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RT6340 PDF预览

RT6340

更新时间： 2024-09-27 15:50:03
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立锜 - RICHTEK /
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35页 620K
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RT6340 技术参数

Status：ActiveVin (min) (V)：4
Vin (max) (V)：42Number of Outputs：1
Vout (min) (V)：0.8Vout (max) (V)：42
Preset Vout (V)：Output Adj. Method：Resistor
Iout (max) (A)：0.5Current Limit (typ) (A)：0.9
Freq (typ) (kHz)：Freq (min) (kHz)：100
Freq (max) (kHz)：2500Ext Sync：Yes
Ron_HS (typ) (mOhm)：170Ron_LS (typ) (mOhm)：
Iq (typ) (mA)：0.09Features：100% Duty Cycle;Adjustable Frequency;Adjustable Soft-Start;Built-in Bootstrap Switch;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;OCP;OTP;OVP;PSM;Power Good;UVP
Package Type：PSOP-8;WDFN3x3-10S

RT6340 数据手册

 浏览型号RT6340的Datasheet PDF文件第2页浏览型号RT6340的Datasheet PDF文件第3页浏览型号RT6340的Datasheet PDF文件第4页浏览型号RT6340的Datasheet PDF文件第5页浏览型号RT6340的Datasheet PDF文件第6页浏览型号RT6340的Datasheet PDF文件第7页 
®
RT6340  
42VIN, 0.5A, Asynchronous Step-Down Converter with Low  
Quiescent Current  
General Description  
Features  
Wide Input Voltage Range  
The RT6340 is a 0.5A, 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 170mΩ 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 RT6340 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  
RT6340 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  
RT6340GQW  
RT6340GSP  
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 2019 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS6340-00 September 2019  
www.richtek.com  
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