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TPS71257DRCTG4

更新时间： 2024-11-06 00:48:51
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德州仪器 - TI /
页数 文件大小 规格书
21页 639K
描述
Dual 250 mA Output, UltraLow Noise, High PSRR, Low-Dropout Linear Regulator

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TPS71257DRCTG4 数据手册

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TPS71202, TPS71219  
TPS71229, TPS71247  
A ctu al S ize  
(3 m m x 3 m m)  
TPS71256, TPS71257  
www.ti.com  
SBVS049D –MAY 2004–REVISED AUGUST 2010  
Dual 250 mA Output, UltraLow Noise, High PSRR,  
Low-Dropout Linear Regulator  
Check for Samples: TPS71202, TPS71219, TPS71229, TPS71247, TPS71256, TPS71257  
1
FEATURES  
DESCRIPTION  
•
Dual 250 mA High-Performance RF LDOs  
The TPS712xx family of low-dropout (LDO) voltage  
regulators is tailored to noise-sensitive and RF  
applications. These products feature dual 250 mA  
LDOs with ultralow noise, high power-supply rejection  
ratio (PSRR), and fast transient and start-up  
response. Each regulator output is stable with  
low-cost 2.2 mF ceramic output capacitors and  
features very low dropout voltages (125 mV typical at  
250 mA). Each regulator achieves fast start-up times  
(approximately 60 ms with a 0.001 mF bypass  
capacitor) while consuming very low quiescent  
current (300 mA typical with both outputs enabled).  
When the device is placed in standby mode, the  
supply current is reduced to less than 0.3 mA typical.  
Each regulator exhibits approximately 32 mVrms of  
output voltage noise with VOUT = 2.8 V and a 0.01 mF  
noise reduction (NR) capacitor. Applications with  
analog components that are noise-sensitive, such as  
portable RF electronics, will benefit from high PSRR,  
low noise, and fast line and load transient features.  
The TPS712 family is offered in a thin 3mm x 3mm  
SON package and is fully specified from -40°C to  
+125°C (TJ).  
•
Available in Fixed and Adjustable  
Voltage Options (1.2 V to 5.5 V)  
•
•
•
•
•
•
•
•
High PSRR: 65 dB at 10 kHz  
UltraLow Noise: 32 mVrms  
Fast Start-Up Time: 60 ms  
Stable with 2.2 mF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Very Low Dropout Voltage: 125 mV at 250 mA  
Independent Enable Pins  
Thermal Shutdown and Independent Current  
Limit  
•
Available in Thermally-Enhanced SON  
Package: 3mm x 3mm x 1mm  
APPLICATIONS  
•
•
•
•
•
Cellular and Cordless Phones  
Wireless PDA/Handheld Products  
PCMCIA/Wireless LAN Applications  
Digital Camera/Camcorder/Internet Audio  
DSP/FPGA/ASIC/Controllers and Processors  
PSRR (RIPPLE REJECTION) vs FREQUENCY  
80  
70  
60  
50  
40  
30  
20  
10  
0
IOUT = 250 mA  
DRC PACKAGE  
3mm x 3mm SON  
(TOP VIEW)  
IN  
NC  
1
2
3
4
5
10 EN1  
IOUT = 1 mA  
9
8
7
6
FB1/NC  
OUT1  
OUT2  
GND  
EN2  
FB2/NC  
NR  
VOUT = 2.8 V  
µ
COUT = 2.2  
CNR = 0.01  
F
F
µ
10  
100  
1k  
10k  
100k  
1M  
10M  
Frequency (Hz)  
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 © 2004–2010, Texas Instruments Incorporated  
1234567...21

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