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TPS792

更新时间： 2024-09-27 11:07:55
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德州仪器 - TI 稳压器
页数 文件大小 规格书
19页 472K
描述
具有使能功能的 100mA、高 PSRR、低压降稳压器

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TPS792 数据手册

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TPS79201,TPS79225  
TPS79228,TPS79230  
Actual Size  
(3,00 mm x 3,00 mm)  
Actual Size  
(3,00 mm x 3,00 mm)  
www.ti.com  
SLVS337B – MARCH 2001 – REVISED MAY 2002  
ULTRALOW-NOISE, HIGH PSRR, FAST RF 100-mA  
LOW-DROPOUT LINEAR REGULATORS  
FEATURES  
DESCRIPTION  
The TPS792xx family of low-dropout (LDO)  
D
D
D
D
D
D
D
D
100-mA Low-Dropout Regulator With EN  
Available in 2.5-V, 2.8-V, 3-V, and Adj.  
High PSRR (75 dB at 10 kHz)  
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, SOT23,  
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 (e.g., 55 mV at 100 mA, TPS79230).  
Each device achieves fast start-up times  
(approximately 50 µs with a 0.001 µF bypass  
capacitor) while consuming very low quiescent  
current (170 µA typical). Moreover, when the  
device is placed in standby mode, the supply  
current is reduced to less than 1 µA. The  
Ultralow Noise (27 µV)  
Fast Start-Up Time (50 µs)  
Stable With Any 1-µF Ceramic Capacitor  
Excellent Load/Line Transient  
Very Low Dropout Voltage  
(55 mV at Full Load, TPS79230)  
D
5-Pin SOT23 (DBV) Package  
D
TPS791xx Provides EN Options  
APPLICATIONS  
D
D
D
D
D
Cellular and Cordless Telephones  
TPS79228 exhibits approximately 27 µV  
of  
RMS  
output voltage noise 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 the fast response time.  
VCOs  
RF  
Bluetooth , Wireless LAN  
Handheld Organizers, PDA  
TPS79228  
RIPPLE REJECTION  
vs  
TPS79228  
DBV PACKAGE  
(TOP VIEW)  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
IN  
GND  
EN  
1
2
5
OUT  
FREQUENCY  
FREQUENCY  
0.3  
90  
80  
I
= 100 mA  
V
= 3.8 V  
O
I
C
C
= 1 µF  
o
0.25  
0.2  
= 0.1 µF  
3
4
BYPASS  
(byp)  
70  
60  
FixedOption  
50  
40  
30  
0.15  
0.1  
DBV PACKAGE  
(TOP VIEW)  
I
= 1 mA  
O
I
= 10 mA  
O
IN  
GND  
EN  
1
2
6
5
OUT  
I
= 100 mA  
O
V
C
C
= 3.8 V  
= 10 µF  
I
0.05  
FB  
20  
10  
o
= 0.01 µF  
(byp)  
3
4
BYPASS  
0
100  
10  
100  
1 k  
10 k 100 k 1 M 10 M  
1k  
10k  
100k  
f – Frequency – Hz  
f – Frequency – Hz  
AdjustableOption  
Pleasebe 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 owned by the Bluetooth SIG, Inc.  
PRODUCTION DATA information is current as of publication date. Products  
conform to specifications per the terms of Texas Instruments standard warranty.  
Production processing does not necessarily include testing of all parameters.  
Copyright 2002, Texas Instruments Incorporated  
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