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TPS79333_15

更新时间： 2024-11-15 01:19:07
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德州仪器 - TI /
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28页 918K
描述
TPS793 Low-Noise, High PSRR, RF, 200-mA Low-Dropout Linear Regulators in NanoStar™ Wafer Chip Scale and SOT-23

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TPS793  
SLVS348L –JULY 2001–REVISED MAY 2015  
TPS793 Low-Noise, High PSRR, RF, 200-mA Low-Dropout Linear Regulators in  
NanoStar™ Wafer Chip Scale and SOT-23  
1 Features  
3 Description  
The TPS793 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 these devices ideal for portable applications  
such as handsets and PDAs. Each device in the  
1
•
200-mA RF Low-Dropout Regulator  
With Enable  
•
Available in Fixed-Voltage Versions from 1.8 V to  
4.75 V and Adjustable (1.22 V to 5.5 V)  
•
•
•
•
•
•
High PSRR (70 dB at 10 kHz)  
Low Noise (32 μVRMS, TPS79328)  
Fast Start-Up Time (50 μs)  
Stable With a 2.2-μF Ceramic Capacitor  
Excellent Load and Line Transient Response  
family is stable, with  
a small, 2.2-μF ceramic  
capacitor on the output. The TPS793 family uses an  
advanced, proprietary BiCMOS fabrication process to  
yield extremely low dropout voltages (for example,  
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 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  
TPS79328 exhibits approximately 32 μVRMS of output  
voltage noise at 2.8-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 and low-noise features  
as well as the fast response time.  
Very Low Dropout Voltage (112 mV at 200 mA,  
TPS79330)  
•
5- and 6-Pin SOT23 (DBV) and NanoStar Wafer  
Chip Scale (YZQ) Packages  
2 Applications  
•
•
•
•
•
RF: VCOs, Receivers, ADCs  
Audio  
Cellular and Cordless Telephones  
Bluetooth®, Wireless LAN  
Handheld Organizers, PDAs  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
2.90 mm × 1.60 mm  
2.90 mm × 1.60 mm  
1.35 mm × 1.00 mm  
SOT-23 (6)  
TPS793  
SOT-23 (5)  
DSBGA (5)  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Typical Application Circuit  
Ripple Rejection vs Frequency  
100  
VIN  
VOUT  
VIN  
VOUT  
V
= 3.8 V  
IN  
OUT  
IN  
90  
80  
70  
60  
50  
40  
C
= 2.2 mF  
OUT  
TPS79328  
C
NR  
= 0.1 mF  
I
= 200 mA  
OUT  
10 mF  
0.1 mF  
EN  
GND  
NR  
0.01 mF  
I
= 10 mA  
OUT  
30  
20  
10  
0
10  
100  
1 k  
10 k 100 k 1 M 10 M  
Frequency (Hz)  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
 
 
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