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LM20146MHE/NOPB PDF预览

LM20146MHE/NOPB

更新时间： 2024-09-24 11:10:39
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
33页 997K
描述
6A，可调节频率同步降压稳压器 | PWP | 16 | -40 to 125

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LM20146MHE/NOPB 数据手册

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LM20146  
www.ti.com  
SNVS563C –FEBRUARY 2008–REVISED APRIL 2013  
LM20146 6A, Adjustable Frequency Synchronous Buck Regulator  
Check for Samples: LM20146  
1
FEATURES  
DESCRIPTION  
The LM20146 is a full featured adjustable frequency  
synchronous buck regulator capable of delivering up  
to 6A of continuous output current. The current mode  
control loop can be compensated to be stable with  
virtually any type of output capacitor. For most cases,  
compensating the device only requires two external  
components, providing maximum flexibility and ease  
of use. The device is optimized to work over the input  
voltage range of 2.95V to 5.5V making it suitable for  
a wide variety of low voltage systems.  
2
•
•
Input Voltage Range 2.95V to 5.5V  
Accurate Current Limit Minimizes Inductor  
Size  
•
•
97% Peak Efficiency  
Adjustable Switching Frequency (250 kHz to  
750 kHz)  
•
•
•
•
•
•
•
•
16mΩ and 20mΩ Integrated FET Switches  
Starts up into Pre-biased Loads  
Output Voltage Tracking  
The device features internal over voltage protection  
(OVP) and over current protection (OCP) circuits for  
increased system reliability. A precision enable pin  
and integrated UVLO allows the turn-on of the device  
to be tightly controlled and sequenced. Start-up  
inrush currents are limited by both an internally fixed  
and externally adjustable Soft-Start circuit. Fault  
detection and supply sequencing are possible with  
the integrated power good circuit.  
Peak Current Mode Control  
Adjustable Output Voltage Down to 0.8V  
Adjustable Soft-Start with External Capacitor  
Precision Enable Pin with Hysteresis  
Integrated OVP, UVLO, Power Good and  
Thermal Shutdown  
•
16-Pin HTSSOP Exposed Pad Package  
The LM20146 is designed to work well in multi-rail  
power supply architectures. The output voltage of the  
device can be configured to track a higher voltage rail  
using the SS/TRK pin. If the output of the LM20146 is  
pre-biased at startup it will not pull the ouput low.  
APPLICATIONS  
•
•
•
Simple to Design, High Efficiency Point of  
Load Regulation from a 5V or 3.3V Bus  
High Performance DSPs, FPGAs, ASICs and  
Microprocessors  
The frequency of this device can be adjusted from  
250 kHz to 750 kHz by connecting an external  
resistor from the RT pin to ground.  
Broadband, Networking and Optical  
Communications Infrastructure  
The LM20146 is offered in a 16-pin HTSSOP  
package with an exposed pad that can be soldered to  
the PCB, eliminating the need for bulky heatsinks.  
Typical Application Circuit  
L
LM20146  
V
SW  
FB  
PVIN  
OUT  
V
IN  
R
R
FB1  
EN  
C
IN  
R
F
C
OUT  
AVIN  
RT  
FB2  
PGOOD  
VCC  
C
F
R
T
COMP  
C
VCC  
SS/TRK  
AGND  
R
C1  
PGND  
C
SS  
C
C1  
(optional)  
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 © 2008–2013, Texas Instruments Incorporated  
1234567...33

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LM20146MHE/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM20146MH/NOPB TI

类似代替

 6A，可调节频率同步降压稳压器 | PWP | 16 | -40 to 125
LM20146MHX/NOPB TI

类似代替

 6A，可调节频率同步降压稳压器 | PWP | 16 | -40 to 125

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