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TPS62051

更新时间： 2024-11-17 22:52:55
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
21页 425K
描述
800-mA SYNCHRONOUS STEP-DOWN CONVERTER

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TPS62051 数据手册

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TPS62050, TPS62051  
TPS62052, TPS62054, TPS62056  
www.ti.com  
SLVS432D–SEPTEMBER 2002–REVISED OCTOBER 2003  
800-mA SYNCHRONOUS STEP-DOWN CONVERTER  
FEATURES  
DESCRIPTION  
•
High-Efficiency Synchronous Step-Down  
Converter With up to 95% Efficiency  
12-µA Quiescent Current (Typ)  
2.7-V to 10-V Operating Input Voltage Range  
Adjustable Output Voltage Range From 0.7 V  
to 6 V  
Fixed Output Voltage Options Available in  
1.5 V, 1.8 V, and 3.3 V  
Synchronizable to External Clock Signal up to  
1.2 MHz  
High Efficiency Over a Wide Load Current  
Range in Power-Save Mode  
100% Maximum Duty Cycle for Lowest  
Dropout  
Low Noise Operation in Forced Fixed  
Frequency PWM Operation Mode  
Internal Softstart  
Overtemperature and Overcurrent Protected  
Available in 10-Pin Microsmall Outline  
Package MSOP  
The TPS6205x devices are a family of high-efficiency  
synchronous step-down dc/dc converters ideally suited  
for systems powered from a 1-cell or 2-cell Li-Ion  
battery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline  
battery.  
•
•
•
The TPS62050 is a synchronous PWM converter with  
integrated N-channel and P-channel power MOSFET  
switches. Synchronous rectification increases ef-  
ficiency and reduces external component count. To  
achieve highest efficiency over a wide load current  
•
•
•
•
•
range, the converter enters  
a
power-saving  
pulse-frequency modulation (PFM) mode at light load  
currents. Operating frequency is typically 850 kHz,  
allowing the use of small inductor and capacitor values.  
The device can be synchronized to an external clock  
signal in the range of 600 kHz to 1.2 MHz. For low noise  
operation, the converter can be programmed into  
forced-fixed frequency in PWM mode. In shutdown  
mode, the current consumption is reduced to less than  
2 µA. The TPS6205x is available in the 10-pin (DGS)  
micro-small outline package (MSOP) and operates  
over an free air temperature range of -40°C to 85°C.  
•
•
•
APPLICATIONS  
•
•
•
•
Cellular Phones  
Organizers, PDAs, and Handheld PCs  
Low Power DSP Supply  
Digital Cameras and Hard Disks  
TPS62050  
EFFICIENCY  
vs  
TYPICAL APPLICATION CIRCUIT  
V = 3.3 V to 10 V  
L1 = 10 µH  
I
V = 1.5 V / 800 mA  
O
1
8
9
5
OUTPUT CURRENT  
SW  
FB  
VIN  
EN  
100  
90  
80  
TPS62052  
70  
60  
C = 10 µF  
i
6
7
4
2
PG  
LBI  
C
o
= 22 µF  
50  
40  
SYNC  
GND  
LBO  
30  
20  
10  
0
PGND  
10  
V = 7.2 V,  
I
3
V
= 5 V,  
O
SYNC = L  
0.01  
0.1  
1
10  
100  
1 k  
I
– Output Current – mA  
O
MATHCAD is a trademark of Mathsoft Incorporated.  
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.  
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 in-  
cludetestingofallparameters.  
Copyright © 2002–2003, Texas Instruments Incorporated  
1234567...21

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TPS62051 替代型号

型号 品牌 替代类型 描述 数据表
TPS62150A TI

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