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TPS7A45XX_09

更新时间： 2024-10-04 07:04:51
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德州仪器 - TI 稳压器
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25页 817K
描述
LOW-NOISE FAST-TRANSIENT-RESPONSE 1.5-A LDO VOLTAGE REGULATORS

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TPS7A45XX_09 数据手册

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TPS7A45xx  
www.ti.com ................................................................................................................................................ SLVS720C –JUNE 2008–REVISED SEPTEMBER 2009  
LOW-NOISE FAST-TRANSIENT-RESPONSE 1.5-A LDO VOLTAGE REGULATORS  
Check for Samples: TPS7A45xx  
1
FEATURES  
DESCRIPTION  
2
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Optimized for Fast Transient Response  
Output Current: 1.5 A  
The TPS7A45xx devices are low-dropout (LDO)  
regulators optimized for fast transient response. The  
device can supply 1.5 A of output current with a  
dropout voltage of 300 mV. Operating quiescent  
current is 1 mA, dropping to less than 1 μA in  
shutdown. Quiescent current is well controlled; it does  
not rise in dropout, as with many other regulators. In  
addition to fast transient response, the TPS7A45xx  
regulators have very low output noise, which makes  
them ideal for sensitive RF supply applications.  
High Output Voltage Accuracy : 1% at 25°C  
Dropout Voltage: 300 mV  
Low Noise: 35 μVRMS (10 Hz to 100 kHz)  
High Ripple Rejection: 68 dB  
1-mA Quiescent Current  
No Protection Diodes Needed  
Controlled Quiescent Current in Dropout  
Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V  
Adjustable Output from 1.21 V to 20 V  
Output voltage range is from 1.21 V to 20 V. The  
TPS7A45xx regulators are stable with output  
capacitors as low as 10 μF. Small ceramic capacitors  
can be used without the necessary addition of ESR,  
as is common with other regulators. Internal  
Less Than 1-μA Quiescent Current in  
Shutdown  
•
•
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Stable with 10-μF Output Capacitor  
Stable with Ceramic Capacitors  
Reverse-Battery Protection  
No Reverse Current  
protection  
circuitry  
includes  
reverse-battery  
protection, current limiting, thermal limiting, and  
reverse-current protection. The devices are available  
in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V,  
and as an adjustable device with a 1.21-V reference  
voltage. The TPS7A45xx regulators are available in  
the 5-pin TO-263 (KTT) and 6-pin TO-223 (DCQ)  
packages.  
Thermal Limiting  
APPLICATIONS  
•
•
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3.3-V to 2.5-V Logic Power Supplies  
Post Regulator for Switching Supplies  
Wireless Infrastructure  
Radio-Frequency Systems  
DCQ PACKAGE  
(TOP VIEW)  
KTT PACKAGE  
(TOP VIEW)  
5
SENSE/ADJ  
SENSE/ADJ  
OUT  
5
4
3
2
1
4
3
2
1
OUT  
GND  
IN  
6
GND  
IN  
SHDN  
SHDN  
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
PowerPAD, PowerFLEX are trademarks 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 © 2008–2009, Texas Instruments Incorporated  
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