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TPS796XX

更新时间： 2024-11-15 04:48:31
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德州仪器 - TI 稳压器
页数 文件大小 规格书
33页 998K
描述
ULTRALOW-NOISE, HIGH PSRR, FAST, RF, 1A LOW-DROPOUT LINEAR REGULATORS

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TPS796XX 数据手册

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TPS796xx  
www.ti.com  
SLVS351I–SEPTEMBER 2002–REVISED MAY 2006  
ULTRALOW-NOISE, HIGH PSRR, FAST, RF, 1A  
LOW-DROPOUT LINEAR REGULATORS  
FEATURES  
DESCRIPTION  
•
1A 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 × 3 SON, SOT223-6,  
and DDPAK-5 packages. Each device in the family is  
stable with a small 1µF ceramic capacitor on the  
output. The family uses an advanced, proprietary  
BiCMOS fabrication process to yield extremely low  
dropout voltages (e.g., 250mV at 1A). Each device  
achieves fast start-up times (approximately 50µs with  
a 0.001µF 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 1µA. The  
TPS79630 exhibits approximately 40µVRMS of output  
voltage noise at 3.0V output, with a 0.1µF 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.  
•
Available in Fixed and Adjustable (1.2V to  
5.5V) Versions  
•
•
•
•
•
•
High PSRR (53dB at 10kHz)  
Ultralow-Noise (40µVRMS, TPS79630)  
Fast Start-Up Time (50µs)  
Stable With a 1µF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Very Low Dropout Voltage (250mV at Full  
Load, TPS79630)  
•
3 × 3 SON, SOT223-6, and  
DDPAK-5 Packages  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Bluetooth™, Wireless LAN  
Cellular and Cordless Telephones  
Handheld Organizers, PDAs  
DRB PACKAGE  
3mm x 3mm SON  
(TOP VIEW)  
TPS79630  
RIPPLE REJECTION  
vs  
TPS79630  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
FREQUENCY  
0.7  
DCQ PACKAGE  
IN  
IN  
1
2
3
4
8
7
6
5
EN  
FREQUENCY  
SOT223-6  
NC  
80  
70  
60  
50  
40  
30  
20  
10  
0
(TOP VIEW)  
OUT  
OUT  
GND  
NR  
V
= 4 V  
V
C
C
= 5.5 V  
IN  
IN  
1
2
3
4
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0.0  
EN  
IN  
GND  
OUT  
NR/FB  
C
C
= 10 µF  
= 2.2 µF  
OUT  
= 0.01 µF  
OUT  
= 0.1 µF  
NR  
I
= 1 mA  
OUT  
NR  
6
GND  
I
= 1 A  
OUT  
5
KTT (DDPAK) PACKAGE  
(TOP VIEW)  
I
= 1 mA  
OUT  
EN  
1
2
IN  
GND  
OUT  
I
= 1.5 A  
OUT  
3
4
1
10 100  
1k 10k 100k 1M 10M  
100  
1k  
10k  
100k  
NR/FB  
Frequency (Hz)  
Frequency (Hz)  
5
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 © 2002–2006, Texas Instruments Incorporated  
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