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TPS79516 Datasheet

  • TPS79516

  • ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA LOW-DROPOUT LINEAR...

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  • TI

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TPS79501, TPS79516
TPS79518, TPS79525
TPS79530, TPS79533
SLVS350B 鈥?OCTOBER 2002 鈥?REVISED OCTOBER 2004
ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA
LOW-DROPOUT LINEAR REGULATORS
FEATURES
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500-mA Low-Dropout Regulator With Enable
Available in 1.6-V, 1.8-V, 2.5-V, 3-V, 3.3-V, and
Adjustable (1.2-V to 5.5-V)
High PSRR (50 dB at 10 kHz)
Ultralow Noise (33 碌V
RMS
, TPS79530)
Fast Start-Up Time (50 碌s)
Stable With a 1-碌F Ceramic Capacitor
Excellent Load/Line Transient Response
Very Low Dropout Voltage (110 mV at Full
Load, TPS79530)
6-Pin SOT223-6 Package
DESCRIPTION
The TPS795xx 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 a small outline, SOT223-6, package.
Each device in the family is stable with a small 1-碌F
ceramic capacitor on the output. The family uses an
advanced, proprietary BiCMOS fabrication process to
yield extremely low dropout voltages (for example,
110 mV at 500 mA). Each device achieves fast
start-up times (approximately 50 碌s with a 0.001-碌F
bypass capacitor) while consuming very low quiesc-
ent current (265 碌A(chǔ) typical). Moreover, when the
device is placed in standby mode, the supply current
is reduced to less than 1 碌A(chǔ). The TPS79530 exhibits
approximately 33 碌V
RMS
of output voltage noise at
3.0 V output with a 0.1-碌F bypass capacitor. Appli-
cations with analog components that are noise sensi-
tive, such as portable RF electronics, benefit from the
high PSRR and low noise features, as well as the fast
response time.
TPS79530
APPLICATIONS
RF: VCOs, Receivers, ADCs
Audio
Bluetooth鈩? Wireless LAN
Cellular and Cordless Telephones
Handheld Organizers, PDAs
TPS79530
RIPPLE REJECTION
vs
FREQUENCY
80
Output Spectral Noise Density 鈭?/div>
碌V//Hz
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.5
V
IN
= 5.5 V
C
OUT
= 2.2
碌F
C
NR
= 0.1
碌F
Ripple Rejection 鈭?dB
DCQ PACKAGE
SOT223-6
(TOP VIEW)
EN
IN
GND
OUT
NR/FB
1
2
3
4
5
70
60
50
40
30
20
10
0
1
V
IN
= 4 V
C
OUT
= 10
碌F
C
NR
= 0.01
碌F
I
OUT
= 1 mA
0.4
0.3
I
OUT
= 1 mA
6
GND
I
OUT
= 500 mA
0.2
I
OUT
= 0.5 A
0.1
10
100
1 k 10 k 100 k 1 M
Frequency (Hz)
10 M
0
100
1k
10 k
Frequency (Hz)
100 k
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 漏 2002鈥?004, Texas Instruments Incorporated

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