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TPS5140 PDF预览

TPS5140

更新时间： 2024-09-12 21:54:23
品牌 Logo 应用领域
德州仪器 - TI 电脑控制器PC
页数 文件大小 规格书
59页 1010K
描述
FOUR-CHANNEL DC/DC CONTROLLER FOR NOTEBOOK PC POWER

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TPS5140 数据手册

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TPS5140  
FOUR-CHANNEL DC/DC CONTROLLER FOR NOTEBOOK PC POWER  
SLVS305A – DECEMBER 2000 – REVISED JANUARY 2001  
PAG PACKAGE  
(TOP VIEW)  
Three Independent Step-Down DC/DC  
Controllers and One 12-V Boost DC/DC  
Converter  
4.5 V – 28 V Input Voltage Range  
Step-Down Controller Output Voltages  
Adjustable Down to 1.2 V  
Synchronous-Buck Operation for High  
Efficiency  
64 63 62 61 60 59 58 57 56 55 54 5352 51 50 49  
1
FB1  
SOFTSTART1  
NC  
48  
LH2  
NC  
2
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
PWM Mode Control  
3
V
CC  
4
INV2  
NC  
Auto PWM/SKIP Mode for High  
Efficiency Under All Load Conditions  
5
FB2  
VREF3.3  
VREF5  
REG5V_IN  
NC  
6
SOFTSTART2  
PWM_SEL  
7
High Speed Error Amplifier  
8
C
t
GND  
Separate Standby Control and Over  
Current Protection for Each Channel  
9
GND_UP  
LL_UP  
IN_12V  
OUT_12V  
NC  
10  
11  
12  
13  
14  
15  
16  
REF  
STBY_VREF3.3  
STBY_VREF5  
STBY1  
Over Voltage and Under Voltage  
Protection  
STBY2  
VCC_SENSE3  
TRIP3  
Programmable Short Circuit Protection  
STBY12V  
STBY3  
Power Good With Programmable Delay  
Time  
NC  
17 18 19 20 21 22 23 24 25 26 27 28 29 3031 32  
5 V and 3.3 V Linear Regulators  
description  
The TPS5140 is a dc/dc controller that incorporates three synchronous-buck controllers and one  
nonsynchronous 12-V boost converter on one chip to power the voltage rails needed by notebook peripheral  
components. On-chiphigh-sideandlow-sidesynchronousrectifierdriversareintegratedtodrivelessexpensive  
N-channelpowerMOSFETs. ThenonsynchronousboostconverterincludestheNchannelpowerMOSFETand  
supports 120 mA for the PCMCIA power supply. The outputs are controlled independently and two of the  
synchronous-buck controllers operate 180 degrees out of phase, with the third lowering the input current ripple  
and allowing a smaller input capacitance to reduce power supply cost. For higher efficiency under all load  
conditions, the TPS5140 automatically adjusts each channel from the PWM mode to the skip mode  
independently. The skip mode enables a lower operating frequency and shortens the pulse width to the low side  
MOSFETs, thereby increasing the efficiency under light load conditions. To further extend battery life, the  
TPS5140 features dead-time control and very low quiescent current. Resistorless current protection and the  
fixed high-side driver voltage simplify the system design and reduce the external parts count.  
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.  
Copyright 2001, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...59

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