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TPS61025 PDF预览

TPS61025

更新时间： 2024-11-09 22:03:31
品牌 Logo 应用领域
德州仪器 - TI 转换器开关升压转换器
页数 文件大小 规格书
22页 628K
描述
96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH

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TPS61025 数据手册

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TPS61020, TPS61024  
(3,25 mm x 3,25 mm)  
TPS61025, TPS61027  
www.ti.com  
SLVS451A–SEPTEMBER 2003–REVISED APRIL 2004  
96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH  
FEATURES  
DESCRIPTION  
•
96% Efficient Synchronous Boost Converter  
– 200-mA Output Current From 0.9-V Input  
– 500-mA Output Current From 1.8-V Input  
The TPS6102x devices provide a power supply  
solution for products powered by either a one-cell,  
two-cell, or three-cell alkaline, NiCd or NiMH, or  
one-cell Li-Ion or Li-polymer battery. Output currents  
can go as high as 200 mA while using a single-cell  
alkaline, and discharge it down to 0.9 V. It can also  
be used for generating 5 V at 500 mA from a 3.3-V  
rail or a Li-Ion battery. The boost converter is based  
on a fixed frequency, pulse-width-modulation (PWM)  
controller using a synchronous rectifier to obtain  
maximum efficiency. At low load currents the con-  
verter enters the Power Save mode to maintain a  
high efficiency over a wide load current range. The  
Power Save mode can be disabled, forcing the  
converter to operate at a fixed switching frequency.  
The maximum peak current in the boost switch is  
limited to a value of 1500 mA.  
•
Output Voltage Remains Regulated When In-  
put Voltage Exceeds Nominal Output Voltage  
•
•
•
Device Quiescent Current: 25-µA (Typ)  
Input Voltage Range: 0.9-V to 6.5-V  
Fixed and Adjustable Output Voltage Options  
Up to 5.5-V  
•
Power Save Mode for Improved Efficiency at  
Low Output Power  
•
•
Low Battery Comparator  
Low EMI-Converter (Integrated Antiringing  
Switch)  
•
•
•
Load Disconnect During Shutdown  
Over-Temperature Protection  
The TPS6102x devices keep the output voltage  
regulated even when the input voltage exceeds the  
nominal output voltage. The output voltage can be  
programmed by an external resistor divider, or is  
fixed internally on the chip. The converter can be  
disabled to minimize battery drain. During shutdown,  
the load is completely disconnected from the battery.  
A low-EMI mode is implemented to reduce ringing  
and, in effect, lower radiated electromagnetic energy  
when the converter enters the discontinuous conduc-  
tion mode. The device is packaged in a 10-pin QFN  
PowerPAD™package measuring 3 mm x 3 mm  
(DRC).  
Small 3 mm x 3 mm QFN-10 Package  
APPLICATIONS  
•
All One-Cell, Two-Cell and Three-Cell Alkaline,  
NiCd or NiMH or Single-Cell Li Battery  
Powered Products  
Portable Audio Players  
PDAs  
Cellular Phones  
Personal Medical Products  
Camera White LED Flash Light  
•
•
•
•
•
L1  
V
O
VOUT  
FB  
SW  
6.8 µH  
3.3 V Up To  
200 mA  
C2  
2.2 µF  
C3  
47 µF  
VBAT  
R3  
R4  
R1  
R2  
C1  
10 µF  
EN  
0.9-V To  
6.5-V Input  
R5  
LBI  
PS  
LBO  
Low Battery  
Output  
GND  
PGND  
TPS61020  
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.  
PowerPAD is a trademark 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 © 2003–2004, Texas Instruments Incorporated  
1234567...22

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TPS61025 替代型号

型号 品牌 替代类型 描述 数据表
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