TPS79201,TPS79225
TPS79228,TPS79230
Actual Size
(3,00 mm x 3,00 mm)
Actual Size
(3,00 mm x 3,00 mm)
www.ti.com
SLVS337B – MARCH 2001 – REVISED MAY 2002
ULTRALOW-NOISE, HIGH PSRR, FAST RF 100-mA
LOW-DROPOUT LINEAR REGULATORS
FEATURES
DESCRIPTION
The TPS792xx family of low-dropout (LDO)
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100-mA Low-Dropout Regulator With EN
Available in 2.5-V, 2.8-V, 3-V, and Adj.
High PSRR (75 dB at 10 kHz)
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, SOT23,
package. Each device in the family is stable, with
a small 1-µF ceramic capacitor on the output. The
family uses an advanced, proprietary BiCMOS
fabrication process to yield extremely low dropout
voltages (e.g., 55 mV at 100 mA, TPS79230).
Each device achieves fast start-up times
(approximately 50 µs with a 0.001 µF bypass
capacitor) while consuming very 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
Ultralow Noise (27 µV)
Fast Start-Up Time (50 µs)
Stable With Any 1-µF Ceramic Capacitor
Excellent Load/Line Transient
Very Low Dropout Voltage
(55 mV at Full Load, TPS79230)
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5-Pin SOT23 (DBV) Package
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TPS791xx Provides EN Options
APPLICATIONS
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Cellular and Cordless Telephones
TPS79228 exhibits approximately 27 µV
of
RMS
output voltage noise with a 0.1 µF 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.
VCOs
RF
Bluetooth , Wireless LAN
Handheld Organizers, PDA
TPS79228
RIPPLE REJECTION
vs
TPS79228
DBV PACKAGE
(TOP VIEW)
OUTPUT SPECTRAL NOISE DENSITY
vs
IN
GND
EN
1
2
5
OUT
FREQUENCY
FREQUENCY
0.3
90
80
I
= 100 mA
V
= 3.8 V
O
I
C
C
= 1 µF
o
0.25
0.2
= 0.1 µF
3
4
BYPASS
(byp)
70
60
FixedOption
50
40
30
0.15
0.1
DBV PACKAGE
(TOP VIEW)
I
= 1 mA
O
I
= 10 mA
O
IN
GND
EN
1
2
6
5
OUT
I
= 100 mA
O
V
C
C
= 3.8 V
= 10 µF
I
0.05
FB
20
10
o
= 0.01 µF
(byp)
3
4
BYPASS
0
100
10
100
1 k
10 k 100 k 1 M 10 M
1k
10k
100k
f – Frequency – Hz
f – Frequency – Hz
AdjustableOption
Pleasebe 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 owned by the Bluetooth SIG, Inc.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2002, Texas Instruments Incorporated