TPS79633-Q1 Datasheet, PDF (1/19 Pages) Texas Instruments – Ultralow-Noise, High-PSRR, Fast, RF, 1-A LOW-DROPOUT LINEAR REGULATORS

TPS796xx-Q1
www.ti.com
SBVS154 – MARCH 2012
Ultralow-Noise, High-PSRR, Fast, RF, 1-A
LOW-DROPOUT LINEAR REGULATORS
Check for Samples: TPS796xx-Q1
FEATURES
1
•23 Qualified for Automotive Applications
• AEC-Q100 Test Guidance With the Following
Results:
– Device Temperature Grade 1: –40°C to
125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3A
• 1-A Low-Dropout Regulator With Enable
• Available in Fixed and Adjustable (1.2 V to
5.5 V) Versions
• High PSRR (53 dB at 10 kHz)
• Ultralow-Noise (40 μV_RMS, TPS79630-Q1)
• Fast Start-Up Time (50 μs)
• Stable With a 1-μF Ceramic Capacitor
• Excellent Load/Line Transient Response
• Very Low Dropout Voltage (250 mV at Full
Load, TPS79630-Q1)
• SOT223-6 Package
APPLICATIONS
• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth™, Wireless LAN
DESCRIPTION
The TPS796xx-Q1 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 a small-outline SOT223-6 package.
Each device in the family is stable with a small 1-μF
ceramic capacitor on the output. The family uses an
advanced, proprietary BiCMOS fabrication process to
yield extremely low dropout voltages (for example,
250 mV at 1 A). Each device achieves fast start-up
times (approximately 50 μs with a 0.001-μF bypass
capacitor) while consuming very low quiescent
current (265 μA typical). Moreover, when the device
is placed in standby mode, the supply current is
reduced to less than 1 μA. The TPS79630-Q1
exhibits approximately 40 μV_RMS of output voltage
noise at 3-V output, with a 0.1-μF 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.
DQC PACKAGE
SOT223-6
(TOP VIEW)
EN
1
IN
2
GND
3
OUT
4
NR/FB
5
6
GND
TPS79630-Q1
RIPPLE REJECTION
vs
FREQUENCY
80
70
V_IN = 4 V
C_OUT = 10 mF
60
I_OUT = 1 mA
C_NR = 0.01 mF
50
I_OUT = 1 A
40
30
20
10
0
1 10 100 1 k 10 k 100 k 1 M 10 M
Frequency (Hz)
TPS79630-Q1
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.7
V_IN = 5.5 V
0.6 C_OUT = 2.2 mF
C_NR = 0.1 mF
0.5
0.4
0.3
I_OUT = 1 mA
0.2
0.1
0.0
100
I_OUT = 1.5 A
1k
10 k
Frequency (Hz)
100 k
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.
Bluetooth is a trademark of Bluetooth SIG, Inc.
2
All other trademarks are the property of their respective owners.
3
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated