TPS73047 Datasheet, PDF (1/16 Pages) Texas Instruments – LOW-NOISE, HIGH PSRR, RF 200-mA LOW-DROPOUT LINEAR REGULATORS

DBV 5 DBV 6 YZQ
TPS730xx
www.ti.com
SBVS054G – NOVEMBER 2004 – REVISED DECEMBER 2006
LOW-NOISE, HIGH PSRR, RF 200-mA
LOW-DROPOUT LINEAR REGULATORS
FEATURES
• 200-mA RF Low-Dropout Regulator
With Enable
• Available in Fixed Voltages from 1.8V to 3.3V
and Adjustable (1.22V to 5.5V)
• High PSRR (68dB at 1kHz)
• Ultralow-Noise (23µV_RMS, 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
APPLICATIONS
• RF: VCOs, Receivers, ADCs
• Audio
• Cellular and Cordless Telephones
• Bluetooth^®, Wireless LAN
• Handheld Organizers, PDAs
DESCRIPTION
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 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 23µV_RMS
of output voltage noise at 2.8V 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.
DBV PACKAGE
(TOP VIEW)
IN
15
OUT
GND
2
EN
34
NR
Fixed Option
DBV PACKAGE
(TOP VIEW)
IN
16
OUT
GND
25
FB
EN
34
NR
Adjustable Option
YZQ PACKAGE
(TOP VIEW)
IN
OUT
C3 C1
B2 NR
A3 A1
EN
GND
TPS73028
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.30
0.25
V_IN = 3.8 V
C_OUT = 2.2 µF
C_NR = 0.1 µF
0.20
0.15
0.10
0.05
I_OUT = 1 mA
I_OUT = 200 mA
0
100
1k
10 k
Frequency (Hz)
100 k
TPS73028
RIPPLE REJECTION
vs
FREQUENCY
100
90
I_OUT = 200 mA
80
70
60
50
40
I_OUT = 10 mA
30
20 _{VIN = 3.8 V}
10 ^COUT ^{= 10 µF}
0 ^{CNR = 0.01 µF}
10 100 1 k 10 k 100 k 1 M 10 M
Frequency (Hz)
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.
NanoStar is a trademark of Texas Instruments.
Bluetooth is a registered trademark of Bluetooth Sig, Inc.
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 © 2004–2006, Texas Instruments Incorporated