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TPS79228 Datasheet

  • TPS79228

  • 超低噪聲、高 PSRR、快速射頻、高電平啟用的 100mA 低壓降穩(wěn)壓器

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  • TI

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Actual Size
(3,00 mm x 3,00 mm)
Actual Size
(3,00 mm x 3,00 mm)
TPS79201, TPS79225
TPS79228, TPS79230
SLVS337B 鈥?MARCH 2001 鈥?REVISED MAY 2002
ULTRALOW-NOISE, HIGH PSRR, FAST RF 100-mA
LOW-DROPOUT LINEAR REGULATORS
FEATURES
D
100-mA Low-Dropout Regulator With EN
D
Available in 2.5-V, 2.8-V, 3-V, and Adj.
D
High PSRR (75 dB at 10 kHz)
D
Ultralow Noise (27
碌V)
D
Fast Start-Up Time (50
碌s)
D
Stable With Any 1-碌F Ceramic Capacitor
D
Excellent Load/Line Transient
D
Very Low Dropout Voltage
D
D
TPS791xx Provides EN Options
APPLICATIONS
D
Cellular and Cordless Telephones
D
VCOs
D
RF
D
Bluetooth錚? Wireless LAN
D
Handheld Organizers, PDA
DBV PACKAGE
(TOP VIEW)
IN
GND
EN
1
2
Ripple Rejection 鈥?dB
DESCRIPTION
The TPS792xx 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-碌F 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
碌s
with a 0.001
碌F
bypass
capacitor) while consuming very low quiescent
current (170
碌A(chǔ)
typical). Moreover, when the
device is placed in standby mode, the supply
current is reduced to less than 1
碌A(chǔ).
The
TPS79228 exhibits approximately 27
碌V
RMS
of
output voltage noise with a 0.1
碌F
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.
(55 mV at Full Load, TPS79230)
5-Pin SOT23 (DBV) Package
TPS79228
TPS79228
5
OUT
90
80
RIPPLE REJECTION
vs
FREQUENCY
IO = 100 mA
Hz
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.3
VI = 3.8 V
Co = 1
碌F
C(byp) = 0.1
碌F
碌
V/
Output Spectral Noise Density 鈥?/div>
3
4
BYPASS
0.25
0.2
70
60
50
40
30
20
10
0
10
VI = 3.8 V
Co = 10
碌F
C(byp) = 0.01
碌F
100
1k
10 k
100 k
1M
10 M
IO = 10 mA
Fixed Option
DBV PACKAGE
(TOP VIEW)
IN
GND
EN
1
2
3
6
5
4
OUT
FB
BYPASS
0.15
IO = 1 mA
0.1
IO = 100 mA
0.05
0
100
Adjustable Option
f 鈥?Frequency 鈥?Hz
1k
10k
f 鈥?Frequency 鈥?Hz
100k
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.
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
錚?/div>
2002, Texas Instruments Incorporated

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