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TPS793475

更新时间： 2024-11-13 22:52:47
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德州仪器 - TI 稳压器射频
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ULTRALOW-NOISE, HIGH PSRR, FAST RF 200-mA LOW-DROPOUT LINEAR REGULATORS IN NANOSTAR? WAFER CHIP SCALE AND SOT23

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TPS79301, TPS79318  
D
B
V
6
YEQ  
D
B
V
5
TPS79325, TPS79328, TPS793285  
TPS79330, TPS79333, TPS793475  
www.ti.com  
SLVS348H–JULY 2001–REVISED OCTOBER 2004  
ULTRALOW-NOISE, HIGH PSRR, FAST RF 200-mA LOW-DROPOUT LINEAR  
REGULATORS IN NanoStar™ WAFER CHIP SCALE AND SOT23  
FEATURES  
DESCRIPTION  
•
200-mA RF Low-Dropout Regulator  
With Enable  
The TPS793xx 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 NanoStar wafer chip scale and SOT23  
packages. NanoStar packaging gives an ultrasmall  
footprint as well as an ultralow profile and package  
weight, making it ideal for portable applications such  
as handsets and PDAs. Each device in the family is  
stable, with a small 2.2-µF ceramic capacitor on the  
output. The TPS793xx family uses an advanced,  
proprietary BiCMOS fabrication process to yield ex-  
tremely low dropout voltages (e.g., 112 mV at  
200 mA, TPS79330). Each device achieves fast  
start-up times (approximately 50 µs with a 0.001-µF  
bypass capacitor) while consuming very low quiesc-  
ent current (170 µA typical). Moreover, when the  
device is placed in standby mode, the supply current  
is reduced to less than 1 µA. The TPS79328 exhibits  
approximately 32 µVRMS of output voltage noise at  
2.8-V output with a 0.1-µF bypass capacitor. Appli-  
•
Available in 1.8-V, 2.5-V, 2.8-V, 2.85-V, 3-V,  
3.3-V, 4.75-V, and Adjustable (1.22-V to 5.5-V)  
•
•
•
•
•
•
High PSRR (70 dB at 10 kHz)  
Ultralow-Noise (32 µVRMS, TPS79328)  
Fast Start-Up Time (50 µs)  
Stable With a 2.2-µF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Very Low Dropout Voltage (112 mV at Full  
Load, TPS79330)  
•
5- and 6-Pin SOT23 (DBV) and NanoStar Wafer  
Chip Scale (YEQ) Packages  
APPLICATIONS  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Cellular and Cordless Telephones  
Bluetooth™, Wireless LAN  
Handheld Organizers, PDAs  
cations 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.  
DBV PACKAGE  
(TOP VIEW)  
TPS79328  
TPS79328  
OUT  
NR  
IN  
1
2
5
RIPPLE REJECTION  
vs  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
GND  
FREQUENCY  
FREQUENCY  
0.30  
3
4
100  
90  
EN  
V
= 3.8 V  
= 2.2 µF  
IN  
I
= 200 mA  
OUT  
Fixed Option  
C
C
OUT  
= 0.1 µF  
0.25  
0.20  
80  
NR  
DBV PACKAGE  
(TOP VIEW)  
70  
IN  
GND  
EN  
OUT  
FB  
1
2
6
5
60  
0.15  
50  
40  
30  
I
= 1 mA  
OUT  
I
= 10 mA  
OUT  
3
4
NR  
0.10  
0.05  
I
= 200 mA  
Adjustable Option  
YEQ  
OUT  
20  
10  
0
V
C
C
= 3.8 V  
= 10 µF  
IN  
PACKAGE  
(TOP VIEW)  
OUT  
= 0.01 µF  
NR  
0
IN  
OUT  
100  
1 k  
10 k  
100 k  
10  
100  
1 k  
10 k 100 k 1 M 10 M  
C3 C1  
B2  
A3 A1  
Frequency (Hz)  
Frequency (Hz)  
NR  
GND  
EN  
Figure 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.  
Bluetooth is a trademark of Bluetooth Sig, Inc.  
NanoStar is a trademark of Texas Instruments.  
UNLESS OTHERWISE NOTED this document contains PRO-  
DUCTION DATA information current as of publication date. Prod-  
ucts conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily  
include testing of all parameters.  
Copyright © 2001–2004, Texas Instruments Incorporated  
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