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CRCW12061102F

更新时间： 2024-11-16 12:33:11
品牌 Logo 应用领域
德州仪器 - TI 稳压器控制器
页数 文件大小 规格书
31页 1294K
描述
LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller

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CRCW12061102F 数据手册

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LM2727, LM2737  
www.ti.com  
SNVS205D –AUGUST 2002–REVISED MARCH 2013  
LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output  
Voltages  
Check for Samples: LM2727, LM2737  
1
FEATURES  
DESCRIPTION  
The LM2727 and LM2737 are high-speed,  
synchronous, switching regulator controllers. They  
are intended to control currents of 0.7A to 20A with  
up to 95% conversion efficiencies. The LM2727  
employs output over-voltage and under-voltage latch-  
off. For applications where latch-off is not desired, the  
LM2737 can be used. Power up and down  
sequencing is achieved with the power-good flag,  
adjustable soft-start and output enable features. The  
LM2737 and LM2737 operate from a low-current 5V  
bias and can convert from a 2.2V to 16V power rail.  
Both parts utilize a fixed-frequency, voltage-mode,  
PWM control architecture and the switching  
frequency is adjustable from 50kHz to 2MHz by  
adjusting the value of an external resistor. Current  
limit is achieved by monitoring the voltage drop  
across the on-resistance of the low-side MOSFET,  
which enhances low duty-cycle operation. The wide  
range of operating frequencies gives the power  
supply designer the flexibility to fine-tune component  
size, cost, noise and efficiency. The adaptive, non-  
overlapping MOSFET gate-drivers and high-side  
bootstrap structure helps to further maximize  
efficiency. The high-side power FET drain voltage can  
be from 2.2V to 16V and the output voltage is  
adjustable down to 0.6V.  
2
•
Input Power from 2.2V to 16V  
•
•
Output Voltage Adjustable Down to 0.6V  
Power Good flag, Adjustable Soft-Start and  
Output Enable for Easy Power Sequencing  
•
•
Output Over-Voltage and Under-Voltage Latch-  
Off (LM2727)  
Output Over-Voltage and Under-Voltage Flag  
(LM2737)  
•
•
•
•
•
Reference Accuracy: 1.5% (0°C - 125°C)  
Current Limit Without Sense Resistor  
Soft Start  
Switching Frequency from 50 kHz to 2 MHz  
TSSOP-14 Package  
APPLICATIONS  
•
•
•
•
•
Cable Modems  
Set-Top Boxes/ Home Gateways  
DDR Core Power  
High-Efficiency Distributed Power  
Local Regulation of Core Power  
Typical Application  
+5V  
VIN = 3.3V  
CBOOT  
D1  
0.1m  
RIN  
CIN1,2  
Si4884DY  
Q1  
Q2  
10W  
10mF  
6.3V  
VCC  
HG  
1.5 mH  
6.1 A, 9.6 mW  
CIN  
2.2mF  
SD  
BOOT  
RCS  
VO = 1.2V@5A  
ISEN  
PWGD  
FREQ  
SS  
RFADJ  
L1  
Si4884DY  
2.2k  
LM27x7  
LG  
PGND  
PGND  
FB  
CO1,2  
+
63.4k  
CSS  
12n  
RFB2  
10k  
2200mF  
6.3V, 2.8A  
SGND  
EAO  
RFB1  
CC1  
10k  
RC1  
392k  
CC2  
180p  
2.2p  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2002–2013, Texas Instruments Incorporated  
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CRCW12061102F100R20 VISHAY

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 		Fixed Resistor, Metal Glaze/thick Film, 0.25W, 11000ohm, 200V, 1% +/-Tol, -100,100ppm/Cel,
CRCW12061102F100RT1 VISHAY

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 		Fixed Resistor, Metal Glaze/thick Film, 0.25W, 11000ohm, 200V, 1% +/-Tol, 100ppm/Cel, Surf
CRCW12061102F100RT5 VISHAY

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 		Fixed Resistor, Metal Glaze/thick Film, 0.25W, 11000ohm, 200V, 1% +/-Tol, 100ppm/Cel, Surf
CRCW12061102F100RT5-PB VISHAY

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 		RESISTOR, METAL GLAZE/THICK FILM, 0.25W, 1%, 100ppm, 11000ohm, SURFACE MOUNT, 1206, CHIP
CRCW12061102F50RT5 VISHAY

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 		Fixed Resistor, Metal Glaze/thick Film, 0.125W, 11000ohm, 200V, 1% +/-Tol, 50ppm/Cel, Surf
CRCW12061102FB02 VISHAY

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 		RESISTOR, METAL GLAZE/THICK FILM, 0.125W, 1%, 100ppm, 11000ohm, SURFACE MOUNT, 1206, CHIP
CRCW12061102FB02-E3 VISHAY

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 		RESISTOR, METAL GLAZE/THICK FILM, 0.125W, 1%, 100ppm, 11000ohm, SURFACE MOUNT, 1206, CHIP
CRCW12061102FHTA VISHAY

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 		Fixed Resistor, Metal Glaze/thick Film, 0.25W, 11000ohm, 200V, 1% +/-Tol, 50ppm/Cel, Surfa
CRCW12061102FRT1 VISHAY

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 		RESISTOR, METAL GLAZE/THICK FILM, 0.125W, 1%, 100ppm, 11000ohm, SURFACE MOUNT, 1206, CHIP
CRCW12061102FRT1-PB VISHAY

获取价格

 		RESISTOR, METAL GLAZE/THICK FILM, 0.125W, 1%, 100ppm, 11000ohm, SURFACE MOUNT, 1206, CHIP

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