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TPS78618KTT Datasheet

  • TPS78618KTT

  • ULTRALOW-NOISE, HIGH PSRR, FAST RF 1.5 A LOW-DROPOUT LINEAR ...

  • 17頁

  • TI

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TPS78601, TPS78618
TPS78625, TPS78628
TPS78630, TPS78633
SLVS389D 鈥?SEPTEMBER 2002 鈥?REVISED OCTOBER 2004
ULTRALOW-NOISE, HIGH PSRR, FAST RF 1.5 A LOW-DROPOUT LINEAR
REGULATORS
FEATURES
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1.5 A 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 (49 dB at 10 kHz)
Ultralow Noise (48 碌V
RMS
, TPS79630)
Fast Start-Up Time (50 碌s)
Stable With a 1-碌F Ceramic Capacitor
Excellent Load/Line Transient Response
Very Low Dropout Voltage (390 mV at Full
Load, TPS78630)
6-Pin SOT223-6 and 5-Pin DDPAK Package
DESCRIPTION
The TPS786xx 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 small outline, SOT223-6 and 5-pin
DDPAK packages. 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., 390 mV at 1.5 A). 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 (265 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
TPS78630 exhibits approximately 48 碌V
RMS
of output
voltage at 3.0 V output 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, low noise features, and
the fast response time.
TPS78630
APPLICATIONS
RF: VCOs, Receivers, ADCs
Audio
Bluetooth鈩? Wireless LAN
Cellular and Cordless Telephones
Handheld Organizers, PDAs
DCQ PACKAGE
SOT223-6
(TOP VIEW)
EN
IN
GND
OUT
NR
1
2
3
4
5
80
TPS78630
RIPPLE REJECTION
vs
FREQUENCY
Output Spectral Noise Density 鈭?(碌V/ Hz)
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
100
I
OUT
= 1.5 A
I
OUT
= 1 mA
V
IN
= 5.5 V
C
OUT
= 2.2
碌F
C
NR
= 0.1
碌F
6
GND
Ripple Rejection 鈭?(dB)
70
60
50
I
OUT
= 1.5 A
40
30
20
10
0
1
10
100
1k
I
OUT
= 1 mA
V
IN
= 4 V
C
OUT
= 10
碌F
C
NR
= 0.01
碌F
KTT (DDPAK) PACKAGE
(TOP VIEW)
EN
IN
GND
OUT
NR
1
2
3
4
5
10k 100k
1M
10M
1k
10k
100k
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.
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 2002鈥?004, Texas Instruments Incorporated

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