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TPS2500

更新时间： 2024-11-19 05:52:23
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德州仪器 - TI 转换器开关电源开关升压转换器
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42页 1705K
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INTEGRATED USB POWER SWITCH WITH BOOST CONVERTER

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TPS2500 数据手册

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TPS2500, TPS2501  
www.ti.com ................................................................................................................................................ SLVS886A–OCTOBER 2008–REVISED AUGUST 2009  
INTEGRATED USB POWER SWITCH WITH BOOST CONVERTER  
1
FEATURES  
APPLICATIONS  
•
•
Portable Applications Using Single Li+ Cell  
USB Hosts Without Native 5-V Supplies  
23  
•
Integrated Synchronous Boost Converter and  
USB Current-Limit Power Switch  
•
Light-Load, High-Efficiency Eco-mode™  
Control Scheme (TPS2500) or Constant  
Frequency (TPS2501)  
DESCRIPTION  
The TPS2500 and TPS2501 provide an integrated  
solution to meet USB 5-V power requirements from a  
1.8-V to 5.25-V input supply. The features include a  
Hi-Speed USB compliant power output, output switch  
enable, current limit, and overcurrent fault reporting.  
•
•
1.8-V to 5.25-V Input Voltage (2.2-V Minimum  
Start-Up Voltage)  
Adjustable USB Current Limit  
–
130 mA to 1400 mA (Typical)  
The 1.8-V to 5.25-V input can be supplied by sources  
including dc/dc regulated supplies (e.g., 3.3 V), or  
batteries such as single-cell Li+ or three-cell NiCd,  
NiMH, or alkaline.  
•
•
•
•
•
Accurate 20% Current Limit at 1.4-A Setting  
Powers up to Two Standard USB Ports  
Auxiliary 5.1-V Output  
Minimal External Components Required  
The USB power-switch current limit is programmable  
via an external resistor from as low as 130 mA to as  
high as 1400 mA (typical). Two standard USB ports  
can be supported from a single TPS2500 or TPS2501  
at the 1400-mA setting.  
Fast Overcurrent-Response Time – 5 µs  
Typical  
•
•
Small 3-mm × 3-mm × 0.9-mm SON-10 Package  
15-kV / 8-kV System-Level ESD Capable  
Additionally, the boost converter output is available as  
an auxiliary 5.1-V output to power additional loads.  
The total current supplied by the USB output and the  
auxiliary cannot exceed 1148 mA at VIN = 3 V.  
TYPICAL APPLICATION CIRCUIT  
2.2 mH  
SW  
IN  
BOOST EFFICIENCY  
vs  
5 V Auxiliary Load  
Power, 100 mA(2)  
1.8-V to  
5.25-V Input  
AUX  
EN  
10 mF  
22 mF  
ENUSB  
FAULT  
OUTPUT AUXILIARY CURRENT  
RFAULT  
0.97  
USB FAULT Flag  
0.95  
0.93  
5 V USB Power  
5 V USB  
Port #1  
500 mA  
USB  
ILIM  
Data  
V
IN  
= 4.5 V  
GND  
RILIM  
PGND  
0.91  
0.89  
0.87  
0.85  
0.83  
0.81  
0.79  
0.77  
120 mF(1)  
POWER PAD  
V
IN  
= 3.3 V  
5 V USB  
Port #2  
500 mA  
Data  
S0380-02  
(1) Requirement for USB applications only;  
downstream facing ports should be  
bypassed with 120 µF minimum per hub.  
V
IN  
= 1.8 V  
(2) Additional current can be supplied from  
AUX if <1 A is required for USB ports;  
total current should not exceed 1.1 A at  
VIN = 3 V.  
0
300  
600  
900  
1200  
1500  
I (AUX) − Output Auxiliary Current − mA  
O
G001  
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
3
Eco-mode, PowerPAD are trademarks of Texas Instruments.  
All other trademarks are the property of their respective owners.  
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 © 2008–2009, Texas Instruments Incorporated  
 
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