achieves high efficiency over the  
wide load range. The peak current mode control with simple  
external compensation allows the use of small inductors  
and results in fast transient response and good loop  
stability.  
4.5V to 42V  
4V to 42V (Soft-start is finished)  
Wide Output Voltage Range : 0.8V to VIN  
0.8V 1.5% Reference Accuracy  
Peak Current Mode Control  
Integrated 160mΩ High-Side MOSFET  
Low Quiescent Current : 90μA  
Low Shutdown Current : 1.3μA  
Adjustable Switching : 100kHz to 2.5MHz  
Synchronizable Switching : 300kHz to 2.2MHz  
Power Saving Mode (PSM) at Light Load  
Low Dropout at Light Loads with Integrated Boot  
Recharge FET  
The wide switching frequency of 100kHz to 2500kHz allows  
for efficiency and size optimization when selecting the  
output filter components. The ultra-low minimum on-time  
enables constant-frequency operation even at very high  
step-down ratios. For switching noise sensitive  
applications, it can be externally synchronized from  
300kHz to 2200kHz.  
Externally Adjustable Soft-Start by Part Number  
Option  
Power Good Indication by Part Number Option  
Enable Control  
The RT6341 provides complete protection functions such  
as input under-voltage lockout, output under-voltage  
protection, output over-voltage protection, over-current  
protection, and thermal shutdown. Cycle-by-cycle current  
limit provides protection against shorted outputs, and soft-  
start eliminates input current surge during start-up. The  
RT6341 is available in WDFN-10SL 3x3 and SOP-8  
(Exposed pad) packages.  
Adjustable UVLO Voltage and Hysteresis  
Built-In UVLO, UVP, OVP, OCP, OTP  
Applications  
12V and 24V Power Systems  
GPS, Entertainment  
Simplified Application Circuit  
RT6341GQW  
RT6341GSP  
C
C
BOOT  
BOOT  
V
IN  
V
IN  
VIN  
VIN  
BOOT  
SW  
BOOT  
L1  
L1  
C
IN  
V
C
SW  
V
OUT  
IN  
OUT  
D1  
D1  
C
OUT  
C
EN  
OUT  
Enable Signal  
PGOOD  
R
R
R
FB1  
FB1  
EN  
Enable Signal  
FB  
FB  
PGOOD  
R
RT  
R
FB2  
FB2  
RT/SYNC  
COMP  
C
COMP1  
R
COMP  
COMP  
C
COMP1  
R
COMP  
SS/TR  
R
RT  
C
SS  
C
COMP2  
C
COMP2  
RT/SYNC  
PAD  
GND  
GND  
PAD  
Copyright 2020 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS6341-02 April 2020  
www.richtek.com  
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