TPS730xx
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B
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www.ti.com
SBVS054H–NOVEMBER 2004–REVISED OCTOBER 2007
LOW-NOISE, HIGH PSRR, RF 200-mA
LOW-DROPOUT LINEAR REGULATORS
1
FEATURES
DESCRIPTION
234
•
200-mA RF Low-Dropout Regulator
The TPS730xx 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 a small SOT23 package. 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 2.2μF
ceramic capacitor on the output. The TPS730xx
family uses an advanced, proprietary BiCMOS
fabrication process to yield low dropout voltages (e.g.,
120mV at 200mA, TPS73030). Each device achieves
With Enable
•
Available in Fixed Voltages from 1.8V to 3.3V
and Adjustable (1.22V to 5.5V)
•
•
•
•
•
•
•
High PSRR (68dB at 100Hz)
Ultralow-Noise (33μVRMS, TPS73018)
Fast Start-Up Time (50μs)
Stable With a 2.2μF Ceramic Capacitor
Excellent Load/Line Transient Response
Very Low Dropout Voltage (120mV at 200mA)
5- and 6-Pin SOT23 (DBV), and Wafer Chip
Scale (YZQ) Packages
fast start-up times (approximately 50μs with
a
0.001μF bypass capacitor) while consuming low
quiescent current (170μA typical). Moreover, when
the device is placed in standby mode, the supply
current is reduced to less than 1μA. The TPS73018
exhibits approximately 33μVRMS of output voltage
noise at 1.8V output with a 0.01μF 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.
APPLICATIONS
•
•
•
•
•
RF: VCOs, Receivers, ADCs
Audio
Cellular and Cordless Telephones
Bluetooth®, Wireless LAN
Handheld Organizers, PDAs
DBV PACKAGE
(TOP VIEW)
TPS73028
TPS73028
OUT
NR
IN
1
2
5
RIPPLE REJECTION
vs
OUTPUT SPECTRAL NOISE DENSITY
vs
GND
FREQUENCY
FREQUENCY
0.30
100
90
3
4
EN
V
= 3.8 V
IN
I
= 200 mA
OUT
Fixed Option
C
C
= 2.2 µF
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
OUT
Adjustable Option
20
10
0
V
C
C
= 3.8 V
= 10 µF
IN
YZQ PACKAGE
(TOP VIEW)
OUT
= 0.01 µF
NR
0
100
1 k
10 k
100 k
10
100
1 k
10 k 100 k 1 M 10 M
IN
OUT
C3 C1
B2
A3 A1
Frequency (Hz)
Frequency (Hz)
NR
GND
EN
Figure 1.
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.
2
3
4
NanoStar is a trademark of Texas Instruments.
Bluetooth is a registered 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 © 2004–2007, Texas Instruments Incorporated