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TPS796XX_08

更新时间： 2024-11-15 04:48:31
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
25页 1066K
描述
ULTRALOW-NOISE, HIGH PSRR, FAST, RF, 1A LOW-DROPOUT LINEAR REGULATORS

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TPS796XX_08 数据手册

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TPS796xx  
www.ti.com  
SLVS351K–SEPTEMBER 2002–REVISED FEBRUARY 2008  
ULTRALOW-NOISE, HIGH PSRR, FAST, RF, 1A  
LOW-DROPOUT LINEAR REGULATORS  
1
FEATURES  
DESCRIPTION  
234  
•
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 (for example, 250mV at 1A). Each  
device achieves fast start-up times (approximately  
•
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)  
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.  
•
3 × 3 SON PowerPAD™, 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  
DQC PACKAGE  
SOT223-6  
(TOP VIEW)  
IN  
IN  
1
2
3
4
8
7
6
5
EN  
FREQUENCY  
FREQUENCY  
NC  
80  
70  
60  
50  
40  
30  
20  
10  
0
0.7  
OUT  
OUT  
GND  
NR/FB  
V
= 4 V  
V
= 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  
C
OUT  
= 10 mF  
C
= 2.2 mF  
OUT  
= 0.1 mF  
NR  
I
= 1 mA  
C
NR  
= 0.01 mF  
C
OUT  
6
GND  
OUT  
GND  
I
= 1 A  
OUT  
5
NR/FB  
KTT (DDPAK) PACKAGE  
(TOP VIEW)  
I
= 1 mA  
OUT  
EN  
1
2
IN  
GND  
I
= 1.5 A  
OUT  
3
4
OUT  
1
10 100  
1k 10k 100k 1M 10M  
100  
1k  
10k  
100k  
NR/FB  
Frequency (Hz)  
Frequency (Hz)  
5
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
PowerPAD is a trademark of Texas Instruments Inc.  
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 © 2002–2008, Texas Instruments Incorporated  
1234567...25

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