TPS73033 Datasheet, PDF (1/13 Pages) Texas Instruments – LOW-NOISE, HIGH PSRR, RF 200-mA LOW-DROPOUT LINEAR REGULATORS

www.ti.com
DBV 5 ^{DBV 6}
TPS73001, TPS73018
TPS73025
TPS73030, TPS73033
SBVS054A – NOVEMBER 2004 – REVISED NOVEMBER 2004
LOW-NOISE, HIGH PSRR, RF 200-mA
LOW-DROPOUT LINEAR REGULATORS
FEATURES
• 200-mA RF Low-Dropout Regulator
With Enable
• Available in 1.8-V, 2.5-V, 3-V, 3.3-V, and
Adjustable (1.22-V to 5.5-V)
• High PSRR (68dB at 1 kHz)
• Ultralow-Noise (23 µV_RMS, TPS73018)
• Fast Start-Up Time (50 µs)
• Stable With a 2.2-µF Ceramic Capacitor
• Excellent Load/Line Transient Response
• Very Low Dropout Voltage (120 mV at Full
Load)
• 5- and 6-Pin SOT23 (DBV) Package
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. Each device in
the family is stable, with a small 2.2-µF ceramic
capacitor on the output. The TPS730xx family uses
an advanced, proprietary BiCMOS fabrication pro-
cess to yield low dropout voltages (e.g., 120 mV at
200 mA, TPS73030). Each device achieves fast
start-up times (approximately 50 µs with a 0.001-µF
bypass capacitor) while consuming 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 TPS73018 exhibits
approximately 23 µV_RMS of output voltage noise at
2.8-V output with a 0.01-µF bypass capacitor. Appli-
cations 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
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.
Bluetooth is a 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, Texas Instruments Incorporated