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TPS5120EVM-151 PDF预览

TPS5120EVM-151

更新时间： 2024-01-26 07:23:31
品牌 Logo 应用领域
德州仪器 - TI 输出元件控制器
页数 文件大小 规格书
20页 292K
描述
DUAL OUTPUT, TWO PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER

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中文翻译

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TPS5120EVM-151 数据手册

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SLVS278E – AUGUST 2000 – REVISED MARCH 2003  
DBT PACKAGE  
(TOP VIEW)  
D
Independent Dual-Outputs Operate 180°  
Out of Phase  
D
D
D
D
D
Wide Input Voltage Range: 4.5-V – 28-V  
1
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
INV1  
FB1  
SOFTSTART1  
PWM/SKIP  
CT  
LH1  
OUT1_u  
LL1  
OUT1_d  
OUTGND1  
TRIP1  
2
Adjustable Output Voltage Down to 0.9 V  
3
Pin-Selectable PWM/SKIP Mode for High  
Efficiency Under Light Loads  
4
5
Synchronous Buck Operation Allows up to  
95% Efficiency  
6
5V_STBY  
GND  
7
V
CC  
8
Separate Standby Control and Overcurrent  
Protection for Each Channel  
REF  
STBY1  
STBY2  
TRIP2  
9
VREF5  
REG5V_IN  
OUTGND2  
OUT2_d  
LL2  
10  
11  
12  
13  
14  
15  
D
Programmable Short-Circuit Protection  
FLT  
D
Low Supply (1 mA) and Shutdown (1 nA)  
Current  
POWERGOOD  
SOFTSTART2  
FB2  
D
D
D
Power Good Output  
OUT2_u  
LH2  
INV2  
High-Speed Error Amplifiers  
Sequencing Easily Achieved by Selecting  
Softstart Capacitor Values.  
D
D
5-V Linear Regulator Power Internal IC  
Circuitry  
30-Pin TSSOP Packaging  
description  
The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees  
out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP  
pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip  
mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing  
the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time,  
and very low quiescent current, allow power to be conserved and the battery life to be extended under all load  
conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less  
expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify  
the power supply design and reduce the external parts count. Each channel is independent, offering a separate  
controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing  
different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage,  
undervoltage, and programmable short-circuit protection promote system reliability.  
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 2002, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...20

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