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TPS79425DGNT Datasheet

  • TPS79425DGNT

  • ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR...

  • 15頁

  • TI

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TPS79401, TPS79418
TPS79425, TPS79428
TPS79430, TPS79433
SLVS349D 鈥?NOVEMBER 2001 鈥?REVISED OCTOBER 2004
ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR
REGULATORS
FEATURES
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250-mA Low-Dropout Regulator With Enable
Available in 1.8 V, 2.5 V, 2.8 V, 3 V, 3.3 V, and
Adjustable (1.2 V to 5.5 V)
High PSRR (60 dB at 10 kHz)
Ultralow Noise (32 碌Vrms, TPS79428)
Fast Start-Up Time (50 碌s)
Stable With a 2.2-碌F Ceramic Capacitor
Excellent Load/Line Transient Response
Very Low Dropout Voltage (155 mV at Full
Load)
Available in MSOP-8 and SOT223-6 Packages
DESCRIPTION
The TPS794xx family of low-dropout (LDO) linear
voltage regulators features high power-supply rejec-
tion ratio (PSRR), ultralow-noise, fast start-up, and
excellent line and load transient responses in small
outline, MSOP-8 PowerPAD鈩?and SOT223-6 pack-
ages. Each device in the family is stable with a small
2.2-碌F ceramic capacitor on the output. The family
uses an advanced, proprietary BiCMOS fabrication
process to yield extremely low dropout voltages (e.g.,
155 mV at 250 mA). Each device achieves fast
start-up times (approximately 50 碌s with a 0.001-碌F
bypass capacitor) while consuming 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 TPS79428 exhibits
approximately 32 碌V
RMS
of output voltage noise at
2.8 V output with a 0.1-碌F 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.
TPS79428
APPLICATIONS
RF: VCOs, Receivers, ADCs
Audio
Bluetooth鈩? Wireless LAN
Cellular and Cordless Telephones
Handheld Organizers, PDAs
DGN PACKAGE
MSOP PowerPAD
(TOP VIEW)
OUT
NC
FB
NR
1
2
3
4
8
7
6
5
TPS79433
80
Ripple Rejection (dB)
70
60
50
40
30
20
I
OUT
= 10 mA
I
OUT
= 250 mA
Output Spectral Noise Density (碌V/鈭欻z)
IN
NC
EN
GND
RIPPLE REJECTION
vs
FREQUENCY
90
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
I
OUT
= 1 mA
I
OUT
= 250 mA
C
OUT
= 2.2
碌F,
C
NR
= 0.1
碌F,
V
IN
= 3.8 V
NC 鈭?No internal connection
DCQ PACKAGE
SOT223-6
(TOP VIEW)
EN
IN
GND
OUT
NR
1
2
3
4
5
6
GND
10
0
10
V
IN
= 4.3 V,
V
OUT
= 3.3 V,
C
IN
= 1
碌F,
C
OUT
= 10
碌F,
C
NR
= 0.01
碌F
100
1k
10 k
100 k
1M
10 M
100
1000
10000
100000
Frequency (Hz)
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 of Bluetooth SIG, Inc.
PowerPAD is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
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 漏 2001鈥?004, Texas Instruments Incorporated

TPS79425DGNT 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 線性

  • -

  • 正，固定式

  • 2.5V

  • 2.7 V ~ 5.5 V

  • -

  • 1

  • 250mA（最小值）

  • -40°C ~ 125°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤

  • 8-MSOP-PowerPad

  • Digi-Reel®

  • 296-19048-ND - EVAL MODULE FOR XILINX FPGA

  • 296-14432-6

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