Datasheet

90
80
70
60
50
40
30
20
10
PSRR (dB)
10 100 1k 10k 100k 1M
Frequency (Hz)
10M
I = 10mA
OUT
I = 100mA
OUT
I = 750mA
OUT
I = 1A
OUT
V = 1.0V
DO
No C
IN
TYPICAL POWER-SUPPLY RIPPLE REJECTION
TPS7A8001
GND
EN FB
IN OUT
V
IN
V
OUT
4.7 Fm
Ceramic
V
EN
R
1
R
2
Optional 1.0 F input capacitor.
May improve source impedance,
noise, or PSRR.
m
NR
To avoid inrush current,
it is recommended to
always connect a
1nF to 10nF capacitor
Typical Application Circuit for Adjustable Voltage Versions
IN
NR
IN
EN
6
7
8
5
4
OUT
OUT
FB/SNS
GND
DRBPACKAGE
3mmx3mmSON
(TOPVIEW)
1
2
3
TPS7A80xx
www.ti.com SBVS135H –JUNE 2010–REVISED JANUARY 2013
Low-Noise, Wide-Bandwidth, High PSRR,
Low-Dropout 1A Linear Regulator
Check for Samples: TPS7A80xx
1
FEATURES
DESCRIPTION
The TPS7A80xx family of low-dropout linear
2
• Low-Dropout 1A Regulator with Enable
regulators (LDOs) offer very high power-supply ripple
• Available in Multiple Output Versions:
rejection (PSRR) at the output. This series of LDOs
– Fixed Output Voltages: 0.8V to 5.0V Using
uses an advanced BiCMOS process and a
Innovative Factory EEPROM Programming
PMOSFET pass device to achieve very low noise,
excellent transient response, and excellent PSRR
– Adjustable Output Voltages: 0.8V to 6.0V
performance.
• Wide-Bandwidth High PSRR:
The TPS7A80xx is stable with a 4.7μF ceramic output
– 63dB at 1kHz
capacitor, and uses a precision voltage reference and
– 57dB at 100kHz
feedback loop to achieve a worst-case accuracy of
– 38dB at 1MHz
3% over all load, line, process, and temperature
variations.
• Low Noise: (12.6 × V
OUT
+ 13.5) μV
RMS
typical
(100Hz to 100kHz)
This device is fully specified over the temperature
range of T
J
= –40°C to +125°C and is offered in a
• Stable with a 4.7μF Ceramic Capacitor
3mm × 3mm, SON-8 package with a thermal pad.
• Excellent Load/Line Transient Response
• 3% Overall Accuracy (over Load/Line/Temp)
• Over-Current and Over-Temperature
Protection
• Very Low Dropout: 170mV Typical at 1A
• 3mm × 3mm SON-8 DRB Package
APPLICATIONS
• Telecom Infrastructure
• Audio
• High-Speed I/F (PLL/VCO)
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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010–2013, 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.