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TPS73047

更新时间： 2024-11-06 04:48:35
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德州仪器 - TI 稳压器射频
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16页 319K
描述
LOW-NOISE, HIGH PSRR, RF 200-mA LOW-DROPOUT LINEAR REGULATORS

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TPS730xx  
www.ti.com  
SBVS054G–NOVEMBER 2004–REVISED DECEMBER 2006  
LOW-NOISE, HIGH PSRR, RF 200-mA  
LOW-DROPOUT LINEAR REGULATORS  
FEATURES  
DESCRIPTION  
•
200-mA RF Low-Dropout Regulator  
With Enable  
The TPS730xx family of low-dropout (LDO)  
low-power linear voltage regulators features high  
power-supply rejection ratio (PSRR), ultralow-noise,  
fast start-up, and excellent line and load transient  
responses a small SOT23 package. NanoStar™  
packaging gives an ultrasmall footprint as well as an  
ultralow profile and package weight, making it ideal  
for portable applications such as handsets and  
PDAs. Each device in the family is stable, with a  
small 2.2µF ceramic capacitor on the output. The  
TPS730xx family uses an advanced, proprietary  
BiCMOS fabrication process to yield low dropout  
voltages (e.g., 120mV at 200mA, TPS73030). Each  
device achieves fast start-up times (approximately  
•
Available in Fixed Voltages from 1.8V to 3.3V  
and Adjustable (1.22V to 5.5V)  
•
•
•
•
•
•
•
High PSRR (68dB at 1kHz)  
Ultralow-Noise (23µVRMS, TPS73018)  
Fast Start-Up Time (50µs)  
Stable With a 2.2µF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Very Low Dropout Voltage (120mV at 200mA)  
5- and 6-Pin SOT23 (DBV), and Wafer Chip  
Scale (YZQ) Packages  
50µs with  
a 0.001µF bypass capacitor) while  
consuming low quiescent current (170µA typical).  
Moreover, when the device is placed in standby  
mode, the supply current is reduced to less than  
1µA. The TPS73018 exhibits approximately 23µVRMS  
of output voltage noise at 2.8V output with a 0.01µF  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Cellular and Cordless Telephones  
Bluetooth®, Wireless LAN  
Handheld Organizers, PDAs  
bypass  
capacitor.  
Applications  
with  
analog  
components that are noise-sensitive, such as  
portable RF electronics, benefit from the high PSRR  
and low-noise features as well as the fast response  
time.  
DBV PACKAGE  
(TOP VIEW)  
TPS73028  
TPS73028  
OUT  
NR  
IN  
1
2
5
RIPPLE REJECTION  
vs  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
GND  
FREQUENCY  
FREQUENCY  
0.30  
100  
90  
3
4
EN  
V
= 3.8 V  
IN  
I
= 200 mA  
OUT  
Fixed Option  
C
C
= 2.2 µF  
OUT  
= 0.1 µF  
0.25  
0.20  
80  
NR  
DBV PACKAGE  
(TOP VIEW)  
70  
IN  
GND  
EN  
OUT  
FB  
1
2
6
5
60  
0.15  
50  
40  
30  
I
= 1 mA  
OUT  
I
= 10 mA  
OUT  
3
4
NR  
0.10  
0.05  
I
= 200 mA  
OUT  
Adjustable Option  
20  
10  
0
V
C
C
= 3.8 V  
= 10 µF  
IN  
YZQ PACKAGE  
(TOP VIEW)  
OUT  
= 0.01 µF  
NR  
0
100  
1 k  
10 k  
100 k  
10  
100  
1 k  
10 k 100 k 1 M 10 M  
IN  
OUT  
C3 C1  
B2  
A3 A1  
Frequency (Hz)  
Frequency (Hz)  
NR  
GND  
EN  
Figure 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.  
NanoStar is a trademark of Texas Instruments.  
Bluetooth is a registered trademark of Bluetooth Sig, Inc.  
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 © 2004–2006, Texas Instruments Incorporated  
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