Datasheet
Table Of Contents
0
10
20
30
40
50
60
70
80
1 10 100 1k 10k 100k 1M 10M
RippleRejection − dB
TPS79530
RIPPLEREJECTION
vs
FREQUENCY
V
IN
=4V
C
OUT
=10 mF
C
NR
=0.01 mF
I
OUT
=1mA
I
OUT
=500mA
Frequency (Hz)
Frequency(Hz)
0
0.1
0.2
0.3
0.4
0.5
100 1k 10k 100k
I
OUT
=1mA
V
IN
=5.5V
C
OUT
=2.2 mF
C
NR
=0.1 mF
I
OUT
=0.5A
TPS79530
OUTPUT SPECTRALNOISEDENSITY
vs
FREQUENCY
OutputSpectralNoiseDensity −
mV/
Ö
Hz
1
2
3
4
5
DCQ PACKAGE
SOT223-6
(TOPVIEW)
NR/FB
OUT
GND
IN
EN
6
GND
EN
NC
GND
NR/FB
8
7
6
5
IN
IN
OUT
OUT
1
2
3
4
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
TPS795xx
www.ti.com
SLVS350H –OCTOBER 2002–REVISED AUGUST 2010
ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 500-mA
LOW-DROPOUT LINEAR REGULATORS
Check for Samples: TPS795xx
1
FEATURES
DESCRIPTION
23
• 500-mA Low-Dropout Regulator With Enable
• Available in Fixed and Adjustable (1.2-V to
The TPS795xx family of low-dropout (LDO),
low-power linear voltage regulators features high
5.5-V) Versions
power-supply rejection ratio (PSRR), ultralow noise,
• High PSRR (50 dB at 10 kHz)
fast start-up, and excellent line and load transient
• Ultralow Noise (33 mV
RMS
, TPS79530)
responses in small outline, SOT223-6 and 3 x 3 SON
• Fast Start-Up Time (50 ms) packages. Each device in the family is stable with a
small 1-mF ceramic capacitor on the output. The
• Stable With a 1-mF Ceramic Capacitor
family uses an advanced, proprietary BiCMOS
• Excellent Load/Line Transient Response
fabrication process to yield extremely low dropout
• Low Dropout Voltage (110 mV at Full Load,
voltages (for example, 110 mV at 500 mA). Each
device achieves fast start-up times (approximately 50
TPS79530)
ms with a 0.001-mF bypass capacitor) while
• 6-Pin SOT223 and 3 × 3 SON Packages
consuming very low quiescent current (265 mA,
typical). Moreover, when the device is placed in
APPLICATIONS
standby mode, the supply current is reduced to less
• RF: VCOs, Receivers, ADCs
than 1 mA. The TPS79530 exhibits approximately 33
• Audio
mV
RMS
of output voltage noise at 3-V output with a
0.1-mF bypass capacitor. Applications with analog
• Bluetooth
®
, Wireless LAN
components that are noise-sensitive, such as
• Cellular and Cordless Telephones
portable RF electronics, benefit from the high-PSRR
• Handheld Organizers, PDAs
and low-noise features, as well as from the fast
response time.
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.
2Bluetooth is a registered trademark of Bluetooth SIG, Inc.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.