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TPS79630

更新时间： 2024-11-14 22:52:47
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德州仪器 - TI 稳压器射频
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18页 548K
描述
ULTRALOW-NOISE, HIGH PSRR, FAST RF 1-A LOW-DROPOUT LINEAR REGULATORS

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TPS79630 数据手册

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TPS79601, TPS79618, TPS79625  
TPS79628, TPS79630, TPS79633  
www.ti.com  
SLVS351D–SEPTEMBER 2002–REVISED OCTOBER 2004  
ULTRALOW-NOISE, HIGH PSRR, FAST RF 1-A  
LOW-DROPOUT LINEAR REGULATORS  
FEATURES  
DESCRIPTION  
•
1-A Low-Dropout Regulator With Enable  
The TPS796xx 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, 3 x 3 SON, SOT223-6,  
and 5-pin DDPAK packages. Each device in the  
family is stable with a small 1-µF ceramic capacitor  
on the output. The family uses an advanced, pro-  
prietary BiCMOS fabrication process to yield ex-  
tremely low dropout voltages (e.g., 250 mV at 1 A).  
•
Available in 1.8-V, 2.5-V, 2.8-V, 3-V, 3.3-V, and  
Adjustable (1.2-V to 5.5-V)  
•
•
•
•
•
•
High PSRR (53 dB at 10 kHz)  
Ultralow-Noise (40 µVRMS, TPS79630)  
Fast Start-Up Time (50 µs)  
Stable With a 1-µF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Each device achieves  
fast  
start-up times  
Very Low Dropout Voltage (250 mV at Full  
Load, TPS79630)  
(approximately 50 µs with a 0.001-µF bypass capaci-  
tor) 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 TPS79630 exhibits approximately  
40 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, low  
noise features, and the fast response time.  
•
3 x 3 SON, 6-Pin SOT223-6, and  
5-Pin DDPAK Packages  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Bluetooth™, Wireless LAN  
Cellular and Cordless Telephones  
Handheld Organizers, PDAs  
DCQ PACKAGE  
SOT223-6  
(TOP VIEW)  
DRB PACKAGE  
3 x 3 SON  
(TOP VIEW)  
TPS79630  
RIPPLE REJECTION  
vs  
TPS79630  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
FREQUENCY  
0.7  
IN  
IN  
1
2
3
4
FREQUENCY  
8
7
6
5
EN  
1
2
3
4
5
EN  
IN  
GND  
OUT  
NR/FB  
NC  
80  
70  
60  
50  
40  
30  
20  
10  
0
6
GND  
V
= 4 V  
V
C
C
= 5.5 V  
IN  
OUT  
OUT  
GND  
NR  
IN  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0.0  
C
C
= 10 µF  
= 2.2 µF  
OUT  
= 0.01 µF  
OUT  
= 0.1 µF  
NR  
I
= 1 mA  
OUT  
NR  
I
= 1 A  
OUT  
KTT (DDPAK) PACKAGE  
(TOP VIEW)  
I
= 1 mA  
OUT  
EN  
IN  
GND  
OUT  
NR/FB  
1
2
I
= 1.5 A  
1k  
3
4
OUT  
1
10 100  
1k 10k 100k 1M 10M  
100  
10k  
100k  
5
Frequency (Hz)  
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  
1234567...18

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