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TPS62125

更新时间： 2024-11-04 11:44:39
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德州仪器 - TI 转换器
页数 文件大小 规格书
37页 7532K
描述
3V-17V, 300mA Step Down Converter With Adjustable Enable Threshold And Hysteresis

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TPS62125 数据手册

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TPS62125  
www.ti.com  
SLVSAQ5A –MARCH 2012–REVISED APRIL 2012  
3V-17V, 300mA Step Down Converter With Adjustable Enable Threshold And Hysteresis  
Check for Samples: TPS62125  
1
FEATURES  
DESCRIPTION  
The TPS62125 is a high efficiency synchronous step  
down converter optimized for low and ultra low power  
applications providing up to 300mA output current.  
The wide input voltage range of 3V to 17V supports  
four cell alkaline and 1 to 4 cell Li-Ion batteries in  
series configuration as well as 9V to 15V powered  
applications. The device includes a precise low power  
enable comparator which can be used as an input  
supply voltage supervisor (SVS) to address system  
specific power up and down requirements. The  
enable comparator consumes only 6µA quiescent  
current and features an accurate threshold of 1.2V  
typical as well as an adjustable hysteresis. With this  
feature, the converter can generate a power supply  
rail by extracting energy from a storage capacitor fed  
•
•
Wide Input Voltage Range 3V to 17V  
Input SVS (Supply Voltage Supervisor) with  
Adjustable Threshold / Hysteresis Consuming  
typ. 6µA Quiescent Current  
•
•
•
•
•
•
•
•
Wide Output Voltage Range 1.2V to 10V  
Typ. 13 µA Quiescent Current  
350nA typ. Shutdown Current  
Seamless Power Save Mode Transition  
DCS-ControlTM Scheme  
Low Output Ripple Voltage  
Up to 1MHz Switching Frequency  
Highest Efficiency over Wide VIN and VOUT  
Range  
from high impedance sources such as solar panels or  
TM  
current loops. With its DCS - Control  
scheme the  
•
•
•
•
•
Pin to Pin Compatible with TPS62160/70  
100% Duty Cycle Mode  
converter provides power save mode operation to  
maintain highest efficiency over the entire load  
current range. At light loads the converter operates in  
PFM mode (pulse frequency modulation) and  
transitions seamlessly and automatically in PWM  
(pulse width modulation) mode at higher load  
currents. The DCS - ControlTM scheme is optimized  
for low output ripple voltage in PFM mode in order to  
reduce output noise to a minimum and features  
excellent AC load regulation. An open drain power  
good output indicates once the output voltage is in  
regulation.  
Power Good Open Drain Output  
Output Discharge Function  
Small 2x2mm2 SON 8 pin Package  
APPLICATIONS  
•
•
Embedded processing  
4 cell alkaline, 1-4 cell Li-Ion battery powered  
applications  
•
•
•
9V - 15V standby power supply  
Energy harvesting  
Inverter (negative VOUT)  
95  
10mA  
100mA  
90  
85  
80  
75  
70  
65  
60  
55  
50  
VOUT = 3.3V  
up to 300mA  
TPS62125  
250mA  
VIN = 4V to 17V  
L 15µH  
SW  
VIN  
1.0mA  
R1  
1.8M  
COUT  
10µF  
VOS  
FB  
EN  
CIN  
10µF  
R2  
0.25mA  
576k  
EN_hys  
GND  
VOUT = 3.3V  
L = 15mH VLF302515  
COUT = 10mF  
Rpullup  
0.1mA  
PG  
PWR GOOD  
4
5
6
7
8
9
10 11 12 13 14 15 16 17  
Input Voltage VIN(V)  
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.  
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 © 2012, Texas Instruments Incorporated  
1234567...37

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TPS62125 替代型号

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