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TPS79418 Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza TPS79418
Descripción Electrónicos  ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS79418 Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
APPLICATIONS
EN
OUT
NC − No internal connection
1
2
3
4
5
DCQ PACKAGE
NR/FB
OUT
GND
IN
EN
2
1
3
4
7
8
6
5
NC
FB
NR
IN
NC
GND
SOT223-6
(TOP VIEW)
DGN PACKAGE
MSOP-8 PowerPADt
(TOP VIEW)
IOUT = 10 mA
IOUT = 250 mA
VIN = 4.3 V,
VOUT = 3.3 V,
CIN = 1 µF,
COUT = 10 µF,
CNR = 0.01 µF
40
20
10
10
100
1 k
10 k
60
70
Frequency (Hz)
TPS79433
RIPPLE REJECTION
vs
FREQUENCY
90
100 k
1 M
10 M
0
30
50
80
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
IOUT = 250 mA
IOUT = 1 mA
COUT = 2.2 µF,
CNR = 0.1 µF,
VIN = 3.8 V
TPS79428
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
Frequency (Hz)
100
1000
10000
100000
6
GND
TPS794xx
SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005
ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA
LOW-DROPOUT LINEAR REGULATORS
• 250-mA Low-Dropout Regulator With Enable
The TPS794xx family of low-dropout (LDO) linear
voltage
regulators
features
high
power-supply
• Available in Fixed and Adjustable (1.2 V to
rejection ratio (PSRR), ultralow-noise, fast start-up,
5.5 V) Versions
and excellent line and load transient responses in
• High PSRR (60 dB at 10 kHz)
small outline, MSOP-8 PowerPAD™ and SOT223-6
• Ultralow Noise (32 µVrms, TPS79428)
packages. Each device in the family is stable with a
small 2.2-
µF ceramic capacitor on the output. The
• Fast Start-Up Time (50 µs)
family uses an advanced,
proprietary
BiCMOS
• Stable With a 2.2-µF Ceramic Capacitor
fabrication process to yield extremely low dropout
• Excellent Load/Line Transient Response
voltages (for example, 155 mV at 250 mA). Each
device achieves fast start-up times (approximately
• Very Low Dropout Voltage (155 mV at Full
50
µs with a 0.001-µF bypass capacitor) while
Load)
consuming low quiescent current (170
µA typical).
• Available in MSOP-8 and SOT223-6 Packages
Moreover, when the device is placed in standby
mode, the supply current is reduced to less than
1
µA. The TPS79428 exhibits approximately
• RF: VCOs, Receivers, ADCs
32
µV
RMS of output voltage noise at 2.8 V output with
a 0.1-
µF bypass capacitor. Applications with analog
• Audio
components
that
are
noise-sensitive,
such
as
• Bluetooth™, Wireless LAN
portable RF electronics, benefit from the high PSRR
• Cellular and Cordless Telephones
and low noise features as well as the fast response
• Handheld Organizers, PDAs
time.
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.
PowerPAD is a trademark of Texas Instruments.
Bluetooth is a trademark of Bluetooth SIG, Inc.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2001–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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