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TPS795XX

更新时间： 2024-11-15 06:02:19
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德州仪器 - TI 稳压器射频
页数 文件大小 规格书
23页 1064K
描述
ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 500-mA LOW-DROPOUT LINEAR REGULATORS

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TPS795XX 数据手册

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TPS795xx  
www.ti.com  
SLVS350G–OCTOBER 2002–REVISED JULY 2006  
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 small outline, SOT223-6 and 3 x 3 SON  
packages. 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  
•
Available in Fixed and Adjustable (1.2-V to  
5.5-V) Versions  
•
•
•
•
•
•
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)  
µs with  
a
0.001-µF bypass capacitor) while  
consuming very low quiescent 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. 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 from the fast  
response time.  
•
6-Pin SOT223 and 3 × 3 SON Packages  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Bluetooth®, Wireless LAN  
Cellular and Cordless Telephones  
Handheld Organizers, PDAs  
TPS79530  
RIPPLE REJECTION  
vs  
TPS79530  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
DRB PACKAGE  
3mm x 3mm SON  
(TOP VIEW)  
FREQUENCY  
FREQUENCY  
80  
70  
0.5  
V
= 4 V  
IN  
V
= 5.5 V  
IN  
C
C
= 10 mF  
IN  
IN  
1
2
3
4
8
7
6
5
EN  
OUT  
C
OUT  
= 2.2 mF  
= 0.01 mF  
NR  
I
= 1 mA  
0.4  
0.3  
C
NR  
= 0.1 mF  
OUT  
NC  
60  
50  
40  
30  
OUT  
OUT  
GND  
NR/FB  
DCQ PACKAGE  
SOT223-6  
(TOP VIEW)  
I
= 1 mA  
OUT  
I
= 500 mA  
OUT  
0.2  
1
2
EN  
IN  
20  
10  
0
6
I
= 0.5 A  
OUT  
3
4
5
GND  
OUT  
0.1  
0
GND  
NR/FB  
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 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 © 2002–2006, Texas Instruments Incorporated  
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