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ꢀ ꢁꢂꢃ ꢄ ꢅ ꢉ ꢉ ꢇ ꢀꢁ ꢂ ꢃꢄ ꢅꢊ ꢃ
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www.ti.com
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SLVS325C − MARCH 2001 − REVISED MAY 2002
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FEATURES
DESCRIPTION
D
D
D
D
D
D
D
D
100-mA Low-Dropout Regulator With EN
The TPS791xx 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 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., 38 mV at 100 mA, TPS79147).
Each device achieves fast start-up times
(approximately 63 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
Available in 1.8-V, 3.3-V, 4.7-V, and Adj.
High PSRR (70 dB at 10 kHz)
Ultralow Noise (15 µV
)
RMS
Fast Start-Up Time (63 µs)
Stable With Any 1-µF Ceramic Capacitor
Excellent Load/Line Transient
Very Low Dropout Voltage
(38 mV at Full Load, TPS79147)
D
5-Pin SOT23 (DBV) Package
D
TPS792xx Provides EN Options
APPLICATIONS
D
D
D
D
D
Cellular and Cordless Telephones
TPS79118 exhibits approximately 15 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
TPS79133
DBV PACKAGE
(TOP VIEW)
TPS79133
OUTPUT SPECTRAL NOISE DENSITY
vs
RIPPLE REJECTION
vs
IN
GND
EN
1
2
5
OUT
FREQUENCY
FREQUENCY
100
90
0.4
V
C
C
= 4.3 V
I
V
= 4.3 V
= 1 µF
= 10 µF
O
0.35
0.3
o
3
4
BYPASS
C
o
= 0.01 µF
(byp)
80
70
60
50
40
I
= 100 mA
O
C
(byp)
= 0.1 µF
Fixed Option
0.25
0.2
DBV PACKAGE
(TOP VIEW)
I
= 100 mA
O
0.15
0.1
I
= 10 mA
O
IN
1
2
6
5
OUT
I
= 1 mA
O
GND
FB
0.05
30
20
EN
3
4
BYPASS
0
100
10
100
1 k
10 k 100 k 1 M 10 M
1 k
10 k
100 k
Adjustable Option
f − Frequency − Hz
f − Frequency − Hz
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 owned by the Bluetooth SIG, Inc.
ꢁꢍ ꢏ ꢙꢋ ꢚ ꢀꢒ ꢏꢑ ꢙ ꢎꢀꢎ ꢛꢜ ꢝꢞ ꢟ ꢘꢠ ꢡꢛꢞꢜ ꢛꢢ ꢣꢤ ꢟ ꢟ ꢥꢜꢡ ꢠꢢ ꢞꢝ ꢦꢤꢧ ꢨꢛꢣ ꢠꢡꢛ ꢞꢜ ꢩꢠ ꢡꢥꢪ ꢁꢟ ꢞꢩꢤ ꢣꢡꢢ
ꢣ ꢞꢜ ꢝꢞꢟ ꢘ ꢡꢞ ꢢ ꢦꢥ ꢣ ꢛ ꢝꢛ ꢣ ꢠ ꢡꢛ ꢞꢜꢢ ꢦ ꢥꢟ ꢡꢫꢥ ꢡꢥ ꢟ ꢘꢢ ꢞꢝ ꢀꢥꢬ ꢠꢢ ꢒꢜꢢ ꢡꢟ ꢤꢘ ꢥꢜꢡ ꢢ ꢢꢡ ꢠꢜꢩ ꢠꢟ ꢩ ꢭ ꢠꢟ ꢟ ꢠ ꢜꢡꢮꢪ
ꢁꢟ ꢞ ꢩꢤꢣ ꢡ ꢛꢞ ꢜ ꢦꢟ ꢞ ꢣ ꢥ ꢢ ꢢ ꢛꢜ ꢯ ꢩꢞ ꢥ ꢢ ꢜꢞꢡ ꢜꢥ ꢣꢥ ꢢꢢ ꢠꢟ ꢛꢨ ꢮ ꢛꢜꢣ ꢨꢤꢩ ꢥ ꢡꢥ ꢢꢡꢛ ꢜꢯ ꢞꢝ ꢠꢨ ꢨ ꢦꢠ ꢟ ꢠꢘ ꢥꢡꢥ ꢟ ꢢꢪ
Copyright 2002, Texas Instruments Incorporated