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TPS79516

更新时间： 2024-11-14 22:22:23
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德州仪器 - TI 稳压器射频
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12页 344K
描述
ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA LOW-DROPOUT LINEAR REGULATORS

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TPS79516 数据手册

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TPS79501, TPS79516  
TPS79518, TPS79525  
TPS79530, TPS79533  
www.ti.com  
SLVS350B–OCTOBER 2002–REVISED OCTOBER 2004  
ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA  
LOW-DROPOUT LINEAR REGULATORS  
FEATURES  
DESCRIPTION  
•
500-mA Low-Dropout Regulator With Enable  
The TPS795xx 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 in a small outline, SOT223-6, package.  
Each device in the family is stable with a small 1-µF  
ceramic capacitor on the output. The family uses an  
advanced, proprietary BiCMOS fabrication process to  
yield extremely low dropout voltages (for example,  
110 mV at 500 mA). Each device achieves fast  
start-up times (approximately 50 µs with a 0.001-µF  
bypass capacitor) while consuming very low quiesc-  
ent current (265 µA typical). Moreover, when the  
device is placed in standby mode, the supply current  
is reduced to less than 1 µA. The TPS79530 exhibits  
approximately 33 µVRMS of output voltage noise at  
3.0 V output with a 0.1-µF bypass capacitor. Appli-  
cations with analog components that are noise sensi-  
tive, such as portable RF electronics, benefit from the  
high PSRR and low noise features, as well as the fast  
response time.  
•
Available in 1.6-V, 1.8-V, 2.5-V, 3-V, 3.3-V, and  
Adjustable (1.2-V to 5.5-V)  
•
•
•
•
•
•
High PSRR (50 dB at 10 kHz)  
Ultralow Noise (33 µVRMS, TPS79530)  
Fast Start-Up Time (50 µs)  
Stable With a 1-µF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Very Low Dropout Voltage (110 mV at Full  
Load, TPS79530)  
•
6-Pin SOT223-6 Package  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Bluetooth™, Wireless LAN  
Cellular and Cordless Telephones  
Handheld Organizers, PDAs  
TPS79530  
TPS79530  
RIPPLE REJECTION  
vs  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
FREQUENCY  
FREQUENCY  
80  
0.5  
V
C
C
= 4 V  
= 10 µF  
IN  
V
= 5.5 V  
IN  
DCQ PACKAGE  
SOT223-6  
(TOP VIEW)  
70  
OUT  
C
C
= 2.2 µF  
OUT  
= 0.1 µF  
= 0.01 µF  
NR  
I
= 1 mA  
0.4  
0.3  
OUT  
NR  
60  
1
2
3
4
5
50  
40  
30  
EN  
IN  
GND  
OUT  
NR/FB  
I
= 1 mA  
OUT  
6
GND  
I
= 500 mA  
OUT  
0.2  
20  
10  
0
I
= 0.5 A  
OUT  
0.1  
0
1
10  
100  
1 k 10 k 100 k 1 M 10 M  
100  
1 k  
Frequency (Hz)  
10 k  
100 k  
Frequency (Hz)  
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.  
Bluetooth is a 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 © 2002–2004, Texas Instruments Incorporated  
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