Datasheet

1
2
3
4
5
6
GND
NR/FB
OUT
GND
IN
EN
1
KTT (DDPAK) PACKAGE
(TOP VIEW)
2
3
4
5
EN
IN
GND
OUT
NR/FB
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Frequency (Hz)
100 10k 100k1k
I
OUT
= 1 mA
TPS79630
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
I
OUT
= 1.5 A
V
IN
= 5.5 V
C
OUT
= 2.2 Fm
C
NR
= 0.1 mF
0
10
20
30
40
50
60
70
80
Frequency (Hz)
1 10k 10M1k
Ripple Rejection − dB
I
OUT
= 1 mA
TPS79630
RIPPLE REJECTION
vs
FREQUENCY
I
OUT
= 1 A
V
IN
= 4 V
C
OUT
= 10 Fm
C
NR
= 0.01 mF
10 100 100k 1M
EN
NC
GND
NR/FB
8
7
6
5
IN
IN
OUT
OUT
1
2
3
4
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
Output Spectral Noise Density V/- m Hz
Ö
DCQ PACKAGE
SOT223-6
(TOP VIEW)
TPS796
www.ti.com SLVS351O –SEPTEMBER 2002 –REVISED NOVEMBER 2013
Ultralow-Noise, High PSRR, Fast, RF, 1A
Low-Dropout Linear Regulators
1
FEATURES
DESCRIPTION
The TPS796xx family of low-dropout (LDO) low-
234
• 1A Low-Dropout Regulator With Enable
power linear voltage regulators features high power
• Available in Fixed and Adjustable (1.2V to
supply rejection ratio (PSRR), ultralow-noise, fast
5.5V) Versions
start-up, and excellent line and load transient
• High PSRR (53dB at 10kHz)
responses in small outline, 3 × 3 SON, SOT223-6,
and DDPAK-5 packages. Each device in the family is
• Ultralow-Noise (40μV
RMS
, TPS79630)
stable with a small 1μF ceramic capacitor on the
• Fast Start-Up Time (50μs)
output. The family uses an advanced, proprietary
• Stable With a 1μF Ceramic Capacitor
BiCMOS fabrication process to yield extremely low
dropout voltages (for example, 250mV at 1A). Each
• Excellent Load/Line Transient Response
device achieves fast start-up times (approximately
• Very Low Dropout Voltage (250mV at Full
50μs with a 0.001μF bypass capacitor) while
Load, TPS79630)
consuming very low quiescent current (265 μA
• 3 × 3 SON PowerPAD™, SOT223-6, and
typical). Moreover, when the device is placed in
DDPAK-5 Packages standby mode, the supply current is reduced to less
than 1μA. The TPS79630 exhibits approximately
40μV
RMS
of output voltage noise at 3.0V output, with
APPLICATIONS
a 0.1μF bypass capacitor. Applications with analog
• RF: VCOs, Receivers, ADCs
components that are noise sensitive, such as portable
• Audio
RF electronics, benefit from the high PSRR, low
noise features, and the fast response time.
• Bluetooth™, Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs
1
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.
2PowerPAD is a trademark of Texas Instruments Inc.
3Bluetooth is a trademark of Bluetooth SIG, Inc.
4All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2013, 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.