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TMK325BJ106MM

更新时间： 2024-11-21 05:52:27
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
33页 910K
描述
Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA LDOs for Notebook System Power

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TMK325BJ106MM 数据手册

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TPS51123  
www.ti.com ........................................................................................................................................................................................... SLUS890–DECEMBER 2008  
Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA  
LDOs for Notebook System Power  
1
FEATURES  
APPLICATIONS  
•
•
•
Notebook Computers  
I/O Supplies  
System Power Supplies  
2
•
Wide-Input Voltage Range: 5.5 V to 28 V  
Output Voltage Range: 2 V to 5.5 V  
Built-in 100-mA 5-V/3.3-V LDO with Switches  
Built-in 1% 2-V Reference Output  
•
•
•
•
DESCRIPTION  
With/Without Out-of-Audio™ Mode Selectable  
Light-Load and PWM only Operation  
The TPS51123 is a cost effective, dual-synchronous  
buck controller targeted for notebook system power  
supply solutions. It provides 5-V and 3.3-V LDOs and  
requires few external components. The TPS51123  
supports high efficiency, fast transient responses and  
•
•
Internal 1.6-ms Voltage Servo Softstart  
Adaptive On-Time Control Architecture with  
Four Selectable Frequency Setting  
provides  
a
combined  
power-good  
signal.  
•
•
•
•
•
•
4500 ppm/°C RDS(on) Current Sensing  
Built-In Output Discharge  
Power Good Output  
Out-of-Audio™ mode light-load operation enables low  
acoustic noise at much higher efficiency than  
conventional forced PWM operation. Adaptive  
on-time D-CAP™ control provides convenient and  
efficient operation. The part operates with supply  
input voltages ranging from 5.5 V to 28 V and  
supports output voltages from 2 V to 5.5 V. The  
TPS51123 is available in a 24-pin QFN package and  
is specified from -40°C to 85°C ambient temperature  
range.  
Built-in OVP/UVP/OCP  
Thermal Shutdown (Non-latch)  
24-Pin QFN (RGE) Package  
13 kW  
20 kW  
20 kW  
220 nF  
30 kW  
VIN  
VIN  
130 kW  
130 kW  
VIN  
10 mF x 2  
5.5 V  
to  
28 V  
10 mF x 2  
6
5
4
3
2
1
7
8
9
VO2  
VO1 24  
100 kW  
10 mF  
VREG3  
VBST2  
PGOOD 23  
VBST1 22  
DRVH1 21  
LL1 20  
VREG5  
0.1 mF  
0.1 mF  
TPS51123RGE  
(QFN-24)  
3.3 mF  
3.3 mF  
5.1 W  
5.1 W  
VO2  
VO1  
5 V  
10 DRVH2  
11 LL2  
3.3 V  
PowerPAD  
330 mF  
330 mF  
12 DRVL2  
DRVL1 19  
13 14 15 16 17 18  
EN0  
ENC  
VREG5  
33 mF  
VIN  
UDG-08167  
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.  
2
Out-of-Audio, D-CAP are trademarks of Texas Instruments.  
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, Texas Instruments Incorporated  
1234567...33

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