TPS7A8101 Datasheet, PDF (1/24 Pages) Texas Instruments – Low-Noise, Wide-Bandwidth, High PSRR, Low-Dropout 1-A Linear Regulator

TPS7A8101
www.ti.com
SBVS179A – DECEMBER 2011 – REVISED APRIL 2012
Low-Noise, Wide-Bandwidth, High PSRR,
Low-Dropout 1-A Linear Regulator
FEATURES
1
•2 Low-Dropout 1-A Regulator with Enable
• Adjustable Output Voltage: 0.8 V to 6.0 V
• Wide-Bandwidth High PSRR:
– 80 dB at 1 kHz
– 60 dB at 100 kHz
– 54 dB at 1 MHz
• Low Noise: 23.5 μV_RMS typical (100 Hz to
100 kHz)
• Stable with a 4.7-μF Capacitance
• Excellent Load/Line Transient Response
• 3% Overall Accuracy (over
Load/Line/Temperature)
• Over-Current and Over-Temperature
Protection
• Very Low Dropout: 170 mV Typical at 1 A
• Package: 3-mm × 3-mm SON-8
APPLICATIONS
• Telecom Infrastructure
• Audio
• High-Speed I/F (PLL/VCO)
DESCRIPTION
The TPS7A8101 low-dropout linear regulator (LDO)
offers very good performance in noise and power-
supply rejection ratio (PSRR) at the output. This LDO
uses an advanced BiCMOS process and a
PMOSFET pass device to achieve very low noise,
excellent transient response, and excellent PSRR
performance.
The TPS7A8101 is stable with a 4.7-μF ceramic
output capacitor, and uses a precision voltage
reference and feedback loop to achieve a worst-case
accuracy of 3% over all load, line, process, and
temperature variations.
This device is fully specified over the temperature
range of T_J = –40°C to +125°C and is offered in a 3-
mm × 3-mm, SON-8 package with a thermal pad.
Typical Application Circuit
V_IN
IN
OUT
V_OUT
C_IN
TPS7A8101
R₁
C_BYPASS
EN
FB
GND NR
C_NR
R₂
C_OUT
V_EN
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
OUT 1
OUT 2
FB/SNS 3
GND 4
8 IN
7 IN
6 NR
5 EN
TYPICAL POWER-SUPPLY RIPPLE REJECTION
100
90
80
70
60
50
40
30
20
10
10
I_OUT= 10 mA
I_OUT= 100 mA
I_OUT= 750 mA
I_OUT= 1 A
100
1k
10k 100k
1M
10M
Frequency (Hz)
G103
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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 © 2011–2012, Texas Instruments Incorporated