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參數(shù)資料
| 型號(hào)： | TPS79428DGNR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR REGULATORS |
| 中文描述： | 超低噪聲，高PSRR，快速射頻250毫安低壓降線性穩(wěn)壓器 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 487K |
| 代理商： | TPS79428DGNR |
www.ti.com
FEATURES
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 μVrms, TPS79428)
Fast Start-Up Time (50 μs)
Stable With a 2.2-μF 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 and SOT223-6 pack-
ages. Each device in the family is stable with a small
2.2-μF 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 μs with a 0.001-μF
bypass capacitor) while consuming 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 TPS79428 exhibits
approximately 32 μV
RMS
of output voltage noise at
2.8 V output with a 0.1-μF bypass capacitor. Appli-
cations
with
analog
noise-sensitive, such as portable RF electronics,
benefit from the high PSRR and low noise features as
well as the fast response time.
APPLICATIONS
RF: VCOs, Receivers, ADCs
Audio
Bluetooth, Wireless LAN
Cellular and Cordless Telephones
Handheld Organizers, PDAs
OUT
NC
FB
NR
NC No internal connection
1
2
3
4
5
DCQ PACKAGE
SOT223-6
(TOP VIEW)
NR
OUT
GND
IN
EN
2
3
4
1
7
6
5
8
IN
NC
EN
GND
DGN PACKAGE
MSOP PowerPAD
(TOP VIEW)
I
OUT
= 10 mA
I
OUT
= 250 mA
V
IN
= 4.3 V,
V
OUT
= 3.3 V,
C
IN
= 1
μ
F,
C
OUT
= 10
μ
F,
C
NR
= 0.01
μ
F
40
20
10
10
100
1 k
10 k
R
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
I
OUT
= 250 mA
I
OUT
= 1 mA
C
OUT
= 2.2
μ
F,
C
NR
= 0.1
μ
F,
V
IN
= 3.8 V
TPS79428
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
Frequency (Hz)
100
1000
10000
100000
6
GND
O
μ
V
√
H
TPS79401, TPS79418
TPS79425, TPS79428
TPS79430, TPS79433
SLVS349D–NOVEMBER 2001–REVISED OCTOBER 2004
ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR
REGULATORS
components
that
are
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 2001–2004, Texas Instruments Incorporated
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| TPS79428DGNRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 250-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79428DGNT | 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 250-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79428DGNTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 250-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79430DCQ | 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 250-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79430DCQG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output 250mA Fixed 3.0V Hi PSRR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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