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TPS730XX

更新时间： 2024-11-23 04:48:35
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13页 333K
描述
LOW-NOISE, HIGH PSRR, RF 200-mA LOW-DROPOUT LINEAR REGULATORS

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TPS730xx  
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www.ti.com  
SBVS054H–NOVEMBER 2004–REVISED OCTOBER 2007  
LOW-NOISE, HIGH PSRR, RF 200-mA  
LOW-DROPOUT LINEAR REGULATORS  
1
FEATURES  
DESCRIPTION  
234  
•
200-mA RF Low-Dropout Regulator  
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  
With Enable  
•
Available in Fixed Voltages from 1.8V to 3.3V  
and Adjustable (1.22V to 5.5V)  
•
•
•
•
•
•
•
High PSRR (68dB at 100Hz)  
Ultralow-Noise (33μVRMS, 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  
fast start-up times (approximately 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 33μVRMS of output voltage  
noise at 1.8V output with a 0.01μF 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.  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Cellular and Cordless Telephones  
Bluetooth®, Wireless LAN  
Handheld Organizers, PDAs  
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.  
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
4
NanoStar is a trademark of Texas Instruments.  
Bluetooth is a registered trademark of Bluetooth Sig, Inc.  
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 © 2004–2007, Texas Instruments Incorporated  
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